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<?php namespace Illuminate\Database\Eloquent\Relations;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;
class MorphToMany extends BelongsToMany {
/**
* The type of the polymorphic relation.
*
* @var string
*/
protected $morphType;
/**
* The class name of the morph type constraint.
*
* @var string
*/
protected $morphClass;
/**
* Indicates if we are connecting the inverse of the relation.
*
* This primarily affects the morphClass constraint.
*
* @var bool
*/
protected $inverse;
/**
* Create a new has many relationship instance.
*
* @param \Illuminate\Database\Eloquent\Builder $query
* @param \Illuminate\Database\Eloquent\Model $parent
* @param string $name
* @param string $table
* @param string $foreignKey
* @param string $otherKey
* @param string $relationName
* @param bool $inverse
* @return void
*/
public function __construct(Builder $query, Model $parent, $name, $table, $foreignKey, $otherKey, $relationName = null, $inverse = false)
{
$this->inverse = $inverse;
$this->morphType = $name.'_type';
$this->morphClass = $inverse ? get_class($query->getModel()) : get_class($parent);
parent::__construct($query, $parent, $table, $foreignKey, $otherKey, $relationName);
}
/**
* Set the where clause for the relation query.
*
* @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
*/
protected function setWhere()
{
parent::setWhere();
$this->query->where($this->table.'.'.$this->morphType, $this->morphClass);
return $this;
}
/**
* Add the constraints for a relationship count query.
*
* @param \Illuminate\Database\Eloquent\Builder $query
* @param \Illuminate\Database\Eloquent\Builder $parent
* @return \Illuminate\Database\Eloquent\Builder
*/
public function getRelationCountQuery(Builder $query, Builder $parent)
{
$query = parent::getRelationCountQuery($query, $parent);
return $query->where($this->table.'.'.$this->morphType, $this->morphClass);
}
/**
* Set the constraints for an eager load of the relation.
*
* @param array $models
* @return void
*/
public function addEagerConstraints(array $models)
{
parent::addEagerConstraints($models);
$this->query->where($this->table.'.'.$this->morphType, $this->morphClass);
}
/**
* Create a new pivot attachment record.
*
* @param int $id
* @param bool $timed
* @return array
*/
protected function createAttachRecord($id, $timed)
{
$record = parent::createAttachRecord($id, $timed);
return array_add($record, $this->morphType, $this->morphClass);
}
/**
* Create a new query builder for the pivot table.
*
* @return \Illuminate\Database\Query\Builder
*/
protected function newPivotQuery()
{
$query = parent::newPivotQuery();
return $query->where($this->morphType, $this->morphClass);
}
/**
* Create a new pivot model instance.
*
* @param array $attributes
* @param bool $exists
* @return \Illuminate\Database\Eloquent\Relations\Pivot
*/
public function newPivot(array $attributes = array(), $exists = false)
{
$pivot = new MorphPivot($this->parent, $attributes, $this->table, $exists);
$pivot->setPivotKeys($this->foreignKey, $this->otherKey);
$pivot->setMorphType($this->morphType);
return $pivot;
}
/**
* Get the foreign key "type" name.
*
* @return string
*/
public function getMorphType()
{
return $this->morphType;
}
/**
* Get the class name of the parent model.
*
* @return string
*/
public function getMorphClass()
{
return $this->morphClass;
}
}
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