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<?php |
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/** |
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* This file is part of Hydrogen package. |
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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 RDS\Hydrogen\Processor\DatabaseProcessor; |
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use Doctrine\ORM\QueryBuilder; |
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use RDS\Hydrogen\Criteria\Common\Field; |
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use RDS\Hydrogen\Criteria\CriterionInterface; |
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use RDS\Hydrogen\Criteria\Relation; |
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/** |
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* Class RelationBuilder |
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*/ |
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class RelationBuilder extends WhereBuilder |
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{ |
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/** |
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* @var array |
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*/ |
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private $relations = []; |
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/** |
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* @param QueryBuilder $builder |
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* @param CriterionInterface|Relation $relation |
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* @return \Generator |
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*/ |
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public function apply($builder, CriterionInterface $relation): \Generator |
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{ |
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$field = $relation->getField(); |
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$alias = $relation->getAlias(); |
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foreach ($field->getChunks() as $chunk) { |
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if (isset($this->relations[$chunk])) { |
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$alias = $this->relations[$chunk]; |
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continue; |
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} |
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$alias = $this->join($builder, $chunk, $alias); |
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$this->relations[$chunk] = $alias; |
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} |
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yield $relation->getQuery()->withAlias($alias); |
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} |
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/** |
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* @param QueryBuilder $builder |
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* @param string $child |
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* @param string $parent |
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* @return string |
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*/ |
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private function join(QueryBuilder $builder, string $child, string $parent): string |
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{ |
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$relation = Field::new($child)->withAlias($parent); |
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$alias = \str_replace('.', '_', $relation->toString()); |
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$builder->leftJoin($relation->toString(), $alias); |
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$builder->addSelect($alias); |
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return $alias; |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: