Extension crashes, when trying to use via in place of viaTable to create many-many relation

[pkolbas]

No description provided.

[beowulfenator]

Can you provide a concrete config example?

[pkolbas]

In ActiveRelationTrait.php:

public function via($relationName, callable $callable = null)
    {
        $relation = $this->primaryModel->getRelation($relationName);
        $this->via = [$relationName, $relation];
        if ($callable !== null) {
            call_user_func($callable, $relation);
        }
        return $this;
    }

and viaTable:

    public function viaTable($tableName, $link, callable $callable = null)
    {
        $relation = new ActiveQuery(get_class($this->primaryModel), [
            'from' => [$tableName],
            'link' => $link,
            'multiple' => true,
            'asArray' => true,
        ]);
        $this->via = $relation;
        if ($callable !== null) {
            call_user_func($callable, $relation);
        }

        return $this;
    }

in ManyToManyBehavior:

            // many-to-many
            if (!empty($relation->via) && $relation->multiple) {
                //Assuming junction column is visible from the primary model connection
                list($junctionTable) = array_values($relation->via->from);
                list($junctionColumn) = array_keys($relation->via->link);
                list($relatedColumn) = array_values($relation->link);

So author trying to use "via" as object, but in case of using via('relation') in place of viaTable - via as array, and application crashed.

    /**
     * @return \yii\db\ActiveQuery
     */
    public function getCategories()
    {
        return $this->hasMany(Category::className(), ['id' => 'category_id'])
            ->viaTable('page_category', ['page_id' => 'id']);
    }

works good, and

    /**
     * @return \yii\db\ActiveQuery
     */
    public function getPageCategory()
    {
        return $this->hasMany(PageCategory::className(), ['page_id' => 'id']);
    }

    /**
     * @return \yii\db\ActiveQuery
     */
    public function getCategories()
    {
        return $this->hasMany(Category::className(), ['id' => 'category_id'])
            ->via('pageCategory');
    }

crashes