Mass update: add support for ManyToManyField using a "through" relation

[tdruez]

Mass update works fine on ManyToManyField using implicit relation.

Although, it the "through" relation is explicitly declared, the following error is returned on form submit:

Cannot set values on a ManyToManyField which specifies an intermediary model.

Note that the display of the Mass update form is fine, you can properly multi-select the m2m values.

Do you think we could add support for this?

Thanks.

[saxix]

should be possible to investigate the intermediary model to check for field to show in the form, but no plan for that at the moment

[mick-t]

This would be a nice feature to have. Where in the code would be a good place to start to try and implement this?