#12213: Initial data and addition queryset_filter for formset from
inlineformset_factory
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          Reporter:  ramusus     |         Owner:  nobody
            Status:  new         |     Milestone:        
         Component:  Forms       |       Version:  1.1  
        Resolution:              |      Keywords:        
             Stage:  Unreviewed  |     Has_patch:  1    
        Needs_docs:  0           |   Needs_tests:  1    
Needs_better_patch:  0           |  
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Changes (by lorochka85):

  * component:  Uncategorized => Forms

Comment:

 Queryset support was added to !BaseInlineFormSet (not initial though) in
 the development version and, imho, is better than dealing with filters.
 For initial, adding it as an extra argument to !BaseInlineFormset and then
 passing to the super's {{{ __init__ }}} does the job.

 However, it gets a little bit confusing when one tries to pass both
 initial and queryset to ether !BaseInlineFormSet or !BaseModelFormSet. For
 example, you have something like:

 {{{
 formset = BaseModelFormSet(...,
                            queryset=some_qs,
                            initial=[{'field1': 'f1value1', 'field2':
 'f2value1'},
                                     {'field1': 'f1value2', 'field2':
 'f2value2'}],
                           )
 }}}
 then values for field1 and field2 for the first 2 items in some_qs will
 get overriden with values in initial. In order for the formset to display
 first data from the queryset and then extra forms with values from
 initial, your initial should look something like:
 {{{
 initial = [{} for i in range(0, some_qs.count())] +
           [{'field1': 'f1value1', 'field2': 'f2value1'},
            {'field1': 'f1value2', 'field2': 'f2value2'}]
 }}}

 ...Having said all that, there is a nice little comment about instance and
 initial in {{{ BaseModelForm.__init__ }}}:
 [http://code.djangoproject.com/browser/django/trunk/django/forms/model...]
 {{{
 # if initial was provided, it should override the values from instance
 }}}
 I suppose this is valid for formsets as well. Should that be documented
 somewhere?

 Now, in terms of use cases for initial on InlineFormSet, there is one by
 Nathan in this thread: [http://groups.google.ru/group/django-
 developers/browse_thread/thread/73af9e58bd7626a8/e307d4865759a26e]

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Ticket URL: <http://code.djangoproject.com/ticket/12213#comment:3>
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