Generic foreign keys in custom m2m relationship model

[Alexandr]

In version 1.0.2 and older we can use custom table for ManyToManyField with parameter through = MyRelationModel. MyRelationModel should include foreign keys. I want to use generic foreign key as one foreign keys:

class SomeModel(models.Model):
    marks = models.ManyToManyField(to=Mark, through=MarkedItem)


class MarkedItem(models.Model):
    mark = models.ForeignKey(Mark)
    
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')

Example: content object as one of foreign keys.

But this code is't work.

[Alex Gaynor]

Marking as accepted, but this probably shouldn't use teh standard ManyToManyField

[Tobias McNulty]

This seems low priority to me because you can accomplish the same thing without a ManyToManyField by explicitly joining across your "through" model, e.g.:

class SomeModel(models.Model):
    marked_items = models.GenericRelation(MarkedItem)

some_model.marked_items.selected_related('mark')

While I don't know anything about the ManyToMany code this seems like an edge case that would add unnecessary complexity to the core

[James Bennett]

1.2 is feature-frozen, moving this feature request off the milestone.

[Aymeric Augustin]

Change UI/UX from NULL to False.

[Aymeric Augustin]

Change Easy pickings from NULL to False.

[Tim Graham]

Closing given the alternate solution described in comment 2 and a lack of interest in 6 years.