Nested Categories / InlinePanel in Wagtail

Question

I am trying to implement something like "nested categories":

PageA: - Cat1 - SubCat1 - SubCat2 - ... - Cat2 - SubCat1 - ... 

All categories and subcategories should be orderable and editable by the editor.

My guess was something like this:

 class CategoryTestPage(Page): content_panels = Page.content_panels + [ InlinePanel('categories') ] class Category(Orderable,ClusterableModel,models.Model): page = ParentalKey(CategoryTestPage, related_name='category') category = models.CharField(max_length=250) def __str__(self): return "%d %s" % (self.id, self.category) panels = [ FieldPanel('category'), InlinePanel('subcategory') ] class SubCategory(Orderable,models.Model): category = ParentalKey(ProjektOrdnung, related_name='subcategory') subcategory = models.CharField(max_length=250) def __str__(self): return "%d %s" % (self.id, self.subcategory) panels = [ FieldPanel('subcategory') ] 

But this leads to a 'CategoryForm' object has no attribute 'formsets' . InlinePanel nested InlinePanel problem?

Next, I need this “hierarchical taxonomy” to assign some of these categories / subcategories to other pages:

 PageB: - has Cat1 - has SubCa2 - ... 

... which is very similar to hierarchical tags ...

Any ideas on how to implement this or what is wrong with my implementation?

Regards, tombreit

PS: I'm on wagtail 1.2rc1

Answer 1

Here is one way to do this, with more options for improving the interface;) To sort the categories at the page level, I would suggest using django-sortedm2m .

 from wagtail.wagtailcore.models import Orderable, Page from wagtail.wagtailsnippets.models import register_snippet from django.db import models @register_snippet class Category(models.Model): name = models.CharField( max_length=80, unique=True, verbose_name=_('Category Name')) slug = models.SlugField(unique=True, max_length=80) parent = models.ForeignKey( 'self', blank=True, null=True, related_name="children", help_text=_( 'Categories, unlike tags, can have a hierarchy. You might have a ' 'Jazz category, and under that have children categories for Bebop' ' and Big Band. Totally optional.') ) description = models.CharField(max_length=500, blank=True) class Meta: ordering = ['name'] verbose_name = _("Category") verbose_name_plural = _("Categories") panels = [ FieldPanel('name'), FieldPanel('parent'), FieldPanel('description'), ] def __str__(self): return self.name def clean(self): if self.parent: parent = self.parent if self.parent == self: raise ValidationError('Parent category cannot be self.') if parent.parent and parent.parent == self: raise ValidationError('Cannot have circular Parents.') def save(self, *args, **kwargs): if not self.slug: self.slug = slugify(self.name) return super(Category, self).save(*args, **kwargs) class CategoryPage(models.Model): category = ParentalKey('Category', related_name="+", verbose_name=_('Category')) page = ParentalKey('MyPage', related_name='+') panels = [ FieldPanel('category'), ] class MyPage(Page): categories = models.ManyToManyField(Category, through=CategoryPage, blank=True) content_panels = Page.content_panels + [ FieldPanel('categories'), ]