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POForm Validation in Admin with Inline formset and Model form
 

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  1. POForm Validation in Admin with Inline formset and Model form
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    <p>I have a model, OrderedList, which is intended to be a listing of content objects ordered by the user. The OrderedList has several attributes, including a site which it belongs to.</p> <p>The content objects are attached to it via an OrderedListRow class, which is brought into OrderedList's admin via an inline formset in the admin.</p> <pre><code>class OrderedList(GenericList): objects = models.Manager() published = GenericListManager() class OrderedListRow(models.Model): list = models.ForeignKey(OrderedList) content_type = models.ForeignKey(ContentType) object_id = models.PositiveSmallIntegerField() content_object = generic.GenericForeignKey("content_type", "object_id") order = models.IntegerField('order', blank = True, null = True) </code></pre> <p>(OrderedList inherits the site field from the larger GenericList abstract).</p> <p>Here's my problem; when the user saves the admin form, I want to verify that each content object mapped to by each OrderedListRow belongs to the same site that the OrderedList does (the list can only belong to 1 site; the content objects can belong to multiple).</p> <p>I can override OrderedList's admin form's clean(), but it doesn't include the inline formset which contains the OrderedListRows, so it can't reach that data. I can override the OrderedListRows' inline formset's clean, but it can't reach the list. I need some way within the context of form validation to reach both the OrderedList's form data and the formset's form data so I can check all the sites of the OrderedListRow's content objects against the site of the OrderedList, and throw a validation error if there's a problem. So far I haven't found a function that the cleaned data for both OrderedRow and the OrderedListRows are contained in.</p>
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