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<?php
namespace Illuminate\Database\Eloquent\Relations\Concerns;
use Illuminate\Contracts\Database\Eloquent\SupportsPartialRelations;
use Illuminate\Database\Eloquent\Model;
trait ComparesRelatedModels
{
/**
* Determine if the model is the related instance of the relationship.
*
* @param \Illuminate\Database\Eloquent\Model|null $model
* @return bool
*/
public function is($model)
{
$match = ! is_null($model) &&
$this->compareKeys($this->getParentKey(), $this->getRelatedKeyFrom($model)) &&
$this->related->getTable() === $model->getTable() &&
$this->related->getConnectionName() === $model->getConnectionName();
if ($match && $this instanceof SupportsPartialRelations && $this->isOneOfMany()) {
return $this->query
->whereKey($model->getKey())
->exists();
}
return $match;
}
/**
* Determine if the model is not the related instance of the relationship.
*
* @param \Illuminate\Database\Eloquent\Model|null $model
* @return bool
*/
public function isNot($model)
{
return ! $this->is($model);
}
/**
* Get the value of the parent model's key.
*
* @return mixed
*/
abstract public function getParentKey();
/**
* Get the value of the model's related key.
*
* @param \Illuminate\Database\Eloquent\Model $model
* @return mixed
*/
abstract protected function getRelatedKeyFrom(Model $model);
/**
* Compare the parent key with the related key.
*
* @param mixed $parentKey
* @param mixed $relatedKey
* @return bool
*/
protected function compareKeys($parentKey, $relatedKey)
{
if (empty($parentKey) || empty($relatedKey)) {
return false;
}
if (is_int($parentKey) || is_int($relatedKey)) {
return (int) $parentKey === (int) $relatedKey;
}
return $parentKey === $relatedKey;
}
}