php - Yii - Saving Data between 3 tables -

i working yii , jquery mobile. have 3 tables: users, projects , shareprojects. have been able create function display shared projects user, struggling assign users projects. have tried code have been unsuccessful far.

public function actionshareprojects() {      $model=new sharedprojects;    if(isset($_post['sharedprojects'])) {       $model->attributes=$_post['sharedprojects'];       $model->project_id = "project_id";       $model->user_id = "user_id";       $model->sharedproject_id = "";       $model->sharedcreatedate= date('y-m-d g:i:s');       if($model->save()) {          echo json_encode(array('action'=>'success', 'message'=>''));       } else {           echo json_encode(array('action'=>'error', 'message'=>'incorrect'));       }    } } 

in project, there share button takes project id trying able allow user type email in user share with.

i tried inputting manually on postman failed, no errors came no data saved. used correct input:

sharedprojects [user_id]  sharedprojects [project_id]  sharedprojects [sharedproject_id] sharedprojects [sharedcreatedate] 

change code this

public function actionshareprojects() {      $model=new sharedprojects;    if (isset($_post['sharedprojects'])) {       $model->attributes=$_post['sharedprojects'];       $model->sharedcreatedate= date('y-m-d h:i:s');       if($model->save()) {          $this->sendresponse(array('action'=>'success', 'message'=>''));       } else {          $this->sendresponse(array('action'=>'error', 'message'=>'incorrect'));       }    } } 

and make sure project_id,user_id set , of int type. play around sending json response better way adding function

public function sendresponse($data) {     header('content-type: application/json; charset=utf-8');     echo cjson::encode($data);     exit; } 

in controller , calling sending response.