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<?php |
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/* |
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* This file is part of the Laravel Lodash package. |
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* |
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* (c) Avtandil Kikabidze aka LONGMAN <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Longman\LaravelLodash\Eloquent; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\Model; |
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/** |
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* @mixin \Illuminate\Database\Eloquent\Model |
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* @method $this limitPerGroupViaSubQuery(Builder $query, int $limit = 10) |
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* @method $this limitPerGroupViaUnion(Builder $query, int $limit = 10, array $pivotColumns = []) |
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*/ |
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trait ManyToManyPreload |
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{ |
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public function scopeLimitPerGroupViaSubQuery(Builder $query, int $limit = 10): Model |
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{ |
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$table = $this->getTable(); |
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$queryKeyColumn = $query->getQuery()->wheres[0]['column']; |
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$join = $query->getQuery()->joins; |
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$newQuery = $this->newQueryWithoutScopes(); |
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$connection = $this->getConnection(); |
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// Initialize MySQL variables inline |
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$newQuery->from($connection->raw('(select @num:=0, @group:=0) as `vars`, ' . $this->quoteColumn($table))); |
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// If no columns already selected, let's select * |
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if (! $query->getQuery()->columns) { |
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$newQuery->select($table . '.*'); |
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} |
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// Make sure column aliases are unique |
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$groupAlias = $table . '_grp'; |
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$numAlias = $table . '_rn'; |
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// Apply mysql variables |
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$newQuery->addSelect($connection->raw( |
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"@num := if(@group = {$this->quoteColumn($queryKeyColumn)}, @num+1, 1) as `{$numAlias}`, @group := {$this->quoteColumn($queryKeyColumn)} as `{$groupAlias}`" |
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)); |
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// Make sure first order clause is the group order |
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$newQuery->getQuery()->orders = (array) $query->getQuery()->orders; |
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array_unshift($newQuery->getQuery()->orders, [ |
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'column' => $queryKeyColumn, |
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'direction' => 'asc', |
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]); |
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if ($join) { |
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$leftKey = explode('.', $queryKeyColumn)[1]; |
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$leftKeyColumn = "`{$table}`.`{$leftKey}`"; |
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$newQuery->addSelect($queryKeyColumn); |
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$newQuery->mergeBindings($query->getQuery()); |
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$newQuery->getQuery()->joins = (array) $query->getQuery()->joins; |
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$query->whereRaw("{$leftKeyColumn} = {$this->quoteColumn($queryKeyColumn)}"); |
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} |
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$query->from($connection->raw("({$newQuery->toSql()}) as `{$table}`")) |
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->where($numAlias, '<=', $limit); |
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return $this; |
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} |
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private function quoteColumn(string $column): string |
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{ |
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return '`' . str_replace('.', '`.`', $column) . '`'; |
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} |
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public function scopeLimitPerGroupViaUnion(Builder $query, int $limit = 10, array $pivotColumns = []): Model |
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{ |
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$table = $this->getTable(); |
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$queryKeyColumn = $query->getQuery()->wheres[0]['column']; |
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$joins = $query->getQuery()->joins; |
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$connection = $this->getConnection(); |
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$queryKeyValues = $query->getQuery()->wheres[0]['values']; |
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$pivotTable = explode('.', $queryKeyColumn)[0]; |
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$joinLeftColumn = $joins[0]->wheres[0]['first']; |
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$joinRightColumn = $joins[0]->wheres[0]['second']; |
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$joinOperator = $joins[0]->wheres[0]['operator']; |
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foreach ($queryKeyValues as $value) { |
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if (! isset($unionQuery1)) { |
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$unionQuery1 = $connection->table($pivotTable) |
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->select([$table . '.*']) |
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->join($table, $joinLeftColumn, $joinOperator, $joinRightColumn) |
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->where($queryKeyColumn, '=', $value) |
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->limit($limit); |
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} else { |
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$select = [ |
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$table . '.*', |
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]; |
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foreach ($pivotColumns as $pivotColumn) { |
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$select[] = $pivotTable . '.' . $pivotColumn . ' as pivot_' . $pivotColumn; |
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} |
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$unionQuery2 = $connection->table($pivotTable) |
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->select($select) |
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->join($table, $joinLeftColumn, $joinOperator, $joinRightColumn) |
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->where($queryKeyColumn, '=', $value) |
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->limit($limit); |
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$unionQuery1->unionAll($unionQuery2); |
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} |
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} |
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if (! isset($unionQuery1)) { |
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throw new InvalidArgumentException('Union query does not found'); |
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} |
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$query->setQuery($unionQuery1); |
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return $this; |
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} |
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} |
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akalongman /
laravel-lodash
Loading history...
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.