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<?php
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namespace Illuminate\Database\Eloquent\Relations;
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use Illuminate\Contracts\Database\Eloquent\SupportsPartialRelations;
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use Illuminate\Database\Eloquent\Builder;
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use Illuminate\Database\Eloquent\Collection;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Database\Eloquent\Relations\Concerns\CanBeOneOfMany;
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use Illuminate\Database\Eloquent\Relations\Concerns\ComparesRelatedModels;
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use Illuminate\Database\Eloquent\Relations\Concerns\SupportsDefaultModels;
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use Illuminate\Database\Query\JoinClause;
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class MorphOne extends MorphOneOrMany implements SupportsPartialRelations
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{
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use CanBeOneOfMany, ComparesRelatedModels, SupportsDefaultModels;
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/**
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* Get the results of the relationship.
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*
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* @return mixed
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*/
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public function getResults()
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{
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if (is_null($this->getParentKey())) {
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return $this->getDefaultFor($this->parent);
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}
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return $this->query->first() ?: $this->getDefaultFor($this->parent);
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}
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/**
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* Initialize the relation on a set of models.
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*
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* @param array $models
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* @param string $relation
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* @return array
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*/
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public function initRelation(array $models, $relation)
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{
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foreach ($models as $model) {
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$model->setRelation($relation, $this->getDefaultFor($model));
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}
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return $models;
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}
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/**
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* Match the eagerly loaded results to their parents.
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*
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* @param array $models
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* @param \Illuminate\Database\Eloquent\Collection $results
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* @param string $relation
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* @return array
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*/
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public function match(array $models, Collection $results, $relation)
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{
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return $this->matchOne($models, $results, $relation);
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}
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/**
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* Get the relationship query.
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*
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* @param \Illuminate\Database\Eloquent\Builder $query
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* @param \Illuminate\Database\Eloquent\Builder $parentQuery
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* @param array|mixed $columns
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* @return \Illuminate\Database\Eloquent\Builder
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*/
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public function getRelationExistenceQuery(Builder $query, Builder $parentQuery, $columns = ['*'])
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{
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if ($this->isOneOfMany()) {
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$this->mergeOneOfManyJoinsTo($query);
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}
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return parent::getRelationExistenceQuery($query, $parentQuery, $columns);
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}
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/**
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* Add constraints for inner join subselect for one of many relationships.
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*
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* @param \Illuminate\Database\Eloquent\Builder $query
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* @param string|null $column
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* @param string|null $aggregate
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* @return void
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*/
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public function addOneOfManySubQueryConstraints(Builder $query, $column = null, $aggregate = null)
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{
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$query->addSelect($this->foreignKey, $this->morphType);
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}
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/**
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* Get the columns that should be selected by the one of many subquery.
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*
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* @return array|string
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*/
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public function getOneOfManySubQuerySelectColumns()
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{
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return [$this->foreignKey, $this->morphType];
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}
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/**
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* Add join query constraints for one of many relationships.
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*
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* @param \Illuminate\Database\Query\JoinClause $join
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* @return void
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*/
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public function addOneOfManyJoinSubQueryConstraints(JoinClause $join)
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{
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$join
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->on($this->qualifySubSelectColumn($this->morphType), '=', $this->qualifyRelatedColumn($this->morphType))
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->on($this->qualifySubSelectColumn($this->foreignKey), '=', $this->qualifyRelatedColumn($this->foreignKey));
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}
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/**
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* Make a new related instance for the given model.
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*
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* @param \Illuminate\Database\Eloquent\Model $parent
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* @return \Illuminate\Database\Eloquent\Model
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*/
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public function newRelatedInstanceFor(Model $parent)
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{
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return $this->related->newInstance()
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->setAttribute($this->getForeignKeyName(), $parent->{$this->localKey})
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->setAttribute($this->getMorphType(), $this->morphClass);
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}
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/**
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* Get the value of the model's foreign key.
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*
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* @param \Illuminate\Database\Eloquent\Model $model
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* @return mixed
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*/
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protected function getRelatedKeyFrom(Model $model)
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{
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return $model->getAttribute($this->getForeignKeyName());
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}
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}
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