Notice: Undefined index: title in panels_renderer_editor->ajax_style_type()

This seems duplicate to #1696436: Notice from editing Fieldable pane CSS styles

@nsciacca I'm seeing the same issue. I'm curious about what modules you have install and how you can reproduce this. What kind of panel panes does this affect?

Modules

Ctools 7.x-1.6
Classy Panel Styles 7.x-1.0-alpha1
Fieldable Panels Panes 7.x-1.5+36-dev
Panelizer 7.x-3.1+99-dev
Panels 7.x-3.5

Steps to reproduce:

Change the style of a Fieldable Panel Panel. The custom or Classy Panel Style must load a form to trigger the notice.

The root issue appears to be in ctools/includes/content.inc ctools_content_get_subtype() on line 192. The expected value of $subtype_id would be the FPP bundle name but the value currently is something like "fpid:157".

Specifically this block of logic starting on line 191 of ctools/includes/content.inc is never true.

$subtypes = ctools_content_get_subtypes($type);
    if (isset($subtypes[$subtype_id])) {
      $subtype = $subtypes[$subtype_id];
    }

I have a suspicion that using the UUID module when you create the FPP instance might resolve it.

So UUID does not affect this issue. The issue is the $subtypes[$subtype_id] does not exist.

$subtypes = ctools_content_get_subtypes($type);

@kepford: Which suggests that either FPP is not registering something correctly, or CTools is not loading something correctly, possibly be because FPP is not telling it to.

Tell me, is there a difference depending on whether the FPP is set to be reusable?

Bingo!!! If the FPP is reusable it is returned from ctools_content_get_subtypes($type); in the $subtypes array.

The query in the file fieldable_panels_panes/plugins/content_types/fieldable_panels_pane.inc and function fieldable_panels_panes_fieldable_panels_pane_content_type_content_types() has a WHERE clause that only returns results for reusable panes. Refactoring this query and/or function could be the solution.

Damien, I have not throughly tested this patch yet but it does resolve the notices issue for me.

OK, wrong patch file!

OK, here is the correct patch.

@kepford: did you check if this breaks the whole"reusable" concept by forcing all FPPs to be reusable?

Ok, just tested for that and it does indeed make all of the FPP's show up under miscellaneous. Back to the drawing board.

It may ultimately be a CTools limitation, I'll ping japerry about it.

So the "[modulename]_[pluginname]_content_type_content_types" function is supposed to return a list of content type plugins that are active. However, for some reason the AJAX system is using that to determine whether the pane exists and can be styled.

Looking at the code in ctools_content_get_subtype(), I wonder if maybe Fieldable Panels Panes should implement the 'content type' callback?

Based on my rough hacking on this today I think Fieldable Panels Panes should implement the 'content type' callback. Maybe basing it on ctools_entity_field_content_type_content_type().

If we add ctools_entity_field_content_type_content_type as a 'content type' callback it resolves the issue but creates another one. Editing the styles of a pane works fine but you can no longer create a new FPP. You are presented with the following message.

The pane entity referenced does not appear to be valid. It was probably deleted and you should remove this pane.