ValueError: Cannot add *: instance is on database “default”, value is on database “None”

Question

In [1]: from editor.models import *
In [4]: from subscriptions.models import *
In [5]: template = StockTemplate.objects.create(name=\'Template 1\')
In [6]: template
Out[         


        

Answer 1

The problem here is you need call the method save for both objects before add:

template.save()
plan.save()
plan.templates.add(template)

Django can not add a template of a plan if none of that objects don't have an id