php - Getting value of joined table Yii 2 -

hello trying access value joined table schead.section store in subjectcontainer.section, using scstock data section part located in schead.section did join schead , schstock can have access section column. here did.

     $subject = activecurriculum::find()           ->select('scstock.*')           ->leftjoin('schead', 'schead.trno = scstock.trno')           ->where([ 'schead.trno' => $trno])           ->one();      $activesubject = new activesubject();     $activesubject->clientid = $clientid;     $activesubject->trno = $subject->trno;     $activesubject->subjectcode = $subject->subjectcode;     $activesubject->schedday = $subject->schedday;     $activesubject->schedtime = $subject->schedtime;     $activesubject->section = $subject->section;     $activesubject->room = $subject->room;     $activesubject->units = $subject->units;     $activesubject->save(); //reduces slot of ccsubject 1      $subject->slots = $subject->slots - 1;      //never forget saving part      $subject->save(); 

first $subject access sctock table join schead via trno. $activesubject access subjectcontainer table store values in. problem getting error.

can me in trying solve this?

make sure define relation schead object in model. example of such relation:

/**  * @property $schead schead  */ class yourmodel extends \yii\db\activerecord {     /**      * @return schead      */     public function getschead()     {         return $this->hasone(schead::classname(), ['field1' => 'field2']);     } } 

also, $subject->schead.section wrong way of accessing related model attributes. use $subject->schead->section instead. if having schead optional, don't forget check existence of related object first, example:

$subject->schead ? $subject->schead->section : null 

also check code typos (probably sched / schead?). can read more working relations in official docs.