Silverstripe Version: 4.5.1
I can’t get ModelAdmin to work with Many_Many_Through relationships. I’ve set up the example given here https://docs.silverstripe.org/en/4/developer_guides/model/relations/#many-many-through-relationship-joined-on-a-separate-dataobject
My ModelAdmin is set up as per https://docs.silverstripe.org/en/4/developer_guides/forms/field_types/gridfield/#many-many-extrafields
I’ve also tried specifying the ItemEditFormCallback as per SS4: edit many_many_extraFields in a GridField detail form - SilverStrip.es
The problem is the additional fields show, but do not load or save data.
Here’s a gist Teamp.php · GitHub