immediate_view, or how I learnt to stop worrying and started loving the subtle breakage

So....

You've done this, haven't you?

class MyType(BaseContent):
   ....
   default_view = immediate_view = 'my_template'
   ...

well ... you were *WRONG*. :)

immediate_view is part of the FTI in CMF. It is the view that you see  
immediately after an object is created. That is - it's the "add form"  
(except the object already exists, whether in the factory or not), and  
should in most cases be base_edit, not base_view.

We want to fix this for Plone 2.5  
(https://dev.plone.org/plone/ticket/3965) because it solves a few use  
cases that are tricky otherwise, e.g. if you need a different form to  
initialise something when it's first created from the basic edit form.

However, Archetypes does this wrong, ATContentTypes does this wrong. And a  
lot of the documentation does this wrong.

For example:

  - TemplateMixin uses immediate_view as a fallback if it can't find the  
default_view (of course, TemplateMixin itself is a poor alternative to  
BrowserDefaultMixin, I wonder if anyone actually uses it).

  - All of ATContentTypes' content types (base.py, document.py, file.py  
etc.) have default_view == immediate_view

  = The ATCT docs/ExtendingType.txt promotes the default_view ==  
immediate_view misconception

  - PloneFolder.py gets it wrong, setting immediate_view = folder_listing

  - Various things in the plone GenericSetup profiles get it wrong

  - ArchetypeTool actually gets it right in the base FTI, but products can  
obviously override this very easily.

  - CMF's stock types obviously get it right

So ... what shall we do?

  - Break people who got it wrong in the past (it's obviously a simple fix,  
but it may piss people off)?

  - Use immediate_view only if immediate_view is not the same as  
default_view?

  - Live without this feature and admit we misunderstood?

Martin
-- 
(muted)



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