Childish\query\Builder

Complexity

Total Complexity

203

Size/Duplication

Total Lines	2074
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	5

Importance

Changes

0

116 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	9	1
A	select()	0	6	2
A	parseSubSelect()	0	12	3
A	addSelect()	0	8	2
A	distinct()	0	6	1
A	from()	0	6	1
A	mergeWheres()	0	8	1
B	where()	0	56	6
A	addArrayOfWheres()	0	12	4
A	prepareValueAndOperator()	0	10	3
A	invalidOperatorAndValue()	0	5	3
A	invalidOperator()	0	5	2
A	orWhere()	0	4	1
B	whereColumn()	0	27	3
A	orWhereColumn()	0	4	1
A	whereRaw()	0	8	1
A	orWhereRaw()	0	4	1
B	whereIn()	0	30	6
A	orWhereIn()	0	4	1
A	whereNotIn()	0	4	1
A	orWhereNotIn()	0	4	1
A	whereInExistingQuery()	0	10	2
A	whereNull()	0	8	2
A	orWhereNull()	0	4	1
A	whereNotNull()	0	4	1
A	whereBetween()	0	10	1
A	orWhereBetween()	0	4	1
A	whereNotBetween()	0	4	1
A	orWhereNotBetween()	0	4	1
A	orWhereNotNull()	0	4	1
A	whereDate()	0	8	1
A	orWhereDate()	0	4	1
A	whereTime()	0	4	1
A	orWhereTime()	0	4	1
A	whereDay()	0	8	1
A	whereMonth()	0	8	1
A	whereYear()	0	8	1
A	addDateBasedWhere()	0	8	1
A	whereNested()	0	6	1
A	forNestedWhere()	0	4	1
A	addNestedWhereQuery()	0	12	2
A	whereExists()	0	11	1
A	orWhereExists()	0	4	1
A	whereNotExists()	0	4	1
A	orWhereNotExists()	0	4	1
A	addWhereExistsQuery()	0	10	2
A	groupBy()	0	11	2
B	having()	0	26	3
A	orHaving()	0	4	1
A	havingRaw()	0	10	1
A	orHavingRaw()	0	4	1
A	orderBy()	0	9	3
A	orderByDesc()	0	4	1
A	orderByRaw()	0	10	2
A	skip()	0	4	1
A	offset()	0	8	2
A	take()	0	4	1
A	limit()	0	10	3
A	forPage()	0	4	1
A	union()	0	12	2
A	unionAll()	0	4	1
A	lock()	0	10	2
A	lockForUpdate()	0	4	1
A	sharedLock()	0	4	1
A	toSql()	0	4	1
A	find()	0	4	1
A	value()	0	6	2
A	get()	0	14	2
A	runSelect()	0	6	1
A	withoutSelectAliases()	0	7	3
A	cursor()	0	10	2
B	chunkById()	0	34	5
A	enforceOrderBy()	0	6	3
A	pluck()	0	12	2
A	stripTableForPluck()	0	4	2
A	implode()	0	4	1
A	exists()	0	17	2
A	count()	0	4	1
A	min()	0	4	1
A	max()	0	4	1
A	sum()	0	6	2
A	avg()	0	4	1
A	average()	0	4	1
A	aggregate()	0	11	2
A	cloneWithout()	0	8	2
A	cloneWithoutBindings()	0	8	2
A	higherOrderTap()	0	7	2
B	numericAggregate()	0	21	5
A	setAggregate()	0	12	2
B	insert()	0	32	4
A	insertGetId()	0	8	1
A	update()	0	7	1
A	updateOrInsert()	0	8	2
A	increment()	0	12	2
A	decrement()	0	12	2
A	delete()	0	13	2
A	truncate()	0	6	2
A	newQuery()	0	4	1
A	forSubQuery()	0	4	1
A	raw()	0	4	1
A	getBindings()	0	4	1
A	getRawBindings()	0	4	1
A	setBindings()	0	10	2
A	addBinding()	0	14	3
A	mergeBindings()	0	6	1
A	cleanBindings()	0	4	1
A	getConnection()	0	4	1
A	getProcessor()	0	4	1
A	getGrammar()	0	4	1
A	useWritePdo()	0	6	1
B	chunk()	0	32	4
A	each()	0	10	3
A	first()	0	4	1
B	when()	0	10	5
A	tap()	0	4	1
B	unless()	0	10	5

<?php
namespace Childish\query;

use Closure;
use RuntimeException;
use Childish\connection\ConnectionInterface;
use Childish\support\Collection;
use InvalidArgumentException;
use Childish\support\Tools;


/**
 * Builder
 *
 * @author    Pu ShaoWei <pushaowei520@gamil.com>
 * @date      2017/12/6
 * @package   App\db
 * @version   1.0
 */
class Builder
{
    /**
     * The base query builder instance.
     *
     * @var \Childish\connection\ConnectionInterface
     */
    public $connection;

    /**
     * The database query grammar instance.
     *
     * @var \Childish\query\Grammar
     */
    public $grammar;

    /**
     * The database query post processor instance.
     *
     * @var \Childish\query\Processor
     */
    public $processor;

    /**
     * The current query value bindings.
     *
     * @var array
     */
    public $bindings = [
        'select' => [],
        'join'   => [],
        'where'  => [],
        'having' => [],
        'order'  => [],
        'union'  => [],
    ];

    /**
     * An aggregate function and column to be run.
     *
     * @var array
     */
    public $aggregate;

    /**
     * The columns that should be returned.
     *
     * @var array
     */
    public $columns;

    /**
     * Indicates if the query returns distinct results.
     *
     * @var bool
     */
    public $distinct = false;

    /**
     * The table which the query is targeting.
     *
     * @var string
     */
    public $from;

    /**
     * The table joins for the query.
     *
     * @var array
     */
    public $joins;

    /**
     * The where constraints for the query.
     *
     * @var array
     */
    public $wheres = [];

    /**
     * The groupings for the query.
     *
     * @var array
     */
    public $groups;

    /**
     * The having constraints for the query.
     *
     * @var array
     */
    public $havings;

    /**
     * The orderings for the query.
     *
     * @var array
     */
    public $orders;

    /**
     * The maximum number of records to return.
     *
     * @var int
     */
    public $limit;

    /**
     * The number of records to skip.
     *
     * @var int
     */
    public $offset;

    /**
     * The query union statements.
     *
     * @var array
     */
    public $unions;

    /**
     * The maximum number of union records to return.
     *
     * @var int
     */
    public $unionLimit;

    /**
     * The number of union records to skip.
     *
     * @var int
     */
    public $unionOffset;

    /**
     * The orderings for the union query.
     *
     * @var array
     */
    public $unionOrders;

    /**
     * Indicates whether row locking is being used.
     *
     * @var string|bool
     */
    public $lock;

    /**
     * All of the available clause operators.
     *
     * @var array
     */
    public $operators = [
        '=', '<', '>', '<=', '>=', '<>', '!=', '<=>',
        'like', 'like binary', 'not like', 'between', 'ilike',
        '&', '|', '^', '<<', '>>',
        'rlike', 'regexp', 'not regexp',
        '~', '~*', '!~', '!~*', 'similar to',
        'not similar to', 'not ilike', '~~*', '!~~*',
    ];

    /**
     * Whether use write pdo for select.
     *
     * @var bool
     */
    public $useWritePdo = false;


    /**
     * Builder constructor.
     *
     * @param \Childish\connection\ConnectionInterface $connection
     * @param \Childish\query\Grammar|null             $grammar
     * @param \Childish\query\Processor|null           $processor
     */
    public function __construct(
        ConnectionInterface $connection,
        Grammar $grammar = null,
        Processor $processor = null)
    {
        $this->connection = $connection;
        $this->grammar    = $grammar;
        $this->processor  = $processor;
    }

    /**
     * Set the columns to be selected.
     *
     * @param  array|mixed $columns
     * @return $this
     */
    public function select($columns = ['*'])
    {
        $this->columns = is_array($columns) ? $columns : func_get_args();

        return $this;
    }

    /**
     * Parse the sub-select query into SQL and bindings.
     *
     * @param  mixed $query
     * @return array
     */
    protected function parseSubSelect($query)
    {
        if ($query instanceof self) {
            $query->columns = [$query->columns[0]];

            return [$query->toSql(), $query->getBindings()];
        } else if (is_string($query)) {
            return [$query, []];
        } else {
            throw new InvalidArgumentException;
        }
    }

    /**
     * Add a new select column to the query.
     *
     * @param  array|mixed $column
     * @return $this
     */
    public function addSelect($column)
    {
        $column = is_array($column) ? $column : func_get_args();

        $this->columns = array_merge((array)$this->columns, $column);

        return $this;
    }

    /**
     * Force the query to only return distinct results.
     *
     * @return $this
     */
    public function distinct()
    {
        $this->distinct = true;

        return $this;
    }

    /**
     * Set the table which the query is targeting.
     *
     * @param  string $table
     * @return $this
     */
    public function from($table)
    {
        $this->from = $table;

        return $this;
    }

    /**
     * Merge an array of where clauses and bindings.
     *
     * @param  array $wheres
     * @param  array $bindings
     * @return void
     */
    public function mergeWheres($wheres, $bindings)
    {
        $this->wheres = array_merge($this->wheres, (array)$wheres);

        $this->bindings['where'] = array_values(
            array_merge($this->bindings['where'], (array)$bindings)
        );
    }

    /**
     * Add a basic where clause to the query.
     *
     * @param  string|array|\Closure $column
     * @param  string|null           $operator
     * @param  mixed                 $value
     * @param  string                $boolean
     * @return $this
     */
    public function where($column, $operator = null, $value = null, $boolean = 'and')
    {
        // If the column is an array, we will assume it is an array of key-value pairs
        // and can add them each as a where clause. We will maintain the boolean we
        // received when the method was called and pass it into the nested where.
        if (is_array($column)) {
            return $this->addArrayOfWheres($column, $boolean);
        }

        // Here we will make some assumptions about the operator. If only 2 values are
        // passed to the method, we will assume that the operator is an equals sign
        // and keep going. Otherwise, we'll require the operator to be passed in.
        list($value, $operator) = $this->prepareValueAndOperator(
            $value, $operator, func_num_args() == 2
        );

        // If the columns is actually a Closure instance, we will assume the developer
        // wants to begin a nested where statement which is wrapped in parenthesis.
        // We'll add that Closure to the query then return back out immediately.
        if ($column instanceof Closure) {
            return $this->whereNested($column, $boolean);
        }

        // If the given operator is not found in the list of valid operators we will
        // assume that the developer is just short-cutting the '=' operators and
        // we will set the operators to '=' and set the values appropriately.
        if ($this->invalidOperator($operator)) {
            list($value, $operator) = [$operator, '='];
        }

        // If the value is a Closure, it means the developer is performing an entire
        // sub-select within the query and we will need to compile the sub-select
        // within the where clause to get the appropriate query record results.
        if ($value instanceof Closure) {
            return $this->whereSub($column, $operator, $value, $boolean);

The method whereSub() does not seem to exist on object<Childish\query\Builder>.

        }

        // If the value is "null", we will just assume the developer wants to add a
        // where null clause to the query. So, we will allow a short-cut here to
        // that method for convenience so the developer doesn't have to check.
        if (is_null($value)) {
            return $this->whereNull($column, $boolean, $operator !== '=');
        }

        // Now that we are working with just a simple query we can put the elements
        // in our array and add the query binding to our array of bindings that
        // will be bound to each SQL statements when it is finally executed.
        $type = 'Basic';

        $this->wheres[] = compact(
            'type', 'column', 'operator', 'value', 'boolean'
        );

        $this->addBinding($value, 'where');
        return $this;
    }

    /**
     * Add an array of where clauses to the query.
     *
     * @param  array  $column
     * @param  string $boolean
     * @param  string $method
     * @return $this
     */
    protected function addArrayOfWheres($column, $boolean, $method = 'where')
    {
        return $this->whereNested(function ($query) use ($column, $method, $boolean) {
            foreach ($column as $key => $value) {
                if (is_numeric($key) && is_array($value)) {
                    $query->{$method}(...array_values($value));
                } else {
                    $query->$method($key, '=', $value, $boolean);
                }
            }
        }, $boolean);
    }

    /**
     * Prepare the value and operator for a where clause.
     *
     * @param  string $value
     * @param  string $operator
     * @param  bool   $useDefault
     * @return array
     * @throws \InvalidArgumentException
     */
    protected function prepareValueAndOperator($value, $operator, $useDefault = false)
    {
        if ($useDefault) {
            return [$operator, '='];
        } else if ($this->invalidOperatorAndValue($operator, $value)) {
            throw new InvalidArgumentException('Illegal operator and value combination.');
        }

        return [$value, $operator];
    }

    /**
     * Determine if the given operator and value combination is legal.
     * Prevents using Null values with invalid operators.
     *
     * @param  string $operator
     * @param  mixed  $value
     * @return bool
     */
    protected function invalidOperatorAndValue($operator, $value)
    {
        return is_null($value) && in_array($operator, $this->operators) &&
               !in_array($operator, ['=', '<>', '!=']);
    }

    /**
     * Determine if the given operator is supported.
     *
     * @param  string $operator
     * @return bool
     */
    protected function invalidOperator($operator)
    {
        return !in_array(strtolower($operator), $this->operators, true) &&
               !in_array(strtolower($operator), $this->grammar->getOperators(), true);
    }

    /**
     * Add an "or where" clause to the query.
     *
     * @param  string|array|\Closure $column
     * @param  string|null           $operator
     * @param  mixed                 $value
     * @return \Childish\query\Builder|static
     */
    public function orWhere($column, $operator = null, $value = null)
    {
        return $this->where($column, $operator, $value, 'or');
    }

    /**
     * Add a "where" clause comparing two columns to the query.
     *
     * @param  string|array $first
     * @param  string|null  $operator
     * @param  string|null  $second
     * @param  string|null  $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereColumn($first, $operator = null, $second = null, $boolean = 'and')
    {
        // If the column is an array, we will assume it is an array of key-value pairs
        // and can add them each as a where clause. We will maintain the boolean we
        // received when the method was called and pass it into the nested where.
        if (is_array($first)) {
            return $this->addArrayOfWheres($first, $boolean, 'whereColumn');
        }

        // If the given operator is not found in the list of valid operators we will
        // assume that the developer is just short-cutting the '=' operators and
        // we will set the operators to '=' and set the values appropriately.
        if ($this->invalidOperator($operator)) {
            list($second, $operator) = [$operator, '='];
        }

        // Finally, we will add this where clause into this array of clauses that we
        // are building for the query. All of them will be compiled via a grammar
        // once the query is about to be executed and run against the database.
        $type = 'Column';

        $this->wheres[] = compact(
            'type', 'first', 'operator', 'second', 'boolean'
        );

        return $this;
    }

    /**
     * Add an "or where" clause comparing two columns to the query.
     *
     * @param  string|array $first
     * @param  string|null  $operator
     * @param  string|null  $second
     * @return \Childish\query\Builder|static
     */
    public function orWhereColumn($first, $operator = null, $second = null)
    {
        return $this->whereColumn($first, $operator, $second, 'or');
    }

    /**
     * Add a raw where clause to the query.
     *
     * @param  string $sql
     * @param  mixed  $bindings
     * @param  string $boolean
     * @return $this
     */
    public function whereRaw($sql, $bindings = [], $boolean = 'and')
    {
        $this->wheres[] = ['type' => 'raw', 'sql' => $sql, 'boolean' => $boolean];

        $this->addBinding((array)$bindings, 'where');

        return $this;
    }

    /**
     * Add a raw or where clause to the query.
     *
     * @param  string $sql
     * @param  mixed  $bindings
     * @return \Childish\query\Builder|static
     */
    public function orWhereRaw($sql, $bindings = [])
    {
        return $this->whereRaw($sql, $bindings, 'or');
    }

    /**
     * Add a "where in" clause to the query.
     *
     * @param  string $column
     * @param  mixed  $values
     * @param  string $boolean
     * @param  bool   $not
     * @return $this
     */
    public function whereIn($column, $values, $boolean = 'and', $not = false)
    {
        $type = $not ? 'NotIn' : 'In';

        if ($values instanceof Builder) {
            $values = $values->getQuery();

The method getQuery() does not seem to exist on object<Childish\query\Builder>.

        }

        // If the value is a query builder instance we will assume the developer wants to
        // look for any values that exists within this given query. So we will add the
        // query accordingly so that this query is properly executed when it is run.
        if ($values instanceof self) {
            return $this->whereInExistingQuery(
                $column, $values, $boolean, $not
            );
        }


        // If the value of the where in clause is actually a Closure, we will assume that
        // the developer is using a full sub-select for this "in" statement, and will
        // execute those Closures, then we can re-construct the entire sub-selects.
        if ($values instanceof \Closure) {
            return $this->whereInSub($column, $values, $boolean, $not);

The method whereInSub() does not exist on Childish\query\Builder. Did you maybe mean whereIn()?

        }
        foreach ($values as $value) {
            $this->addBinding($value, 'where');
        }
        $this->wheres[] = compact('type', 'column', 'values', 'boolean');
        return $this;
    }

    /**
     * Add an "or where in" clause to the query.
     *
     * @param  string $column
     * @param  mixed  $values
     * @return \Childish\query\Builder|static
     */
    public function orWhereIn($column, $values)
    {
        return $this->whereIn($column, $values, 'or');
    }

    /**
     * Add a "where not in" clause to the query.
     *
     * @param  string $column
     * @param  mixed  $values
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereNotIn($column, $values, $boolean = 'and')
    {
        return $this->whereIn($column, $values, $boolean, true);
    }

    /**
     * Add an "or where not in" clause to the query.
     *
     * @param  string $column
     * @param  mixed  $values
     * @return \Childish\query\Builder|static
     */
    public function orWhereNotIn($column, $values)
    {
        return $this->whereNotIn($column, $values, 'or');
    }


    /**
     * Add an external sub-select to the query.
     *
     * @param  string                         $column
     * @param  \Childish\query\Builder|static $query
     * @param  string                         $boolean
     * @param  bool                           $not
     * @return $this
     */
    protected function whereInExistingQuery($column, $query, $boolean, $not)
    {
        $type = $not ? 'NotInSub' : 'InSub';

        $this->wheres[] = compact('type', 'column', 'query', 'boolean');

        $this->addBinding($query->getBindings(), 'where');

        return $this;
    }

    /**
     * Add a "where null" clause to the query.
     *
     * @param  string $column
     * @param  string $boolean
     * @param  bool   $not
     * @return $this
     */
    public function whereNull($column, $boolean = 'and', $not = false)
    {
        $type = $not ? 'NotNull' : 'Null';

        $this->wheres[] = compact('type', 'column', 'boolean');

        return $this;
    }

    /**
     * Add an "or where null" clause to the query.
     *
     * @param  string $column
     * @return \Childish\query\Builder|static
     */
    public function orWhereNull($column)
    {
        return $this->whereNull($column, 'or');
    }

    /**
     * Add a "where not null" clause to the query.
     *
     * @param  string $column
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereNotNull($column, $boolean = 'and')
    {
        return $this->whereNull($column, $boolean, true);
    }

    /**
     * Add a where between statement to the query.
     *
     * @param  string $column
     * @param  array  $values
     * @param  string $boolean
     * @param  bool   $not
     * @return $this
     */
    public function whereBetween($column, array $values, $boolean = 'and', $not = false)
    {
        $type = 'between';

        $this->wheres[] = compact('column', 'type', 'boolean', 'not');

        $this->addBinding($values, 'where');

        return $this;
    }

    /**
     * Add an or where between statement to the query.
     *
     * @param  string $column
     * @param  array  $values
     * @return \Childish\query\Builder|static
     */
    public function orWhereBetween($column, array $values)
    {
        return $this->whereBetween($column, $values, 'or');
    }

    /**
     * Add a where not between statement to the query.
     *
     * @param  string $column
     * @param  array  $values
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereNotBetween($column, array $values, $boolean = 'and')
    {
        return $this->whereBetween($column, $values, $boolean, true);
    }

    /**
     * Add an or where not between statement to the query.
     *
     * @param  string $column
     * @param  array  $values
     * @return \Childish\query\Builder|static
     */
    public function orWhereNotBetween($column, array $values)
    {
        return $this->whereNotBetween($column, $values, 'or');
    }

    /**
     * Add an "or where not null" clause to the query.
     *
     * @param  string $column
     * @return \Childish\query\Builder|static
     */
    public function orWhereNotNull($column)
    {
        return $this->whereNotNull($column, 'or');
    }

    /**
     * Add a "where date" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  mixed  $value
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereDate($column, $operator, $value = null, $boolean = 'and')
    {
        list($value, $operator) = $this->prepareValueAndOperator(
            $value, $operator, func_num_args() == 2
        );

        return $this->addDateBasedWhere('Date', $column, $operator, $value, $boolean);
    }

    /**
     * Add an "or where date" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  string $value
     * @return \Childish\query\Builder|static
     */
    public function orWhereDate($column, $operator, $value)
    {
        return $this->whereDate($column, $operator, $value, 'or');
    }

    /**
     * Add a "where time" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  int    $value
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereTime($column, $operator, $value, $boolean = 'and')
    {
        return $this->addDateBasedWhere('Time', $column, $operator, $value, $boolean);
    }

    /**
     * Add an "or where time" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  int    $value
     * @return \Childish\query\Builder|static
     */
    public function orWhereTime($column, $operator, $value)
    {
        return $this->whereTime($column, $operator, $value, 'or');
    }

    /**
     * Add a "where day" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  mixed  $value
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereDay($column, $operator, $value = null, $boolean = 'and')
    {
        list($value, $operator) = $this->prepareValueAndOperator(
            $value, $operator, func_num_args() == 2
        );

        return $this->addDateBasedWhere('Day', $column, $operator, $value, $boolean);
    }

    /**
     * Add a "where month" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  mixed  $value
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereMonth($column, $operator, $value = null, $boolean = 'and')
    {
        list($value, $operator) = $this->prepareValueAndOperator(
            $value, $operator, func_num_args() == 2
        );

        return $this->addDateBasedWhere('Month', $column, $operator, $value, $boolean);
    }

    /**
     * Add a "where year" statement to the query.
     *
     * @param  string $column
     * @param  string $operator
     * @param  mixed  $value
     * @param  string $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereYear($column, $operator, $value = null, $boolean = 'and')
    {
        list($value, $operator) = $this->prepareValueAndOperator(
            $value, $operator, func_num_args() == 2
        );

        return $this->addDateBasedWhere('Year', $column, $operator, $value, $boolean);
    }

    /**
     * Add a date based (year, month, day, time) statement to the query.
     *
     * @param  string $type
     * @param  string $column
     * @param  string $operator
     * @param  int    $value
     * @param  string $boolean
     * @return $this
     */
    protected function addDateBasedWhere($type, $column, $operator, $value, $boolean = 'and')
    {
        $this->wheres[] = compact('column', 'type', 'boolean', 'operator', 'value');

        $this->addBinding($value, 'where');

        return $this;
    }

    /**
     * Add a nested where statement to the query.
     *
     * @param  \Closure $callback
     * @param  string   $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereNested(Closure $callback, $boolean = 'and')
    {
        call_user_func($callback, $query = $this->forNestedWhere());

        return $this->addNestedWhereQuery($query, $boolean);
    }

    /**
     * Create a new query instance for nested where condition.
     *
     * @return \Childish\query\Builder
     */
    public function forNestedWhere()
    {
        return $this->newQuery()->from($this->from);
    }

    /**
     * Add another query builder as a nested where to the query builder.
     *
     * @param  \Childish\query\Builder|static $query
     * @param  string                         $boolean
     * @return $this
     */
    public function addNestedWhereQuery($query, $boolean = 'and')
    {
        if (count($query->wheres)) {
            $type = 'Nested';

            $this->wheres[] = compact('type', 'query', 'boolean');

            $this->addBinding($query->getBindings(), 'where');
        }

        return $this;
    }

    /**
     * Add an exists clause to the query.
     *
     * @param  \Closure $callback
     * @param  string   $boolean
     * @param  bool     $not
     * @return $this
     */
    public function whereExists(Closure $callback, $boolean = 'and', $not = false)
    {
        $query = $this->forSubQuery();

        // Similar to the sub-select clause, we will create a new query instance so
        // the developer may cleanly specify the entire exists query and we will
        // compile the whole thing in the grammar and insert it into the SQL.
        call_user_func($callback, $query);

        return $this->addWhereExistsQuery($query, $boolean, $not);
    }

    /**
     * Add an or exists clause to the query.
     *
     * @param  \Closure $callback
     * @param  bool     $not
     * @return \Childish\query\Builder|static
     */
    public function orWhereExists(Closure $callback, $not = false)
    {
        return $this->whereExists($callback, 'or', $not);
    }

    /**
     * Add a where not exists clause to the query.
     *
     * @param  \Closure $callback
     * @param  string   $boolean
     * @return \Childish\query\Builder|static
     */
    public function whereNotExists(Closure $callback, $boolean = 'and')
    {
        return $this->whereExists($callback, $boolean, true);
    }

    /**
     * Add a where not exists clause to the query.
     *
     * @param  \Closure $callback
     * @return \Childish\query\Builder|static
     */
    public function orWhereNotExists(Closure $callback)
    {
        return $this->orWhereExists($callback, true);
    }

    /**
     * Add an exists clause to the query.
     *
     * @param  \Childish\query\Builder $query
     * @param  string                  $boolean
     * @param  bool                    $not
     * @return $this
     */
    public function addWhereExistsQuery(Builder $query, $boolean = 'and', $not = false)
    {
        $type = $not ? 'NotExists' : 'Exists';

        $this->wheres[] = compact('type', 'operator', 'query', 'boolean');

        $this->addBinding($query->getBindings(), 'where');

        return $this;
    }


    /**
     * Add a "group by" clause to the query.
     *
     * @param  array ...$groups
     * @return $this
     */
    public function groupBy(...$groups)
    {
        foreach ($groups as $group) {
            $this->groups = array_merge(
                (array)$this->groups,
                Tools::wrap($group)
            );
        }

        return $this;
    }

    /**
     * Add a "having" clause to the query.
     *
     * @param  string      $column
     * @param  string|null $operator
     * @param  string|null $value
     * @param  string      $boolean
     * @return $this
     */
    public function having($column, $operator = null, $value = null, $boolean = 'and')
    {
        $type = 'Basic';

        // Here we will make some assumptions about the operator. If only 2 values are
        // passed to the method, we will assume that the operator is an equals sign
        // and keep going. Otherwise, we'll require the operator to be passed in.
        list($value, $operator) = $this->prepareValueAndOperator(
            $value, $operator, func_num_args() == 2
        );

        // If the given operator is not found in the list of valid operators we will
        // assume that the developer is just short-cutting the '=' operators and
        // we will set the operators to '=' and set the values appropriately.
        if ($this->invalidOperator($operator)) {
            list($value, $operator) = [$operator, '='];
        }

        $this->havings[] = compact('type', 'column', 'operator', 'value', 'boolean');

        if (!$value instanceof Expression) {

The class Childish\query\Expression does not exist. Did you forget a USE statement, or did you not list all dependencies?

            $this->addBinding($value, 'having');
        }

        return $this;
    }

    /**
     * Add a "or having" clause to the query.
     *
     * @param  string      $column
     * @param  string|null $operator
     * @param  string|null $value
     * @return \Childish\query\Builder|static
     */
    public function orHaving($column, $operator = null, $value = null)
    {
        return $this->having($column, $operator, $value, 'or');
    }

    /**
     * Add a raw having clause to the query.
     *
     * @param  string $sql
     * @param  array  $bindings
     * @param  string $boolean
     * @return $this
     */
    public function havingRaw($sql, array $bindings = [], $boolean = 'and')
    {
        $type = 'Raw';

        $this->havings[] = compact('type', 'sql', 'boolean');

        $this->addBinding($bindings, 'having');

        return $this;
    }

    /**
     * Add a raw or having clause to the query.
     *
     * @param  string $sql
     * @param  array  $bindings
     * @return \Childish\query\Builder|static
     */
    public function orHavingRaw($sql, array $bindings = [])
    {
        return $this->havingRaw($sql, $bindings, 'or');
    }

    /**
     * Add an "order by" clause to the query.
     *
     * @param  string $column
     * @param  string $direction
     * @return $this
     */
    public function orderBy($column, $direction = 'asc')
    {
        $this->{$this->unions ? 'unionOrders' : 'orders'}[] = [
            'column'    => $column,
            'direction' => strtolower($direction) == 'asc' ? 'asc' : 'desc',
        ];

        return $this;
    }

    /**
     * Add a descending "order by" clause to the query.
     *
     * @param  string $column
     * @return $this
     */
    public function orderByDesc($column)
    {
        return $this->orderBy($column, 'desc');
    }

    /**
     * Add a raw "order by" clause to the query.
     *
     * @param  string $sql
     * @param  array  $bindings
     * @return $this
     */
    public function orderByRaw($sql, $bindings = [])
    {
        $type = 'Raw';

        $this->{$this->unions ? 'unionOrders' : 'orders'}[] = compact('type', 'sql');

        $this->addBinding($bindings, 'order');

        return $this;
    }

    /**
     * Alias to set the "offset" value of the query.
     *
     * @param  int $value
     * @return \Childish\query\Builder|static
     */
    public function skip($value)
    {
        return $this->offset($value);
    }

    /**
     * Set the "offset" value of the query.
     *
     * @param  int $value
     * @return $this
     */
    public function offset($value)
    {
        $property = $this->unions ? 'unionOffset' : 'offset';

        $this->$property = max(0, $value);

        return $this;
    }

    /**
     * Alias to set the "limit" value of the query.
     *
     * @param  int $value
     * @return \Childish\query\Builder|static
     */
    public function take($value)
    {
        return $this->limit($value);
    }

    /**
     * Set the "limit" value of the query.
     *
     * @param  int $value
     * @return $this
     */
    public function limit($value)
    {
        $property = $this->unions ? 'unionLimit' : 'limit';

        if ($value >= 0) {
            $this->$property = $value;
        }

        return $this;
    }

    /**
     * Set the limit and offset for a given page.
     *
     * @param  int $page
     * @param  int $perPage
     * @return \Childish\query\Builder|static
     */
    public function forPage($page, $perPage = 15)
    {
        return $this->skip(($page - 1) * $perPage)->take($perPage);
    }

    /**
     * Add a union statement to the query.
     *
     * @param  \Childish\query\Builder|\Closure $query
     * @param  bool                             $all
     * @return \Childish\query\Builder|static
     */
    public function union($query, $all = false)
    {
        if ($query instanceof Closure) {
            call_user_func($query, $query = $this->newQuery());
        }

        $this->unions[] = compact('query', 'all');

        $this->addBinding($query->getBindings(), 'union');

        return $this;
    }

    /**
     * Add a union all statement to the query.
     *
     * @param  \Childish\query\Builder|\Closure $query
     * @return \Childish\query\Builder|static
     */
    public function unionAll($query)
    {
        return $this->union($query, true);
    }

    /**
     * Lock the selected rows in the table.
     *
     * @param  string|bool $value
     * @return $this
     */
    public function lock($value = true)
    {
        $this->lock = $value;

        if (!is_null($this->lock)) {
            $this->useWritePdo();
        }

        return $this;
    }

    /**
     * Lock the selected rows in the table for updating.
     *
     * @return \Childish\query\Builder
     */
    public function lockForUpdate()
    {
        return $this->lock(true);
    }

    /**
     * Share lock the selected rows in the table.
     *
     * @return \Childish\query\Builder
     */
    public function sharedLock()
    {
        return $this->lock(false);
    }

    /**
     * Get the SQL representation of the query.
     *
     * @return string
     */
    public function toSql()
    {
        return $this->grammar->compileSelect($this);
    }

    /**
     * Execute a query for a single record by ID.
     *
     * @param  int   $id
     * @param  array $columns
     * @return mixed|static
     */
    public function find($id, $columns = ['*'])
    {
        return $this->where('id', '=', $id)->first($columns);
    }

    /**
     * Get a single column's value from the first result of a query.
     *
     * @param  string $column
     * @return mixed
     */
    public function value($column)
    {
        $result = (array)$this->first([$column]);

        return count($result) > 0 ? reset($result) : null;
    }

    /**
     * Execute the query as a "select" statement.
     *
     * @param  array $columns
     * @return \childish\support\Collection
     */
    public function get($columns = ['*'])
    {
        $original = $this->columns;

        if (is_null($original)) {
            $this->columns = $columns;
        }

        $results = $this->processor->processSelect($this, $this->runSelect());

        $this->columns = $original;

It seems like $original can be null. However, the property $columns is declared as array. Maybe change the type of the property to array|null or add a type check?

        return new Collection($results);
    }

    /**
     * Run the query as a "select" statement against the connection.
     *
     * @return array
     */
    protected function runSelect()
    {
        return $this->connection->select(
            $this->toSql(), $this->getBindings(), !$this->useWritePdo

The call to ConnectionInterface::select() has too many arguments starting with !$this->useWritePdo.

        );
    }


    /**
     * Remove the column aliases since they will break count queries.
     *
     * @param  array $columns
     * @return array
     */
    protected function withoutSelectAliases(array $columns)
    {
        return array_map(function ($column) {
            return is_string($column) && ($aliasPosition = strpos(strtolower($column), ' as ')) !== false
                ? substr($column, 0, $aliasPosition) : $column;

The variable $aliasPosition does not seem to be defined for all execution paths leading up to this point.

        }, $columns);
    }

    /**
     * Get a generator for the given query.
     *
     * @return \Generator
     */
    public function cursor()
    {
        if (is_null($this->columns)) {
            $this->columns = ['*'];
        }

        return $this->connection->cursor(
            $this->toSql(), $this->getBindings(), !$this->useWritePdo
        );
    }

    /**
     * Chunk the results of a query by comparing numeric IDs.
     *
     * @param  int      $count
     * @param  callable $callback
     * @param  string   $column
     * @param  string   $alias
     * @return bool
     */
    public function chunkById($count, callable $callback, $column = 'id', $alias = null)
    {
        $alias = $alias ? : $column;

        $lastId = 0;

        do {
            $clone = clone $this;

            // We'll execute the query for the given page and get the results. If there are
            // no results we can just break and return from here. When there are results
            // we will call the callback with the current chunk of these results here.
            $results = $clone->forPageAfterId($count, $lastId, $column)->get();

The method forPageAfterId() does not exist on Childish\query\Builder. Did you maybe mean forPage()?

            $countResults = $results->count();

            if ($countResults == 0) {
                break;
            }

            // On each chunk result set, we will pass them to the callback and then let the
            // developer take care of everything within the callback, which allows us to
            // keep the memory low for spinning through large result sets for working.
            if ($callback($results) === false) {
                return false;
            }

            $lastId = $results->last()->{$alias};

            unset($results);
        } while ($countResults == $count);

        return true;
    }

    /**
     * Throw an exception if the query doesn't have an orderBy clause.
     *
     * @return void
     * @throws \RuntimeException
     */
    protected function enforceOrderBy()
    {
        if (empty($this->orders) && empty($this->unionOrders)) {
            throw new RuntimeException('You must specify an orderBy clause when using this function.');
        }
    }

    /**
     * Get an array with the values of a given column.
     *
     * @param  string      $column
     * @param  string|null $key
     * @return \Childish\support\Collection
     */
    public function pluck($column, $key = null)
    {
        $results = $this->get(is_null($key) ? [$column] : [$column, $key]);

        // If the columns are qualified with a table or have an alias, we cannot use
        // those directly in the "pluck" operations since the results from the DB
        // are only keyed by the column itself. We'll strip the table out here.
        return $results->pluck(
            $this->stripTableForPluck($column),
            $this->stripTableForPluck($key)
        );
    }

    /**
     * Strip off the table name or alias from a column identifier.
     *
     * @param  string $column
     * @return string|null
     */
    protected function stripTableForPluck($column)
    {
        return is_null($column) ? $column : last(preg_split('~\.| ~', $column));
    }

    /**
     * Concatenate values of a given column as a string.
     *
     * @param  string $column
     * @param  string $glue
     * @return string
     */
    public function implode($column, $glue = '')
    {
        return $this->pluck($column)->implode($glue);
    }

    /**
     * Determine if any rows exist for the current query.
     *
     * @return bool
     */
    public function exists()
    {
        $results = $this->connection->select(
            $this->grammar->compileExists($this), $this->getBindings(), !$this->useWritePdo

The call to ConnectionInterface::select() has too many arguments starting with !$this->useWritePdo.

        );

        // If the results has rows, we will get the row and see if the exists column is a
        // boolean true. If there is no results for this query we will return false as
        // there are no rows for this query at all and we can return that info here.
        if (isset($results[0])) {
            $results = (array)$results[0];

            return (bool)$results['exists'];
        }

        return false;
    }

    /**
     * Retrieve the "count" result of the query.
     *
     * @param  string $columns
     * @return int
     */
    public function count($columns = '*')
    {
        return (int)$this->aggregate(__FUNCTION__, Tools::wrap($columns));
    }

    /**
     * Retrieve the minimum value of a given column.
     *
     * @param  string $column
     * @return mixed
     */
    public function min($column)
    {
        return $this->aggregate(__FUNCTION__, [$column]);
    }

    /**
     * Retrieve the maximum value of a given column.
     *
     * @param  string $column
     * @return mixed
     */
    public function max($column)
    {
        return $this->aggregate(__FUNCTION__, [$column]);
    }

    /**
     * Retrieve the sum of the values of a given column.
     *
     * @param  string $column
     * @return mixed
     */
    public function sum($column)
    {
        $result = $this->aggregate(__FUNCTION__, [$column]);

        return $result ? : 0;
    }

    /**
     * Retrieve the average of the values of a given column.
     *
     * @param  string $column
     * @return mixed
     */
    public function avg($column)
    {
        return $this->aggregate(__FUNCTION__, [$column]);
    }

    /**
     * Alias for the "avg" method.
     *
     * @param  string $column
     * @return mixed
     */
    public function average($column)
    {
        return $this->avg($column);
    }

    /**
     * Execute an aggregate function on the database.
     *
     * @param  string $function
     * @param  array  $columns
     * @return mixed
     */
    public function aggregate($function, $columns = ['*'])
    {
        $results = $this->cloneWithout(['columns'])
                        ->cloneWithoutBindings(['select'])
                        ->setAggregate($function, $columns)
                        ->get($columns);

        if (!$results->isEmpty()) {
            return array_change_key_case((array)$results[0])['aggregate'];
        }
    }

    /**
     * Clone the query without the given properties.
     *
     * @param  array $properties
     * @return static
     */
    public function cloneWithout(array $properties)
    {
        return $this->higherOrderTap(clone $this, function ($clone) use ($properties) {
            foreach ($properties as $property) {
                $clone->{$property} = null;
            }
        });
    }

    /**
     * Clone the query without the given bindings.
     *
     * @param  array $except
     * @return static
     */
    public function cloneWithoutBindings(array $except)
    {
        return $this->higherOrderTap(clone $this, function ($clone) use ($except) {
            foreach ($except as $type) {
                $clone->bindings[$type] = [];
            }
        });
    }

    /**
     * Call the given Closure with the given value then return the value.
     *
     * @param  mixed         $value
     * @param  callable|null $callback
     * @return mixed
     */
    public function higherOrderTap($value, $callback = null)
    {
        if (is_null($callback) === false) {
            $callback($value);
        }
        return $value;
    }

    /**
     * Execute a numeric aggregate function on the database.
     *
     * @param  string $function
     * @param  array  $columns
     * @return float|int
     */
    public function numericAggregate($function, $columns = ['*'])
    {
        $result = $this->aggregate($function, $columns);

        // If there is no result, we can obviously just return 0 here. Next, we will check
        // if the result is an integer or float. If it is already one of these two data
        // types we can just return the result as-is, otherwise we will convert this.
        if (!$result) {
            return 0;
        }

        if (is_int($result) || is_float($result)) {
            return $result;
        }

        // If the result doesn't contain a decimal place, we will assume it is an int then
        // cast it to one. When it does we will cast it to a float since it needs to be
        // cast to the expected data type for the developers out of pure convenience.
        return strpos((string)$result, '.') === false
            ? (int)$result : (float)$result;
    }

    /**
     * Set the aggregate property without running the query.
     *
     * @param  string $function
     * @param  array  $columns
     * @return $this
     */
    protected function setAggregate($function, $columns)
    {
        $this->aggregate = compact('function', 'columns');

        if (empty($this->groups)) {
            $this->orders = null;

It seems like null of type null is incompatible with the declared type array of property $orders.

            $this->bindings['order'] = [];
        }

        return $this;
    }

    /**
     * Insert a new record into the database.
     *
     * @param  array $values
     * @return bool
     */
    public function insert(array $values)
    {
        // Since every insert gets treated like a batch insert, we will make sure the
        // bindings are structured in a way that is convenient when building these
        // inserts statements by verifying these elements are actually an array.
        if (empty($values)) {
            return true;
        }

        if (!is_array(reset($values))) {
            $values = [$values];
        }

        // Here, we will sort the insert keys for every record so that each insert is
        // in the same order for the record. We need to make sure this is the case
        // so there are not any errors or problems when inserting these records.
        else {
            foreach ($values as $key => $value) {
                ksort($value);

                $values[$key] = $value;
            }
        }

        // Finally, we will run this query against the database connection and return
        // the results. We will need to also flatten these bindings before running
        // the query so they are all in one huge, flattened array for execution.
        return $this->connection->insert(
            $this->grammar->compileInsert($this, $values),
            $this->cleanBindings(Tools::flatten($values, 1))
        );
    }

    /**
     * Insert a new record and get the value of the primary key.
     *
     * @param  array       $values
     * @param  string|null $sequence
     * @return int
     */
    public function insertGetId(array $values, $sequence = null)
    {
        $sql = $this->grammar->compileInsertGetId($this, $values, $sequence);

        $values = $this->cleanBindings($values);

        return $this->processor->processInsertGetId($this, $sql, $values, $sequence);
    }

    /**
     * Update a record in the database.
     *
     * @param  array $values
     * @return int
     */
    public function update(array $values)
    {
        $sql = $this->grammar->compileUpdate($this, $values);
        return $this->connection->update($sql, $this->cleanBindings(
            $this->grammar->prepareBindingsForUpdate($this->bindings, $values)
        ));
    }

    /**
     * Insert or update a record matching the attributes, and fill it with values.
     *
     * @param  array $attributes
     * @param  array $values
     * @return bool
     */
    public function updateOrInsert(array $attributes, array $values = [])
    {
        if (!$this->where($attributes)->exists()) {
            return $this->insert(array_merge($attributes, $values));
        }

        return (bool)$this->take(1)->update($values);
    }

    /**
     * Increment a column's value by a given amount.
     *
     * @param  string $column
     * @param  int    $amount
     * @param  array  $extra
     * @return int
     */
    public function increment($column, $amount = 1, array $extra = [])
    {
        if (!is_numeric($amount)) {
            throw new InvalidArgumentException('Non-numeric value passed to increment method.');
        }

        $wrapped = $this->grammar->wrap($column);

        $columns = array_merge([$column => $this->raw("$wrapped + $amount")], $extra);

        return $this->update($columns);
    }

    /**
     * Decrement a column's value by a given amount.
     *
     * @param  string $column
     * @param  int    $amount
     * @param  array  $extra
     * @return int
     */
    public function decrement($column, $amount = 1, array $extra = [])
    {
        if (!is_numeric($amount)) {
            throw new InvalidArgumentException('Non-numeric value passed to decrement method.');
        }

        $wrapped = $this->grammar->wrap($column);

        $columns = array_merge([$column => $this->raw("$wrapped - $amount")], $extra);

        return $this->update($columns);
    }

    /**
     * Delete a record from the database.
     *
     * @param  mixed $id
     * @return int
     */
    public function delete($id = null)
    {
        // If an ID is passed to the method, we will set the where clause to check the
        // ID to let developers to simply and quickly remove a single row from this
        // database without manually specifying the "where" clauses on the query.
        if (!is_null($id)) {
            $this->where($this->from . '.id', '=', $id);
        }

        return $this->connection->delete(
            $this->grammar->compileDelete($this), $this->getBindings()
        );
    }

    /**
     * Run a truncate statement on the table.
     *
     * @return void
     */
    public function truncate()
    {
        foreach ($this->grammar->compileTruncate($this) as $sql => $bindings) {
            $this->connection->statement($sql, $bindings);
        }
    }

    /**
     * Get a new instance of the query builder.
     *
     * @return \Childish\query\Builder
     */
    public function newQuery()
    {
        return new static($this->connection, $this->grammar, $this->processor);
    }

    /**
     * Create a new query instance for a sub-query.
     *
     * @return \Childish\query\Builder
     */
    protected function forSubQuery()
    {
        return $this->newQuery();
    }

    /**
     * Create a raw database expression.
     *
     * @param $value
     * @return mixed
     */
    public function raw($value)
    {
        return $value;
    }

    /**
     * Get the current query value bindings in a flattened array.
     *
     * @return array
     */
    public function getBindings()
    {
        return Tools::flatten($this->bindings);
    }

    /**
     * Get the raw array of bindings.
     *
     * @return array
     */
    public function getRawBindings()
    {
        return $this->bindings;
    }

    /**
     * Set the bindings on the query builder.
     *
     * @param  array  $bindings
     * @param  string $type
     * @return $this
     * @throws \InvalidArgumentException
     */
    public function setBindings(array $bindings, $type = 'where')
    {
        if (!array_key_exists($type, $this->bindings)) {
            throw new InvalidArgumentException("Invalid binding type: {$type}.");
        }

        $this->bindings[$type] = $bindings;

        return $this;
    }

    /**
     * Add a binding to the query.
     *
     * @param  mixed  $value
     * @param  string $type
     * @return $this
     * @throws \InvalidArgumentException
     */
    public function addBinding($value, $type = 'where')
    {
        if (!array_key_exists($type, $this->bindings)) {
            throw new InvalidArgumentException("Invalid binding type: {$type}.");
        }

        if (is_array($value)) {
            $this->bindings[$type] = array_values(array_merge($this->bindings[$type], $value));
        } else {
            $this->bindings[$type][] = $value;
        }

        return $this;
    }

    /**
     * Merge an array of bindings into our bindings.
     *
     * @param  \Childish\query\Builder $query
     * @return $this
     */
    public function mergeBindings(Builder $query)
    {
        $this->bindings = array_merge_recursive($this->bindings, $query->bindings);

        return $this;
    }

    /**
     * Remove all of the expressions from a list of bindings.
     *
     * @param  array $bindings
     * @return array
     */
    protected function cleanBindings(array $bindings)
    {
        return array_values($bindings);
    }

    /**
     * Get the database connection instance.
     *
     * @return \Childish\connection\ConnectionInterface
     */
    public function getConnection()
    {
        return $this->connection;
    }

    /**
     * Get the database query processor instance.
     *
     * @return \Childish\query\Processor
     */
    public function getProcessor()
    {
        return $this->processor;
    }

    /**
     * Get the query grammar instance.
     *
     * @return \Childish\query\Grammar
     */
    public function getGrammar()
    {
        return $this->grammar;
    }

    /**
     * Use the write pdo for query.
     *
     * @return $this
     */
    public function useWritePdo()
    {
        $this->useWritePdo = true;

        return $this;
    }

    /**
     * Chunk the results of the query.
     *
     * @param  int      $count
     * @param  callable $callback
     * @return bool
     */
    public function chunk($count, callable $callback)
    {
        $this->enforceOrderBy();

        $page = 1;

        do {
            // We'll execute the query for the given page and get the results. If there are
            // no results we can just break and return from here. When there are results
            // we will call the callback with the current chunk of these results here.
            $results = $this->forPage($page, $count)->get();

            $countResults = $results->count();

            if ($countResults == 0) {
                break;
            }

            // On each chunk result set, we will pass them to the callback and then let the
            // developer take care of everything within the callback, which allows us to
            // keep the memory low for spinning through large result sets for working.
            if ($callback($results, $page) === false) {
                return false;
            }

            unset($results);

            $page++;
        } while ($countResults == $count);

        return true;
    }

    /**
     * Execute a callback over each item while chunking.
     *
     * @param  callable $callback
     * @param  int      $count
     * @return bool
     */
    public function each(callable $callback, $count = 1000)
    {
        return $this->chunk($count, function ($results) use ($callback) {
            foreach ($results as $key => $value) {
                if ($callback($value, $key) === false) {
                    return false;
                }
            }
        });
    }

    /**
     * Execute the query and get the first result.
     *
     * @param  array $columns
     * @return \childish\support\Collection
     */
    public function first($columns = ['*'])
    {
        return $this->take(1)->get($columns)->first();
    }

    /**
     * Apply the callback's query changes if the given "value" is true.
     *
     * @param  mixed    $value
     * @param  callable $callback
     * @param  callable $default
     * @return mixed
     */
    public function when($value, $callback, $default = null)
    {
        if ($value) {
            return $callback($this, $value) ? : $this;
        } else if ($default) {
            return $default($this, $value) ? : $this;
        }

        return $this;
    }

    /**
     * Pass the query to a given callback.
     *
     * @param  \Closure $callback
     * @return \Childish\query\Builder
     */
    public function tap($callback)
    {
        return $this->when(true, $callback);
    }

    /**
     * Apply the callback's query changes if the given "value" is false.
     *
     * @param  mixed    $value
     * @param  callable $callback
     * @param  callable $default
     * @return mixed
     */
    public function unless($value, $callback, $default = null)
    {
        if (!$value) {
            return $callback($this, $value) ? : $this;
        } else if ($default) {
            return $default($this, $value) ? : $this;
        }

        return $this;
    }
}