z-song / laravel-admin

                        $relation->sync($prepared[$name]);

                    }

                    break;

                case Relations\HasOne::class:

                    $related = $this->model->$name;

                    // if related is empty

                    if (is_null($related)) {

                        $related = $relation->getRelated();

                        $related->{$relation->getForeignKeyName()} = $this->model->{$this->model->getKeyName()};

                    }

                    foreach ($prepared[$name] as $column => $value) {

                        $related->setAttribute($column, $value);

                    }

                    $related->save();

                    break;

                case Relations\BelongsTo::class:

                    $parent = $this->model->$name;

                    $related->save();

                    break;

                case Relations\BelongsTo::class:

                    $parent = $this->model->$name;

                    // if related is empty

                    if (is_null($parent)) {

                        $parent = $relation->getRelated();

                    }

                    foreach ($prepared[$name] as $column => $value) {

                        $parent->setAttribute($column, $value);

                    }

                    $parent->save();

                    // When in creating, associate two models

                    if (!$this->model->{$relation->getForeignKey()}) {

                        $this->model->{$relation->getForeignKey()} = $parent->getKey();

                        $this->model->save();

                    }

                    break;

                case Relations\MorphOne::class:

                    $related = $this->model->$name;

                    if (is_null($related)) {