Monday, April 29, 2013

AttributeError: 'AlumniResponseFormFormSet' object has no attribute 'new_objects'

I'm using the Django admin and trying to make some changes to a related object that is mapped as anInlineModelAdmin object. I'm trying to do this using the save_related(self, request, form, formsets, change) method that Django provides. When I try to save something, I get an error:

AttributeError: 'AlumniResponseFormFormSet' object has no attribute 'new_objects'

Other Info:

1) I have two InlineModelAdmins
2) I'm not saving the AlumniResponseInline when this error occurs. I'm saving another InlineModelAdmin associated with the same parent model
3) Until I added the save_related() method, I wasn't having problems saving either InlineModelAdmin
4) This error is happening after all my code is executed in save_related(), so I don't have control over catching that exception

From the documentation on save_related():

The save_related method is given the HttpRequest, the parent ModelForm instance, the list of inline formsets and a boolean value based on whether the parent is being added or changed. Here you can do any pre- or post-save operations for objects related to the parent. Note that at this point the parent object and its form have already been saved.

Thanks for your time!  

Brian Dant

PS:  I crossed posted this from SO, where I wasn't getting much traction.  I realized that this is probably more of a Django Admin detail, so y'all might know better :D


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