Peewee ManyToManyField support

[axsaucedo]

Hi,

The ManyToManyField is not supported in wtf-peewee, and hence it is not supported in Flask-Admin as per Issue#1318.

Are there any plans to add this feature?

Thank you

[coleifer]

Possibly. For the trivial case, I guess it wouldn't be that bad, but if the junction table has columns beyond just the two foreign keys, things could get pretty wild.

[axsaucedo]

Good point.

I believe that in Django, the trivial case is always assumed - any extra fields would be completely ignored, and only the related fields would be taken into account.

If someone wants to modify the extra data from a through table it would be sensible for them to specify the table explicitly.

[z3ugma]

@coleifer I find myself wanting to support this use case too, is there a way to take a declared model_form and extend it with a custom selectfield?

For example, make a subclass form that inherits from the model_form and adds additional custom fields

I am happy to implement the Flask view method that would take the select field and create the many-to-many relation