i found that even trying to access the relation (i.e. foo.bars) will trigger the same error !!! the only special thing about my model is that i defined foo's primary key as BigIntegerField
On Tuesday, August 4, 2015 at 8:15:42 AM UTC+4:30, [email protected] wrote: > > Erik, as stated in documentation > <https://docs.djangoproject.com/en/1.8/ref/models/relations/#direct-assignment>, > > what you said is equivalent to what i did > and the error exists yet. to have more details, here is the stack trace: > > Traceback (most recent call last): > File "<console>", line 2, in <module> > File "/home/user/Workspace/src/models.py", line 155, in create_from_dict > obj.bars.clear() > File > "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/related.py" > , line 1253, in __get__ > through=self.field.rel.through, > File > "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/related.py" > , line 862, in __init__ > source_field = through._meta.get_field(source_field_name) > File > "/usr/local/lib/python2.7/dist-packages/django/db/models/options.py", > line 554, in get_field > raise FieldDoesNotExist('%s has no field named %r' % (self.object_name > , field_name)) > FieldDoesNotExist: Foo_bars has no field named None > > > > > On Monday, August 3, 2015 at 3:01:28 PM UTC+4:30, Erik Cederstrand wrote: >> >> >> > Den 03/08/2015 kl. 08.50 skrev [email protected]: >> > >> > Hello Django community. >> > I have two Django models Foo and Bar that have a ManyToMany relation: >> > >> > Class Foo(models.model): >> > >> > ... >> > >> > bars = models.ManyToManyField('Bar', related_name='foos') >> > somewhere in the code, i do direct assignment to replace the relation >> with a new list: >> > >> > foo_object.bars = [bar_object_list] >> >> You can't do that, AFAIK. You need to do: >> >> foo_object.bars.clear() >> foo_object.bars.add(*bar_object_list) >> >> >> Erik > > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/125f12da-02ff-4202-8ca8-4509e9d5154f%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
