`category` and `tag` shared by multiple wagtail page types - many-to-many

Question

I have a Django+Wagtail website, and have category and tag created to be applied to blog posts.
from taggit.models import Tag as TaggitTag
from taggit.models import TaggedItemBase
class PostList(RoutablePageMixin, Page):
template = "Post_List.html"
intro = RichTextField(blank=True)
content_panels = Page.content_panels + [
FieldPanel("intro")
]
subpage_types = [
"PostDetail",
]
parent_page_type = [
"HomePage",
]
# Each 'search / category / tag / author' will generate a separate 'PostList' page with its own 'context',
# hence for 'Pagination' for all 'PostList' pages, we only need to implement in 'get_context()'
def get_context(self, request, *args, **kwargs):
context = super().get_context(request, *args, **kwargs)
# For Pagination
page_id = request.GET.get("page")
paginator = Paginator(self.posts, 3) # 'posts' is defined in 'def post_list()' and 'def get_posts()' as below.
try:
paginator_page = paginator.page(page_id)
except PageNotAnInteger:
paginator_page = paginator.page(1)
page_id = 1
except EmptyPage:
paginator_page = paginator.page(1)
page_id =1
context['paginator_page'] = paginator_page
context['total_num_pages'] = paginator.num_pages
# By default, Paginator.get_elided_page_range(number, *, on_each_side=3, on_ends=2)
context['elided_page_range'] = paginator.get_elided_page_range(page_id, on_each_side=5, on_ends=2)
return context
def get_posts(self):
return PostDetail.objects.descendant_of(self).live()
#route(r'^tag/(?P<tag>[-\w]+)/$')
def post_by_tag(self, request, tag, *args, **kwargs):
self.search_type = 'tag'
self.search_term = tag
self.posts = self.get_posts().filter(tags__name=tag)
return Page.serve(self, request, *args, **kwargs)
#route(r'^category/(?P<category>[-\w]+)/$')
def post_by_category(self, request, category, *args, **kwargs):
self.search_type = 'category'
self.search_term = category
self.posts = self.get_posts().filter(categories__category__name=category)
return Page.serve(self, request, *args, **kwargs)
#route(r'^user/(?P<user>[-\w]+)/$')
def post_by_user(self, request, user, *args, **kwargs):
self.search_type = 'user'
self.search_term = user
self.posts = self.get_posts().filter(owner__username=user)
return Page.serve(self, request, *args, **kwargs)
#route(r'^$')
def post_list(self, request, *args, **kwargs):
self.posts = self.get_posts()
return Page.serve(self, request, *args, **kwargs)
#route(r'^search/$')
def post_search(self, request, *args, **kwargs):
search_query = request.GET.get('q', None)
self.posts = self.get_posts()
if search_query:
self.posts = self.posts.filter(body__contains=search_query)
self.search_term = search_query
self.search_type = 'search'
return Page.serve(self, request, *args, **kwargs)
class PostDetail(Page):
template = "Post_Detail.html"
body = MarkdownField()
tags = ClusterTaggableManager(through="PostDetailTag", blank=True)
#register_snippet
class Category(models.Model):
name = models.CharField(max_length=255)
slug = models.SlugField(unique=True, max_length=100)
panels = [
FieldPanel("name"),
FieldPanel("slug"),
]
def __str__(self):
return self.name
class Meta:
verbose_name = "Category"
verbose_name_plural = "Categories"
ordering = ["name"]
#register_snippet
class Tag(TaggitTag):
class Meta:
proxy = True
# Intermediate Models for ManyToMany Relationship
class PostDetailCategory(models.Model):
post = ParentalKey("PostDetail", on_delete=models.CASCADE, related_name="categories")
category = models.ForeignKey("Category", on_delete=models.CASCADE, related_name="post_details")
panels = [
SnippetChooserPanel("category"),
]
class Meta:
unique_together = ("post", "category")
class PostDetailTag(TaggedItemBase):
content_object = ParentalKey("PostDetail", on_delete=models.CASCADE)
Now, I am about to creating another wagtail page type "SurveyPoll", and want to have tag and category applied as well.
What is the best practice for this deployment, same tag and category applied to different wagtail page types via ManyToMany relationship ?
Which type of ManyToMany relationship deployment is better, tag or category ? Personally, I prefer the category way as it allows me to choose from a list of existing category in wagtail admin edit page.