The API

After you’ve got your TaggableManager added to your model you can start playing around with the API.

class TaggableManager([verbose_name="Tags", help_text="A comma-separated list of tags.", through=None, blank=False])

Parameters:

• verbose_name – The verbose_name for this field.
• help_text – The help_text to be used in forms (including the admin).
• through – The through model, see Using a Custom Tag or Through Model for more information.
• blank – Controls whether this field is required.

add(*tags)

This adds tags to an object. The tags can be either Tag instances, or strings:

>>> apple.tags.all()
[]
>>> apple.tags.add("red", "green", "fruit")

remove(*tags)

Removes a tag from an object. No exception is raised if the object doesn’t have that tag.

clear()

Removes all tags from an object.

set(*tags)

Removes all the current tags and then adds the specified tags to the object.

similar_objects()

Returns a list (not a lazy QuerySet) of other objects tagged similarly to this one, ordered with most similar first. Each object in the list is decorated with a similar_tags attribute, the number of tags it shares with this object.

If the model is using generic tagging (the default), this method searches tagged objects from all classes. If you are querying on a model with its own tagging through table, only other instances of the same model will be returned.

names()

Convenience method, returning a ValuesListQuerySet (basically just an iterable) containing the name of each tag as a string:

>>> apple.tags.names()
[u'green and juicy', u'red']

slugs()

Convenience method, returning a ValuesListQuerySet (basically just an iterable) containing the slug of each tag as a string:

>>> apple.tags.slugs()
[u'green-and-juicy', u'red']

Hint

You can subclass _TaggableManager (note the underscore) to add methods or functionality. TaggableManager takes an optional manager keyword argument for your custom class, like this:

class Food(models.Model):
    # ... fields here
    tags = TaggableManager(manager=_CustomTaggableManager)

Filtering

To find all of a model with a specific tags you can filter, using the normal Django ORM API. For example if you had a Food model, whose TaggableManager was named tags, you could find all the delicious fruit like so:

>>> Food.objects.filter(tags__name__in=["delicious"])
[<Food: apple>, <Food: pear>, <Food: plum>]

If you’re filtering on multiple tags, it’s very common to get duplicate results, because of the way relational databases work. Often you’ll want to make use of the distinct() method on QuerySets:

>>> Food.objects.filter(tags__name__in=["delicious", "red"])
[<Food: apple>, <Food: apple>]
>>> Food.objects.filter(tags__name__in=["delicious", "red"]).distinct()
[<Food: apple>]

You can also filter by the slug on tags. If you’re using a custom Tag model you can use this API to filter on any fields it has.

Aggregation

Unfortunately, due to a bug in Django, it is not currently (Django < 1.6) possible to use aggregation in conjunction with taggit. This is a documented interaction of generic relations (which taggit uses internally) and aggregates.