null=True on ManyToMany field yields warning

elpaso / django-dag

Basic portable Directed Acyclic Graph application for Django

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Closed frederik-elwert closed 8 years ago

frederik-elwert commented 8 years ago

Django 1.8 yields a warning:

WARNINGS: units.UnitNode.children: (fields.W340) null has no effect on ManyToManyField.