symfony admin filter with join - symfony1

Question

I have a table, heading, that has an import_profile_id. import_profile has a bank_id.
On my headings list page in my admin, I'd like to add the ability to filter by bank_id. However, since heading doesn't have a bank_id - it needs to go through import_profile to get that - I can't just add a bank_id field and expect it to work.
Can anyone explain how to do this? The closest thing I've found is this post but I don't think it really addresses my issue.

Answer 1

This can be done by using virtual columns like the post you found. The virtual column is a way to add a new criteria to filter using the autogenerated filter provided by symfony. It works like this:
1 - Go to the generator.yml of the admin module and add the name of the virtual column that will create and add
<!-- apps/backend/modules/module_name/config/generator.yml -->
filter:
[virtual_column_name, and, other, filter, columns]
2 - In your lib/filter/{TableName}FormFilter.class.php (I think in your case must be HeadingFormFilter) you have to define that virtual column in the configure() method
public function configure()
{
//Type of widget (could be sfWidgetFormChoice with bank names)
$this->widgetSchema['virtual_column_name'] = new sfWidgetFormInputText(array(
'label' => 'Virtual Column Label'
));
//Type of validator for filter
$this->validatorSchema['virtual_column_name'] = new sfValidatorPass(array ('required' => false));
}
3 - Override the getFields() of that class to define it in the filter and set the filter function
public function getFields()
{
$fields = parent::getFields();
//the right 'virtual_column_name' is the method to filter
$fields['virtual_column_name'] = 'virtual_column_name';
return $fields;
}
4 - Finally you have to define the filter method. This method must be named after the add...ColumnQuery pattern, in our case must be addVirtualColumnNameColumnQuery(not a happy name choice :P), so
public function addVirtualColumnNameColumnQuery($query, $field, $value)
{
//add your filter query!
//for example in your case
$rootAlias = $query->getRootAlias();
$query->innerJoin($rootAlias . '.ImportProfile ip')
->andWhere('ip.BankId = ?', $value);
//remember to return the $query!
return $query;
}
Done! You can know filter by bank_id.