[wp-trac] [WordPress Trac] #14724: manage_$(taxonomy)_custom_column limits plugin interaction

[WordPress Trac]

#14724: manage_$(taxonomy)_custom_column limits plugin interaction
--------------------------+-------------------------------------------------
 Reporter:  nerrad        |       Owner:                 
     Type:  defect (bug)  |      Status:  new            
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Taxonomy      |     Version:                 
 Severity:  normal        |    Keywords:                 
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 Having trouble coming up with a descriptive title.

 Here's the problem:

 I have one plugin that creates a custom taxonomy ('series') and I can
 populate the new column on the 'edit-tags?taxonomy=series' page fine
 (named 'icon').  For this plugin I use the 'manage_series_custom_column'
 filter to add in the content for that column. For example:

 {{{
 add_filter('manage_series_custom_column','my_first_plugin_column',1,3)
 function my_first_plugin_column($unknown, $column_name, $id) {
     if ($column_name == 'icon') {
        $data = get_some_data();
        $return $data;
     }
 }
 }}}

 This works as expected and I see the column 'Series' with it's content.

 Here's the problem.  I've created an "addon" for my original plugin that
 also hooks into the table on the 'edit-tags.php?taxonomy=series' page.
 I've successfully created the "group" column and it sets up the column
 correctly.  Then I hook into the custom column filter like so:

 {{{
 add_filter('manage_series_custom_column','my_second_plugin_column',1,3)
 function my_second_plugin_column($unknown, $column_name, $id) {
     if ( $column_name == 'group' ) {
        $data = get_some_data();
        $return $data;
    }
 }
 }}}

 The PROBLEM is that the data for the second plugin DOES NOT display.
 Funny thing is when I do a var_dump on the data it is there.  But somehow
 it's getting lost in the apply_filter() routine.  I've also tried playing
 around with the priority.  Whichever custom_column is given the higher
 priority is the one that will display and the other one won't.

 Am I missing something?

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Ticket URL: <http://core.trac.wordpress.org/ticket/14724>
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