Yii Cgridview how to render in view 2 or more values from the same table in 1 column

Question

I have a Cgridview that has multiple columns. I would like to merge and render the values of 3 columns in 1 column.

 <?php $this->widget('zii.widgets.grid.CGridView', array(
'id'=>'policy-grid',
'dataProvider'=>$dataProvider,
'filter'=>$dataProvider->model,

'selectableRows'   => 1, // you can select only 1 row!!
'selectionChanged'=>'function(id){ var objectId = $.fn.yiiGridView.getSelection(id); 
 if (isNaN(objectId) || objectId == ""){return;} location.href = 
"'.$this->createUrl('policy/view').'&id="+$.fn.yiiGridView.getSelection(id);}',
'htmlOptions'=>array('class'=>'grid-view grid_pointer',),

 'columns'=>array(

  array(
       'name'        => 'compliance',
     'type'        => 'html',
     'value'       => '$data->status == "ACTIVE" ? (CHtml::image($data->compliance == 
    "SUFFICIENT" ? "images/policy_sufficient.png" : "images/policy_insufficient.png")) 
    : "N/A" ',
     'filter'      => VFFormUtil::getFilter(VFFormUtil::POLICY_COMPLIANCE),
     'htmlOptions' => array('style'=>'text-align: center'),
  ),

  array(
       'name'        => 'status',
     'filter'      => VFFormUtil::getFilter(VFFormUtil::ACTIVE_INACTIVE),
     'htmlOptions' => array('style'=>'text-align: center'),
  ),

  array(          

      'name'        => 'coverage_left',
      'htmlOptions' => array('style'=>'text-align: center'),
  ),

  array(
      'name' => 'model_year', 
      'htmlOptions' => array('style'=>'text-align: center'), 
  ),
  'make',
  'model',

How would I combine 'model_year','make' and 'model', into 1 column in the views?

Answer 1

The correct way would be to create a new property variable in the model, and join the values afterFind().

See How to have multiple fields (D/M/Y) for single date property in Yii?, but you have to swap the find and save functions, as that user wants to do the opposite (split single column into three fields instead).