CGridView - error when object doesn't exist

Yii 1.1 General Discussion
1

I have a simple forum style discussion that you have to log in in order to post or read comments.

If you create a post or reply to a post the user id is stored with the post, so that I can identify and display the users name next to the post or comment.

It all works fine except when I delete the user, so now the post still exists but it points to a non existent user and consequently displays an error when I try to access the info in CGridView.

This is part of the view that displays the username in a column.


array(

                        'header'=>'Started By',    

			'name' => 'author',

			'type'=>'raw',

			'value' => '$data->author->username',

                        'htmlOptions'=>array(

                                            'width'=>'100px',

                                            ),

		),

‘author’ is a relation


'author' => array(self::BELONGS_TO, 'User', 'author_id')

Is there anyway that I can trap this error so that if the user has been deleted I can replace that with ‘author unknown’ or ‘user deleted’ or similar message.

The other approach would be to create a dummy user and modify all posts associated with the user when the user is deleted to now point to the dummy.

Any suggestions?

doodle

2

The value is "eval()" ed, so why not use an if statement?


array(

                        'header'=>'Started By',    

                        'name' => 'author',

                        'type'=>'raw',

                        'value' => 'isset($data->author) ? $data->author->username :"User deleted"',

                        'htmlOptions'=>array(

                                            'width'=>'100px',

                                            ),

                ),
3

Perfect!

Thank you Haensel.

doodle