*/ class HasOne extends BaseHasOne { use HasOneOrMany; /** * Get the results of the relationship. * * @return mixed */ public function getResults() { if (!is_array($this->getParentKey())) { if (is_null($this->getParentKey())) { return $this->getDefaultFor($this->parent); } } return $this->query->first() ?: $this->getDefaultFor($this->parent); } /** * Get the default value for this relation. * * @param \Illuminate\Database\Eloquent\Model $model * * @return \Illuminate\Database\Eloquent\Model|null */ protected function getDefaultFor(Model $model) { if (!$this->withDefault) { return; } $instance = $this->related->newInstance(); $foreignKey = $this->getForeignKeyName(); if (is_array($foreignKey)) { //Check for multi-columns relationship foreach ($foreignKey as $index => $key) { $instance->setAttribute($key, $model->getAttribute($this->localKey[$index])); } } else { $instance->setAttribute($foreignKey, $model->getAttribute($this->localKey)); } if (is_callable($this->withDefault)) { return call_user_func($this->withDefault, $instance) ?: $instance; } if (is_array($this->withDefault)) { $instance->forceFill($this->withDefault); } return $instance; } /** * Initialize the relation on a set of models. * * @param array $models * @param string $relation * * @return array */ public function initRelation(array $models, $relation) { foreach ($models as $model) { $model->setRelation($relation, $this->getDefaultFor($model)); } return $models; } /** * Match the eagerly loaded results to their parents. * * @param array $models * @param \Illuminate\Database\Eloquent\Collection $results * @param string $relation * * @return array */ public function match(array $models, Collection $results, $relation) { return $this->matchOne($models, $results, $relation); } /** * Make a new related instance for the given model. * * @param \Illuminate\Database\Eloquent\Model $parent * * @return \Illuminate\Database\Eloquent\Model */ public function newRelatedInstanceFor(Model $parent) { $newInstance = $this->related->newInstance(); if (is_array($this->localKey)) { //Check for multi-columns relationship $foreignKey = $this->getForeignKeyName(); foreach ($this->localKey as $index => $key) { $newInstance->setAttribute($foreignKey[$index], $parent->{$key}); } } else { return $newInstance->setAttribute($this->getForeignKeyName(), $parent->{$this->localKey}); } } }