yii2: Proper way to throw new exception

Question

Just for testing I have added this code in my model while setting the debug = true and false.

if($packagedays < 1)
     {
      throw new \yii\base\Exception( "package days cannot be less than 1" );
     }

Now when Yii debug is true: I am getting

Exception – yii\base\Exception package days cannot be less than 1

But when I am setting the debug to false I am getting Exception An internal server error occurred.

The above error occurred while the Web server was processing your request.

What I want is to replace the An internal server error occurred. with package days cannot be less than 1 when debug=false

What I am missing here?

Thanks.

Solution

You should simply throw a UserException :

UserException is the base class for exceptions that are meant to be shown to end users.

Read more : http://www.yiiframework.com/doc-2.0/yii-base-userexception.html