Никита

<?php

namespace app\components;


use yii\base\Model;
use yii\db\ActiveQuery;
use yii\db\ActiveQueryInterface;
use yii\db\ActiveRecord;

class Eagerifier
{
    /**
     * @param $with
     * @param Model[] $models
     * @param bool $asArray
     * @throws \yii\base\InvalidConfigException
     */
    public static function populate($with, array &$models, $asArray = false)
    {
        $modelClass = '';
        foreach ($models as $key => $model) {
            $modelClass = $model->className();
            break;
        }

//        From ActiveQuery::findWith()
        $primaryModel = new $modelClass;
        $relations = self::normalizeRelations($primaryModel, $with);
        /* @var $relation ActiveQuery */
        foreach ($relations as $name => $relation) {
            if ($relation->asArray === null) {
                // inherit asArray from primary query
                $relation->asArray($asArray);
            }
            $relation->populateRelation($name, $models);
        }
    }

    /**
     * Adapted method from ActiveQuery
     *
     * @param ActiveRecord $model
     * @param array $with
     * @return ActiveQueryInterface[]
     */
    private static function normalizeRelations($model, $with)
    {
        $relations = [];
        foreach ($with as $name => $callback) {
            if (is_int($name)) {
                $name = $callback;
                $callback = null;
            }
            if (($pos = strpos($name, '.')) !== false) {
                // with sub-relations
                $childName = substr($name, $pos + 1);
                $name = substr($name, 0, $pos);
            } else {
                $childName = null;
            }

            if (!isset($relations[$name])) {
                $relation = $model->getRelation($name);
                $relation->primaryModel = null;
                $relations[$name] = $relation;
            } else {
                $relation = $relations[$name];
            }

            if (isset($childName)) {
                $relation->with[$childName] = $callback;
            } elseif ($callback !== null) {
                call_user_func($callback, $relation);
            }
        }

        return $relations;
    }
}