Cant how dropdown icon Using Model Filter search


I cant Show drop down icon using model filter search function in bootstrap.widgets.TbGridView,filter working fine but cant show that drop down icon,

why?Any Class Added before that widgets.

In your TbGridView colum you set attribute with dropdown filter so:


    'name' => 'attribute_of_model',

    'filter' => [ 'key_1' => 'value_1', 'key_2' => 'value_2', ... ]   


filter is an array where ‘key’ is value’s attribute and ‘value’ is text’s content of html select to be generated.