joshcartme/admin.py

## admin.py
from django.contrib.admin.options import IS_POPUP_VAR
from django.template.response import SimpleTemplateResponse
from django.utils.html import escape, escapejs

from mezzanine.core.admin import TabularDynamicInlineAdmin
from mezzanine.pages.admin import PageAdmin

from .models import TopLevel, SecondLevel, ThirdLevel


class SecondLevelInline(TabularDynamicInlineAdmin):
    model = SecondLevel
    fields = [..., 'edit_third_level', '_order']
    readonly_fields = ['edit_third_level'] # edit_third_level must be in fields and readonly_fields or there will be an exception


class ThirdLevelInline(TabularDynamicInlineAdmin):
    model = ThirdLevel


class SecondLevelAdmin(admin.ModelAdmin):
    exclude = ['top_level', '_order']
    inlines = [ThirdLevelInline]

    def in_menu(self):
        """
        Hide from the admin menu unless explicitly set in ``ADMIN_MENU_ORDER``.
        """
        for (name, items) in settings.ADMIN_MENU_ORDER:
            if "theme.TopBarButton" in items:
                return True
        return False

    def response_change(self, request, obj):
        """
        Determines the HttpResponse for the change_view stage.
        """
        pk_value = obj._get_pk_val()

        if IS_POPUP_VAR in request.POST:
            return SimpleTemplateResponse('admin/popup_response.html', {
                'pk_value': escape(pk_value),
                'obj': escapejs(obj)
            })
        return super(GlossaryCategoryAdmin, self).response_change(request, obj)
admin.site.register(GlossaryCategory, GlossaryCategoryAdmin)


class TopLevelAdmin(PageAdmin):
    inlines = [SecondLevelInline]
admin.site.register(TopLevel, TopLevelAdmin)

## models.py
from mezzanine.pages.models import Page
from mezzanine.utils.urls import admin_url


class TopLevel(Page):
    ...


class SecondLevel(Orderable):
    top_level = models.ForeignKey(TopLevel, related_name="categories")
    ...

    def edit_third_level(self):
        '''
        Returns a link to this items change form
        '''
        if self.id:
            return '<a onclick="return showAddAnotherPopup(this);" href="%s">Edit third level</a>' % admin_url(self.__class__, "change", self.id)
        return ''

    edit_third_level.allow_tags = True


class ThirdLevel(Orderable):
    second_level = models.ForeignKey(SecondLevel)
    ...

## popup_response.html
<!DOCTYPE html>
<html>
  <!-- belongs in templates/admin/popup_response.html -->
  <head><title></title></head>
  <body>
    <script type="text/javascript">
        try{
            opener.dismissAddAnotherPopup(window, "{{ pk_value }}", "{{ obj }}");
        } catch(e) {
            if (e.name === 'ReferenceError') {
                close();
            } else {
                throw e;
            }
        }
    </script>
  </body>
</html>
	from django.contrib.admin.options import IS_POPUP_VAR
	from django.template.response import SimpleTemplateResponse
	from django.utils.html import escape, escapejs

	from mezzanine.core.admin import TabularDynamicInlineAdmin
	from mezzanine.pages.admin import PageAdmin

	from .models import TopLevel, SecondLevel, ThirdLevel


	class SecondLevelInline(TabularDynamicInlineAdmin):
	model = SecondLevel
	fields = [..., 'edit_third_level', '_order']
	readonly_fields = ['edit_third_level'] # edit_third_level must be in fields and readonly_fields or there will be an exception


	class ThirdLevelInline(TabularDynamicInlineAdmin):
	model = ThirdLevel


	class SecondLevelAdmin(admin.ModelAdmin):
	exclude = ['top_level', '_order']
	inlines = [ThirdLevelInline]

	def in_menu(self):
	"""
	Hide from the admin menu unless explicitly set in ``ADMIN_MENU_ORDER``.
	"""
	for (name, items) in settings.ADMIN_MENU_ORDER:
	if "theme.TopBarButton" in items:
	return True
	return False

	def response_change(self, request, obj):
	"""
	Determines the HttpResponse for the change_view stage.
	"""
	pk_value = obj._get_pk_val()

	if IS_POPUP_VAR in request.POST:
	return SimpleTemplateResponse('admin/popup_response.html', {
	'pk_value': escape(pk_value),
	'obj': escapejs(obj)
	})
	return super(GlossaryCategoryAdmin, self).response_change(request, obj)
	admin.site.register(GlossaryCategory, GlossaryCategoryAdmin)


	class TopLevelAdmin(PageAdmin):
	inlines = [SecondLevelInline]
	admin.site.register(TopLevel, TopLevelAdmin)
	from mezzanine.pages.models import Page
	from mezzanine.utils.urls import admin_url


	class TopLevel(Page):
	...


	class SecondLevel(Orderable):
	top_level = models.ForeignKey(TopLevel, related_name="categories")
	...

	def edit_third_level(self):
	'''
	Returns a link to this items change form
	'''
	if self.id:
	return '<a onclick="return showAddAnotherPopup(this);" href="%s">Edit third level</a>' % admin_url(self.__class__, "change", self.id)
	return ''

	edit_third_level.allow_tags = True


	class ThirdLevel(Orderable):
	second_level = models.ForeignKey(SecondLevel)
	...
	<!DOCTYPE html>
	<html>
	<!-- belongs in templates/admin/popup_response.html -->
	<head><title></title></head>
	<body>
	<script type="text/javascript">
	try{
	opener.dismissAddAnotherPopup(window, "{{ pk_value }}", "{{ obj }}");
	} catch(e) {
	if (e.name === 'ReferenceError') {
	close();
	} else {
	throw e;
	}
	}
	</script>
	</body>
	</html>