How to show different inlines depending of current object field value

Question

Given a model named MainModel and a RelatedModel, where the later has a ForeignKey field to MainModel:

class          


        

Answer 1

You need just simply override change_view in ModelAdmin:

def change_view(self, request, object_id, form_url='', extra_context=None):
    obj = self.model.objects.filter(pk=object_id).first()
    if not obj:
        self.inlines = []
    else:
        if obj.type is True:
            self.inlines = [RelatedModel1InlineAdmin]
        else:
            self.inlines = [RelatedModel2InlineAdmin]

    return super().change_view(request,object_id,form_url=form_url,extra_context=extra_context)

that's work for me.