I'm using django-taggit and I came upon a problem when trying to filter across relationships.
Having the following models:
class Artist(models.Model):
tags = TaggableManager()
class Gig(models.Model):
artist = models.ManyToManyField(Artist)
What I would like to achieve is the get all gigs who's artist(s) have a specific tag.
I thought this would be easy and eagerly wrote:
Gig.objects.filter(artist__tags__name__in=["rock"])
Which gave me:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/manager.py", line 141, in filter
return self.get_query_set().filter(*args, **kwargs)
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/query.py", line 550, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/query.py", line 568, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1172, in add_q
can_reuse=used_aliases, force_having=force_having)
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1139, in add_filter
process_extras=False)
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1060, in add_filter
negate=negate, process_extras=process_extras)
File "/home/jonas/.virtualenvs/wsw/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1238, in setup_joins
"Choices are: %s" % (name, ", ".join(names)))
FieldError: Cannot resolve keyword 'tagged_items' into field. Choices are: artist, date, id, location, url
I managed to fix it by commenting out TaggableManager.extra_filters() in manage.py.
Take it with a grain of salt, because I have no idea what I may have broken by doing this.
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