hasOne(AppointmentCategoryLang::class,'cat_id')->where(['lang' => get_default_language()]); } public function lang_front(){ return $this->hasOne(AppointmentCategoryLang::class,'cat_id')->where(['lang' => get_user_lang()]); } public function lang_all(){ return $this->hasMany(AppointmentCategoryLang::class,'cat_id'); } }