Add django-slug-preview support

This improves the appearance of slugs in the admin

CHANGES.rst

@@ -10,6 +10,7 @@ Changes in git
 * Added multiple fallback language support for django-parler_ 1.5.
 * Added ``make_language_redirects`` management command for redirecting an unmaintained language to another.
 * Added ``is_child_active`` variable in ``PageNavigationNode`` for menu templates.
+* Added django-slug-preview_ for nicer slug appearance in the admin.
 * Improve error messages when URLs can't be created.
 * Improve performance of ``PageSitemap`` for sites with a lot of pages.
 * Temporary fix: Block moving pages to untranslated sub nodes, until a design decision can be made how to handle this.
@@ -256,4 +257,5 @@ First public release
 .. _django-mptt: https://github.com/django-mptt/django-mptt
 .. _django-parler: https://github.com/edoburu/django-parler
 .. _django-polymorphic-tree: https://github.com/edoburu/django-polymorphic-tree
+.. _django-slug-preview: https://github.com/edoburu/django-slug-preview
 .. _django-tag-parser: https://github.com/edoburu/django-tag-parser

README.rst

@@ -71,6 +71,7 @@ To have a standard setup with django-fluent-contents_ integrated, use::
         'parler',
         'polymorphic',
         'polymorphic_tree',
+        'slug_preview',
 
         # Optional widget pages via django-fluent-contents
         'fluent_pages.pagetypes.fluentpage',

example/requirements.txt

@@ -8,6 +8,7 @@ django-mptt >= 0.6.0
 django-parler >= 1.5
 django-polymorphic-tree >= 1.1.1
 django-polymorphic >= 0.5.5
+django-slug-preview >= 0.9
 django-tag-parser >= 2.1
 
 # For the `fluent_pages.plugins.fluentpage` plugin:

example/settings.py

@@ -107,6 +107,7 @@
     'polymorphic',
     'polymorphic_tree',
     'parler',
+    'slug_preview',
 
     # Content for fluentpage, with plugins that have no extra configuration requirements
     'fluent_contents',

fluent_pages/adminui/urlnodechildadmin.py

@@ -7,13 +7,14 @@
 from fluent_pages import appsettings
 from parler.admin import TranslatableAdmin
 from parler.forms import TranslatableModelForm, TranslatedField
+from slug_preview.forms import SlugPreviewFormMixin
 from fluent_pages.models import UrlNode, UrlNode_Translation
 from fluent_pages.forms.fields import RelativeRootPathField
 from fluent_utils.dry.admin import MultiSiteAdminMixin
 import mptt
 
 
-class UrlNodeAdminForm(MPTTAdminForm, TranslatableModelForm):
+class UrlNodeAdminForm(MPTTAdminForm, SlugPreviewFormMixin, TranslatableModelForm):
     """
     The admin form for the main fields (the ``UrlNode`` object).
     """

fluent_pages/models/db.py

@@ -26,6 +26,7 @@
 from fluent_pages import appsettings
 from fluent_utils.django_compat import transaction_atomic, AUTH_USER_MODEL
 from parler.utils.context import switch_language
+from slug_preview.models import SlugPreviewField
 from future.utils import with_metaclass, itervalues, iteritems
 
 
@@ -151,6 +152,27 @@ def get_absolute_url(self):
         # is included at a sublevel, it needs to be prepended.
         return self.default_url
 
+    def get_absolute_url_format(self):
+        if self.is_file:
+            url_format = '/{slug}'
+        else:
+            url_format = '/{slug}/'
+
+        # Extra for django-slug-preview
+        if self.parent_id:
+            # TODO: optimize this call. In some cases this would also work..
+            #       that is, unless get_absolute_url() is redefined or ABSOLUTE_URL_OVERRIDES was used.
+            #parent_url = self.get_translation(self.get_current_language()).get_parent_cached_url(self)
+
+            # Need to fetch the whole parent to make sure the URL matches the actual URL being used.
+            parent = self.parent
+            with switch_language(parent, self.get_current_language()):
+                parent_url = parent.get_absolute_url()
+
+            return parent_url.rstrip('/') + url_format
+        else:
+            return url_format
+
     @property
     def default_url(self):
         """
@@ -530,7 +552,7 @@ class UrlNode_Translation(TranslatedFieldsModel):
     """
     # Translated fields
     title = models.CharField(_("title"), max_length=255)
-    slug = models.SlugField(_("slug"), max_length=100, help_text=_("The slug is used in the URL of the page"))
+    slug = SlugPreviewField(_("slug"), max_length=100, help_text=_("The slug is used in the URL of the page"))
     override_url = models.CharField(_('Override URL'), editable=True, max_length=255, blank=True, help_text=_('Override the target URL. Be sure to include slashes at the beginning and at the end if it is a local URL. This affects both the navigation and subpages\' URLs.'))
     _cached_url = models.CharField(max_length=255, db_index=True, null=True, blank=True, editable=False)
 

setup.py

@@ -44,6 +44,7 @@ def find_version(*parts):
         'django-parler>=1.6',              # Needed for Django 1.9 compatibility
         'django-polymorphic>=0.7',         # Needed for Django 1.8 compatibility
         'django-polymorphic-tree>=1.2',    # Needed for Django 1.9 compatibility
+        'django-slug-preview>=0.9',
         'django-tag-parser>=2.1',
         'future>=0.12.2',
         'six>=1.5.2',