Does anyone have a hint for this (or an idea of where to get started in the documentation)? This seems relatively simple so my best guess is that there is something that I am just missing.
Thanks! -- Casey On 07/22/2010 10:16 AM, Casey S. Greene wrote:
I am trying to figure out a reasonable way to filter using a queryset within a ModelForm. In a simple example, I have three models (A, B, and C). C has many A and B A and B have a many to many relationship. Assume that some instances of C and instances of B already exist. I am using the create_object generic view to allow users to create instances of A but not to select associated Bs. I'm then using update_object generic view to allow users to select the Bs associated with A. I've created a class that inherits from forms.ModelForm that defines the form. In that I have forms.ModelMultipleChoiceField() for selecting associated Bs. What I want to do is use the queryset to filter to only show those Bs that share C with this instance of A. I am confused as to how to do this type of query while passing a form_class from the update_object generic view. I have tried doing this in __init__() but I get a TypeError that the form is not callable when I try to pass arguments. Thanks in advance for your help and time, -- Casey
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