覆盖 django-taggit 标签，使它们总是小写

Question

I couldnt find a good answer or solution for multiple tags in a model. the only thing I found close was this:

How can I limit django-taggit to accept only lowercase words?

here is my current code:

from taggit.managers import TaggableManager
from taggit.models import TaggedItemBase


class TaggedStory(TaggedItemBase):
    content_object = models.ForeignKey("Story")


class TaggedSEO(TaggedItemBase):
    content_object = models.ForeignKey("Story")


class Story(models.Model):
    ...

    tags = TaggableManager(through=TaggedStory, blank=True, related_name='story_tags')

    ...

    seo_tags = TaggableManager(through=TaggedSEO, blank=True, related_name='seo_tags')

Answer 1

I usually implement this at the form level:

def clean_tags(self):
    """
    Force all tags to lowercase.
    """
    tags = self.cleaned_data.get('tags', None)
    if tags:
        tags = [t.lower() for t in tags]

    return tags

It really depends on how you look at it. I'm happy with solution because I consider it a validation problem. If you consider it a data integrity problem, I can understand why you'd want to do it at the model level. At which point your best bet is to subclass the taggit modules to a point that you can override Tag.save().

Answer 2

In the appname --> utils file, for eg:(blog --> init .py), define a function as follows:

def comma_splitter(tag_string): """convert each tag into lowercase""" return [t.strip().lower() for t in tag_string.split(',') if t.strip()]

And then, in the settings.py file, define and override the default taggit settings as: TAGGIT_TAGS_FROM_STRING = 'blog. init .comma_splitter'