Django-Taggit | Getting ALL tags, but only related to blog

Question

I am using django-taggit to tag three different types of models:

• a blog
• a list of events
• a list of products.

This all works fine.

I am now trying to grab a list of all the available tags related to the blog so I can display them on the BlogIndex page. The furthest I've gotten is, thanks to a similar SO question:

from taggit.models import Tag

def blog_tags(self):
    tags = Tag.objects.all()
    return tags

However this gives me a list of every single tag, including the product and event tags.

How do I filter that list of tags down to just the blog?

EDIT | modely.py simplified:

class BlogPostTag(TaggedItemBase):
    content_object = ParentalKey('BlogPost', related_name='tagged_items')

class BlogPost(Page):
    # my fields
    tags = ClusterTaggableManager(through=BlogPostTag, blank=True)

    # Getting BlogPost-specific tags here is not difficult

class BlogIndex(Page):
    # my fields

    def blog_tags(self):
        etc...

Answer 1

If tags are directly put on your Blog object (that I'll call here myBlog ) and you want to fetch all of them, here's what you can do :

myBlog.tags.all()

However, this might not be what you're looking for : please do post the code related to your models.

EDIT.

What I gather from the code is that you tag your blog posts with a custom class BlogPostTag that inherits TaggedItemBase , an abstract class that looks like this :

class TaggedItemBase(ItemBase):
      tag = models.ForeignKey(Tag, 
        related_name="%(app_label)s_%(class)s_items", on_delete=models.CASCADE)

I can't test it because there's not enough code, but I think you might be able to fetch all the tags on your blog posts by doing something like this :

  BlogPostTag.objects.all().values('tag')

Keep us posted! Thank you :-)

Answer 2

For anyone else looking for an answer to this question, I found a simple workaround:

def blog_tags(self):
    tags = BlogPost.tags.most_common()
    return tags

This lists all the tags associated with the BlogPost model in order of most used to least used.