Bugfix missing static files by tagulous bug.

Add a work-a-round for: https://github.com/radiac/django-tagulous/issues/164

The old tagulous implementation raised a silent error with Django >=4.0

The real fix is here: https://github.com/radiac/django-tagulous/pull/167

src/inventory/admin/item.py

@@ -18,6 +18,7 @@ from inventory.admin.base import (
     LimitTreeDepthListFilter,
     UserInlineMixin,
 )
+from inventory.admin.tagulous_fix import TagulousModelAdminFix
 from inventory.models import ItemLinkModel, ItemModel
 from inventory.models.item import ItemFileModel, ItemImageModel
 from inventory.string_utils import ltruncatechars
@@ -45,7 +46,7 @@ class ItemModelResource(ModelResource):
 
 
 @admin.register(ItemModel)
-class ItemModelAdmin(ImportExportMixin, SortableAdminMixin, BaseUserAdmin):
+class ItemModelAdmin(TagulousModelAdminFix, ImportExportMixin, SortableAdminMixin, BaseUserAdmin):
     @admin.display(description=_('Related items'))
     def related_items(self, obj):
         if obj.pk is None:

src/inventory/admin/memo.py

@@ -13,6 +13,7 @@ from inventory.admin.base import (
     BaseUserAdmin,
     UserInlineMixin,
 )
+from inventory.admin.tagulous_fix import TagulousModelAdminFix
 from inventory.models import MemoLinkModel, MemoModel
 from inventory.models.memo import MemoFileModel, MemoImageModel
 
@@ -39,7 +40,7 @@ class MemoModelResource(ModelResource):
 
 
 @admin.register(MemoModel)
-class MemoModelAdmin(ImportExportMixin, SortableAdminMixin, BaseUserAdmin):
+class MemoModelAdmin(TagulousModelAdminFix, ImportExportMixin, SortableAdminMixin, BaseUserAdmin):
     def get_max_order(self, request, obj=None):
         # Work-a-round for: https://github.com/jrief/django-admin-sortable2/issues/341
         return 0

src/inventory/admin/tagulous_fix.py

@@ -0,0 +1,45 @@
+"""
+    Work-a-round for:
+        https://github.com/radiac/django-tagulous/issues/164
+"""
+from django import forms
+from django.contrib.admin.widgets import AutocompleteMixin
+from tagulous import settings as tagulous_settings
+from tagulous.forms import AdminTagWidget, BaseTagField
+from tagulous.models import SingleTagField, TagField
+
+
+class AdminTagWidget2(AdminTagWidget):
+    @property
+    def media(self):
+        # Get the media from the AutocompleteMixin - this will give us Django's
+        # vendor jQuery and select2
+        class GetMedia(AutocompleteMixin, forms.Select):
+            pass
+
+        dependency_media = GetMedia(None, None).media
+        tagulous_media = forms.Media(
+            js=tagulous_settings.ADMIN_AUTOCOMPLETE_JS,
+            css=tagulous_settings.ADMIN_AUTOCOMPLETE_CSS,
+        )
+        all_media = dependency_media + tagulous_media
+
+        return all_media
+
+
+class BaseTagField2(BaseTagField):
+    widget = AdminTagWidget2
+
+
+class TagulousModelAdminFix:
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.formfield_overrides[SingleTagField] = {
+            'form_class': BaseTagField2,
+            'widget': AdminTagWidget2,
+        }
+        self.formfield_overrides[TagField] = {
+            'form_class': BaseTagField2,
+            'widget': AdminTagWidget2,
+        }