frontend\modules\tweet\models\Tweet::rules PHP Method

    public function rules()
    {
        return [[['content'], 'required'], [['post_meta_id', 'user_id', 'view_count', 'comment_count', 'favorite_count', 'like_count', 'thanks_count', 'hate_count', 'status', 'order', 'created_at', 'updated_at'], 'integer'], [['content'], 'string', 'min' => 3, 'max' => 500], [['post_meta_id'], 'default', 'value' => 0], [['title'], 'default', 'value' => '']];
    }