Django fixtures auto populate time based fields -

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i trying use fixtures auto populate fields category field. how have defined it:

class timestampedmodel(models.model):     """ timestampedmodel     abstract base class model provides self-managed "created" ,     "modified" fields.     """     created_on = models.datetimefield(auto_now_add=true)     updated_on = models.datetimefield(auto_now=true)  class category(timestampedmodel):     name = models.charfield(max_length=255)     is_regional = models.booleanfield(default=false)     subtitle = models.charfield(max_length=255, null=true, default=none)     is_selected = models.booleanfield(default=false)

i run following error:

problem installing fixture '/users/varunj/projects/backend/newsybackend/api/fixtures/admin_categories.yaml': not load api.category(pk=1): (1048, "column 'created_on' cannot null")

shouldn't fixture take care of subclass fields themselve, given auto_now anyway?


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