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<?php |
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declare(strict_types=1); |
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namespace Cycle\ORM\Select\Traits; |
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use Cycle\ORM\Exception\LoaderException; |
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use Cycle\ORM\Select\AbstractLoader; |
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use Cycle\ORM\Select\LoaderInterface; |
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/** |
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* @internal |
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*/ |
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trait ChainTrait |
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{ |
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abstract public function loadRelation( |
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string|LoaderInterface $relation, |
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array $options, |
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bool $join = false, |
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bool $load = false, |
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): LoaderInterface; |
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/** |
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* Check if given relation points to the relation chain. |
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*/ |
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4082 |
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protected function isChain(string $relation): bool |
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{ |
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return \str_contains($relation, '.'); |
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} |
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/** |
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* @param array $options Final loader options. |
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* @param bool $join See loadRelation(). |
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* |
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* @throws LoaderException When one of the elements can not be chained. |
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* |
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* @see joinRelation() |
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* @see loadRelation() |
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*/ |
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protected function loadChain(string $chain, array $options, bool $join, bool $load): LoaderInterface |
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{ |
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$position = \strpos($chain, '.'); |
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// chain of relations provided (relation.nestedRelation) |
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$child = $this->loadRelation(\substr($chain, 0, $position), [], $join, $load); |
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if (!$child instanceof AbstractLoader) { |
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throw new LoaderException( |
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\sprintf('Loader `%s` does not support chain relation loading.', $child::class), |
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); |
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} |
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// load nested relation through chain (chainOptions prior to user options) |
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return $child->loadRelation(\substr($chain, $position + 1), $options, $join, $load); |
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} |
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} |
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cycle /
orm
