[Product-Developers] Re: Problem with ordering of objects from a new product

[Eric Steele]

I just wanted to post a follow-up for the benefit of anyone running into 
this in the future. It all wound up being caused by undefined/misdefined 
meta_types. The moveObjectsByDelta method of OrderedBaseFolder calls 
getCMFObjectsSubsetIds and since the objects were returning the wrong 
meta_types, it wasn't able to find them. It was a simple, but unobvious 
fix. See https://weblion.psu.edu/trac/weblion/ticket/414 for more details.

Eric


cewing wrote:
> Greetings,
> 
> I am working on a product that adds several new content types.  All the
> functionality associated with these types is working reasonably well, but I
> am having an odd problem.  When you add an object of one of the types to an
> ordered folder in plone (like, perhaps, the root of the plone site), it
> cannot be moved from its position.
> 
> I can drag-and-drop the item to a new position in the folder-contents view,
> but upon leaving that view, the order of the object remains unchanged, it
> returns to where it was before.
> 
> I can also click on the up/down arrows in the 'order' column of the
> folder-contents view, and the view reloads with the portal message 'Item's
> position has changed', but the position has not changed.
> 
> Reloading the browser with a cache-dump fails to make any difference, so the
> issue isn't cached views.
> 
> All other plone content types, including those added by other products
> continue to work as expected, so the problem doesn't appear to be with
> ordered folder support in general.
> 
> There are no error messages that show up when running in debug mode or under
> zopectl fg.  Nothing appears to be failing, it just doesn't work. 
> 
> Is there some interface or inheritance that a content type has that allows
> it to be ordered?  My understanding was that order of objects in an ordered
> folder is a property of the folder, not the objects themselves.  Perhaps I
> am wrong.
> 
> Any ideas on what might be causing this problem, or how to fix it? 
> 
> Apologies for cross-posting.  I asked this question in plone-users a few
> days ago and have been met with resounding silence.
> 
> Cris