jaredtking / pulsar

src/Relation/BelongsTo.php

<?php

/**
 * @author Jared King <j@jaredtking.com>
 *
 * @see http://jaredtking.com
 *
 * @copyright 2015 Jared King
 * @license MIT
 */

namespace Pulsar\Relation;

use Pulsar\Model;
use Pulsar\Query;

/**
 * Represents a belongs-to relationship.
 */
final class BelongsTo extends AbstractRelation
{
    protected function initQuery(Query $query): Query

This method seems to be duplicated in your project.

    {
        $id = $this->localModel->{$this->localKey};

        if (null === $id) {
            $this->empty = true;
        }

        $query->where($this->foreignKey, $id)
            ->limit(1);

        return $query;
    }

    public function getResults()
    {
        $query = $this->getQuery();
        if ($this->empty) {
            return null;
        }

        return $query->first();
    }

    public function save(Model $model): Model
    {
        $model->saveOrFail();
        $this->attach($model);

        return $model;
    }

    public function create(array $values = []): Model
    {
        $class = $this->foreignModel;
        $model = new $class();
        $model->create($values);

        $this->attach($model);

        return $model;
    }

    /**
     * Attaches this model to an owning model.
     *
     * @param Model $model owning model
     *
     * @return $this
     */
    public function attach(Model $model)
    {
        $this->localModel->{$this->localKey} = $model->{$this->foreignKey};
        $this->localModel->saveOrFail();

        return $this;
    }

    /**
     * Detaches this model from the owning model.
     *
     * @return $this
     */
    public function detach()
    {
        $this->localModel->{$this->localKey} = null;
        $this->localModel->saveOrFail();

        return $this;
    }
}