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<?php |
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/** |
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* Cycle DataMapper ORM |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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declare(strict_types=1); |
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namespace Cycle\ORM; |
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use Countable; |
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use Cycle\ORM\Heap\Node; |
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use Cycle\ORM\Select\ConstrainInterface; |
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use Cycle\ORM\Select\JoinableLoader; |
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use Cycle\ORM\Select\QueryBuilder; |
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use Cycle\ORM\Select\RootLoader; |
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use Cycle\ORM\Select\ScopeInterface; |
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use IteratorAggregate; |
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use Spiral\Database\Query\SelectQuery; |
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use Spiral\Pagination\PaginableInterface; |
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/** |
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* Query builder and entity selector. Mocks SelectQuery. Attention, Selector does not mount RootLoader scope by default. |
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* |
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* Trait provides the ability to transparently configure underlying loader query. |
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* |
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* @method Select distinct() |
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* @method Select where(...$args); |
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* @method Select andWhere(...$args); |
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* @method Select orWhere(...$args); |
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* @method Select having(...$args); |
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* @method Select andHaving(...$args); |
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* @method Select orHaving(...$args); |
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* @method Select orderBy($expression, $direction = 'ASC'); |
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* @method mixed avg($identifier) Perform aggregation (AVG) based on column or expression value. |
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* @method mixed min($identifier) Perform aggregation (MIN) based on column or expression value. |
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* @method mixed max($identifier) Perform aggregation (MAX) based on column or expression value. |
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* @method mixed sum($identifier) Perform aggregation (SUM) based on column or expression value. |
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*/ |
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final class Select implements IteratorAggregate, Countable, PaginableInterface |
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{ |
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// load relation data within same query |
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public const SINGLE_QUERY = JoinableLoader::INLOAD; |
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// load related data after the query |
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public const OUTER_QUERY = JoinableLoader::POSTLOAD; |
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/** @var ORMInterface @internal */ |
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private $orm; |
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/** @var RootLoader */ |
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private $loader; |
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/** @var QueryBuilder */ |
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private $builder; |
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/** |
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* @param ORMInterface $orm |
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* @param string $role |
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*/ |
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public function __construct(ORMInterface $orm, string $role) |
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{ |
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$this->orm = $orm; |
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$this->loader = new RootLoader($orm, $this->orm->resolveRole($role)); |
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$this->builder = new QueryBuilder($this->loader->getQuery(), $this->loader); |
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} |
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/** |
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* Remove nested loaders and clean ORM link. |
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*/ |
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public function __destruct() |
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{ |
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$this->orm = null; |
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$this->loader = null; |
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$this->builder = null; |
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} |
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/** |
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* Bypassing call to primary select query. |
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* |
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* @param string $name |
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* @param array $arguments |
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* |
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* @return mixed|Select |
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*/ |
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public function __call(string $name, array $arguments) |
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{ |
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if (in_array(strtoupper($name), ['AVG', 'MIN', 'MAX', 'SUM', 'COUNT'])) { |
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// aggregations |
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return $this->builder->withQuery( |
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$this->loader->buildQuery() |
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)->__call($name, $arguments); |
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} |
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$result = $this->builder->__call($name, $arguments); |
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if ($result instanceof QueryBuilder) { |
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return $this; |
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} |
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return $result; |
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} |
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/** |
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* Cloning with loader tree cloning. |
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* |
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* @attention at this moment binded query parameters would't be cloned! |
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*/ |
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public function __clone() |
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{ |
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$this->loader = clone $this->loader; |
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$this->builder = new QueryBuilder($this->loader->getQuery(), $this->loader); |
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} |
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/** |
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* @deprecated Will be dropped in next major release. Use {@see scope()} instead. |
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*/ |
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public function constrain(ConstrainInterface $constrain = null): self |
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{ |
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return $this->scope($constrain); |
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} |
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/** |
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* Create new Selector with applied scope. By default no scope used. |
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*/ |
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public function scope(ScopeInterface $scope = null): self |
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{ |
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$this->loader->setScope($scope); |
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return $this; |
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} |
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/** |
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* Get Query proxy. |
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* |
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* @return QueryBuilder |
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*/ |
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public function getBuilder(): QueryBuilder |
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{ |
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return $this->builder; |
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} |
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/** |
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* Compiled SQL query, changes in this query would not affect Selector state (but binded parameters will). |
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* |
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* @return SelectQuery |
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*/ |
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public function buildQuery(): SelectQuery |
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{ |
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return $this->loader->buildQuery(); |
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} |
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/** |
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* Shortcut to where method to set AND condition for entity primary key. |
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* |
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* @param int|string $id |
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* |
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* @return $this|Select |
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*/ |
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public function wherePK($id): self |
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{ |
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return $this->__call('where', [$this->loader->getPK(), $id]); |
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} |
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/** |
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* Attention, column will be quoted by driver! |
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* |
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* @param string|null $column When column is null PK or DISTINCT(PK) will be generated. |
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* |
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* @return int |
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*/ |
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public function count(string $column = null): int |
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{ |
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return (int) $this->__call('count', [$column ?? $this->loader->getCountField()]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function limit(int $limit): self |
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{ |
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$this->loader->getQuery()->limit($limit); |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function offset(int $offset): self |
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{ |
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$this->loader->getQuery()->offset($offset); |
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return $this; |
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} |
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/** |
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* Request primary selector loader to pre-load relation name. Any type of loader can be used |
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* for data pre-loading. ORM loaders by default will select the most efficient way to load |
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* related data which might include additional select query or left join. Loaded data will |
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* automatically pre-populate record relations. You can specify nested relations using "." |
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* separator. |
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* |
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* Examples: |
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* |
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* // Select users and load their comments (will cast 2 queries, HAS_MANY comments) |
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* User::find()->with('comments'); |
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* |
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* // You can load chain of relations - select user and load their comments and post related to |
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* //comment |
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* User::find()->with('comments.post'); |
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* |
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* // We can also specify custom where conditions on data loading, let's load only public |
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* // comments. |
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* User::find()->load('comments', [ |
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* 'where' => ['{@}.status' => 'public'] |
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* ]); |
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* |
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* Please note using "{@}" column name, this placeholder is required to prevent collisions and |
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* it will be automatically replaced with valid table alias of pre-loaded comments table. |
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* |
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* // In case where your loaded relation is MANY_TO_MANY you can also specify pivot table |
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* // conditions, let's pre-load all approved user tags, we can use same placeholder for pivot |
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* // table alias |
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* User::find()->load('tags', [ |
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* 'wherePivot' => ['{@}.approved' => true] |
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* ]); |
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* |
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* // In most of cases you don't need to worry about how data was loaded, using external query |
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* // or left join, however if you want to change such behaviour you can force load method to |
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* // INLOAD |
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* User::find()->load('tags', [ |
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* 'method' => Loader::INLOAD, |
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* 'wherePivot' => ['{@}.approved' => true] |
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* ]); |
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* |
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* Attention, you will not be able to correctly paginate in this case and only ORM loaders |
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* support different loading types. |
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* |
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* You can specify multiple loaders using array as first argument. |
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* |
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* Example: |
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* User::find()->load(['posts', 'comments', 'profile']); |
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* |
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* Attention, consider disabling entity map if you want to use recursive loading (i.e |
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* post.tags.posts), but first think why you even need recursive relation loading. |
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* |
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* @param array|string $relation |
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* @param array $options |
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* |
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* @return $this|self |
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* |
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* @see with() |
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*/ |
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public function load($relation, array $options = []): self |
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{ |
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if (is_string($relation)) { |
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$this->loader->loadRelation($relation, $options, false, true); |
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return $this; |
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} |
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foreach ($relation as $name => $subOption) { |
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if (is_string($subOption)) { |
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// array of relation names |
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$this->load($subOption, $options); |
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} else { |
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// multiple relations or relation with addition load options |
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$this->load($name, $subOption + $options); |
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} |
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} |
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return $this; |
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} |
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/** |
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* With method is very similar to load() one, except it will always include related data to |
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* parent query using INNER JOIN, this method can be applied only to ORM loaders and relations |
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* using same database as parent record. |
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* |
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* Method generally used to filter data based on some relation condition. Attention, with() |
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* method WILL NOT load relation data, it will only make it accessible in query. |
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* |
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* By default joined tables will be available in query based on relation name, you can change |
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* joined table alias using relation option "alias". |
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* |
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* Do not forget to set DISTINCT flag while including HAS_MANY and MANY_TO_MANY relations. In |
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* other scenario you will not able to paginate data well. |
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* |
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* Examples: |
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* |
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* // Find all users who have comments comments |
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* User::find()->with('comments'); |
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* |
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* // Find all users who have approved comments (we can use comments table alias in where |
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* statement). User::find()->with('comments')->where('comments.approved', true); |
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* |
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* // Find all users who have posts which have approved comments |
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* User::find()->with('posts.comments')->where('posts_comments.approved', true); |
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* |
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* // Custom join alias for post comments relation |
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* $user->with('posts.comments', [ |
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* 'as' => 'comments' |
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* ])->where('comments.approved', true); |
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* |
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* // If you joining MANY_TO_MANY relation you will be able to use pivot table used as relation |
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* // name plus "_pivot" postfix. Let's load all users with approved tags. |
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* $user->with('tags')->where('tags_pivot.approved', true); |
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* |
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* // You can also use custom alias for pivot table as well |
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* User::find()->with('tags', [ |
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* 'pivotAlias' => 'tags_connection' |
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* ]) |
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* ->where('tags_connection.approved', false); |
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* |
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* You can safely combine with() and load() methods. |
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* |
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* // Load all users with approved comments and pre-load all their comments |
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* User::find()->with('comments')->where('comments.approved', true)->load('comments'); |
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* |
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* // You can also use custom conditions in this case, let's find all users with approved |
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* // comments and pre-load such approved comments |
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* User::find()->with('comments')->where('comments.approved', true) |
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* ->load('comments', [ |
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* 'where' => ['{@}.approved' => true] |
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* ]); |
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* |
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* // As you might notice previous construction will create 2 queries, however we can simplify |
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* // this construction to use already joined table as source of data for relation via "using" |
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* // keyword |
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* User::find()->with('comments') |
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* ->where('comments.approved', true) |
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* ->load('comments', ['using' => 'comments']); |
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* |
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* // You will get only one query with INNER JOIN, to better understand this example let's use |
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* // custom alias for comments in with() method. |
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* User::find()->with('comments', ['as' => 'commentsR']) |
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* ->where('commentsR.approved', true) |
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* ->load('comments', ['using' => 'commentsR']); |
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* |
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* @param array|string $relation |
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* @param array $options |
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* |
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* @return $this|Select |
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* |
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* @see load() |
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*/ |
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public function with($relation, array $options = []): self |
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{ |
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if (is_string($relation)) { |
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$this->loader->loadRelation($relation, $options, true, false); |
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return $this; |
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} |
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foreach ($relation as $name => $subOption) { |
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if (is_string($subOption)) { |
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//Array of relation names |
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$this->with($subOption, []); |
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} else { |
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//Multiple relations or relation with addition load options |
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$this->with($name, $subOption); |
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} |
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} |
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return $this; |
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} |
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/** |
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|
|
* Find one entity or return null. Method provides the ability to configure custom query |
373
|
|
|
* parameters. Attention, method does not set a limit on selection (to avoid underselection of |
374
|
|
|
* joined tables), make sure to set the constrain in the query. |
375
|
|
|
* |
376
|
|
|
* @param array|null $query |
377
|
|
|
* |
378
|
|
|
* @return object|null |
379
|
|
|
*/ |
380
|
|
|
public function fetchOne(array $query = null) |
381
|
|
|
{ |
382
|
|
|
$data = (clone $this)->where($query)->limit(1)->fetchData(); |
383
|
|
|
|
384
|
|
|
if (!isset($data[0])) { |
385
|
|
|
return null; |
386
|
|
|
} |
387
|
|
|
|
388
|
|
|
return $this->orm->make( |
389
|
|
|
$this->loader->getTarget(), |
390
|
|
|
$data[0], |
391
|
|
|
Node::MANAGED |
392
|
|
|
); |
393
|
|
|
} |
394
|
|
|
|
395
|
|
|
/** |
396
|
|
|
* Fetch all records in a form of array. |
397
|
|
|
* |
398
|
|
|
* @return object[] |
399
|
|
|
*/ |
400
|
|
|
public function fetchAll(): array |
401
|
|
|
{ |
402
|
|
|
return iterator_to_array($this->getIterator()); |
403
|
|
|
} |
404
|
|
|
|
405
|
|
|
/** |
406
|
|
|
* @return Iterator |
407
|
|
|
*/ |
408
|
|
|
public function getIterator(): Iterator |
409
|
|
|
{ |
410
|
|
|
return new Iterator( |
411
|
|
|
$this->orm, |
412
|
|
|
$this->loader->getTarget(), |
413
|
|
|
$this->fetchData() |
414
|
|
|
); |
415
|
|
|
} |
416
|
|
|
|
417
|
|
|
/** |
418
|
|
|
* Load data tree from database and linked loaders in a form of array. |
419
|
|
|
* |
420
|
|
|
* @return array |
421
|
|
|
*/ |
422
|
|
|
public function fetchData(): array |
423
|
|
|
{ |
424
|
|
|
$node = $this->loader->createNode(); |
425
|
|
|
$this->loader->loadData($node); |
426
|
|
|
|
427
|
|
|
return $node->getResult(); |
428
|
|
|
} |
429
|
|
|
|
430
|
|
|
/** |
431
|
|
|
* Compiled SQL statement. |
432
|
|
|
* |
433
|
|
|
* @return string |
434
|
|
|
*/ |
435
|
|
|
public function sqlStatement(): string |
436
|
|
|
{ |
437
|
|
|
return $this->buildQuery()->sqlStatement(); |
438
|
|
|
} |
439
|
|
|
} |
440
|
|
|
|