JITModel.php

<?php
namespace App\Models;
use LogicException;
use Illuminate\Database\Eloquent\Relations\Relation;
use Illuminate\Database\Eloquent\Collection;
abstract class JitModel extends \Illuminate\Database\Eloquent\Model
{
    protected $parentCollection = null;

    /**
     * Load a relationship based on the method provided
     *
     * @param string $method The method name to load
     *
     * @return mixed
     */
    public function getRelationshipFromMethod($method)
    {
        $relations = $this->$method();
        if ($this->parentCollection && count($this->parentCollection) > 1) {
            $this->parentCollection->load($method);
        }
        if (!$relations instanceof Relation) {
            throw new LogicException('Relationship method must return an object of type '
                . 'Illuminate\Database\Eloquent\Relations\Relation');
        }
        return $this->relations[$method] = $relations->getResults();
    }
    /**
     * Create a new Eloquent Collection instance.
     *
     * @param array $models Array of models to create collection from
     *
     * @return \Illuminate\Database\Eloquent\Collection
     */
    public function newCollection(array $models = [])
    {
        $collection = new Collection($models);
        foreach ($collection as &$model) {
            $model->parentCollection = $collection;
        }
        return $collection;
    }
}