feat: update template for django 3

lock_tokens/admin.py

@@ -2,6 +2,7 @@
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import PermissionDenied
 from django.db.models import Count
+from django.utils.translation import gettext as _
 
 from lock_tokens.exceptions import AlreadyLockedError
 from lock_tokens.sessions import (
@@ -13,8 +14,14 @@
 
 
 class LockableModelAdmin(admin.ModelAdmin):
+    def render_change_form(self, request, context, add=False, change=False, form_url='', obj=None):
+        # use custom template in change view, but use default in add view, as lock is not used there
+        self.change_form_template = 'admin/lock_tokens_change_form.html'
+        if add:
+            self.change_form_template = None
 
-    change_form_template = 'admin/lock_tokens_change_form.html'
+        return super(LockableModelAdmin, self).render_change_form(request, context, add, change,
+                                                                  form_url, obj)
 
     def change_view(self, request, object_id, form_url="", extra_context=None):
         extra_context = extra_context or {}
@@ -32,22 +39,25 @@ def change_view(self, request, object_id, form_url="", extra_context=None):
             lock_for_session(obj, request.session, force_new=force_new_session_lock)
             extra_context["lock_token"] = request.session[get_session_key(obj)]
         except AlreadyLockedError:
-            messages.add_message(request, messages.ERROR, "You cannot edit this "
-                                 "object, it has been locked. Come back later.")
+            messages.add_message(
+                request,
+                messages.ERROR,
+                _("You cannot edit this object, it has been locked. Come back later.")
+            )
         return super(LockableModelAdmin, self).change_view(request, object_id,
                                                            form_url, extra_context)
 
     def save_model(self, request, obj, form, change):
         if change:
             if not check_for_session(obj, request.session):
-                raise PermissionDenied("Invalid lock, cannot save.")
+                raise PermissionDenied(_("Invalid lock, cannot save."))
             try:
               # Renew lock to make sure it is still valid when saving
               lock_for_session(obj, request.session)
             except AlreadyLockedError:
               # Race condition: lock expired just after the check_for_session call and
               # someone else locked the object before the lock_for_session call
-              raise PermissionDenied("Lock has expired, cannot save.")
+              raise PermissionDenied(_("Lock has expired, cannot save."))
         super(LockableModelAdmin, self).save_model(request, obj, form, change)
         if change:
             unlock_for_session(obj, request.session)

lock_tokens/locale/de/LC_MESSAGES/django.po

@@ -0,0 +1,22 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: lock_tokens\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2021-03-08 08:38-0600\n"
+"PO-Revision-Date: 2021-03-08 09:06+0100\n"
+"Last-Translator: Liip\n"
+"Language: de\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Language-Team: \n"
+"X-Generator: Poedit 2.3\n"
+
+msgid "You cannot edit this object, it has been locked. Come back later."
+msgstr "Sie können dieses Objekt nicht bearbeiten, es wurde gesperrt. Versuchen Sie es später erneut."
+
+msgid "Invalid lock, cannot save."
+msgstr "Ungültige Sperre, kann nicht gespeichert werden."
+
+msgid "Lock has expired, cannot save."
+msgstr "Die Sperre ist abgelaufen, kann nicht gespeichert werden."

lock_tokens/templates/api/load_client.html

@@ -1,4 +1,4 @@
-{% load staticfiles %}
+{% load static %}
 {% if csrf %}{% csrf_token %}{% endif %}
 <script src="{% static "lock_tokens/js/lock_tokens.js" %}" type="text/javascript"></script>
 <script type="text/javascript">

lock_tokens/urls.py

@@ -1,13 +1,12 @@
-from django.conf.urls import url
-
+from django.urls import re_path
 from lock_tokens.views import LockTokenDetailView, LockTokenListView
 
 
 app_name = 'lock_tokens'
 
 urlpatterns = [
-    url(r'^(?P<app_label>\w+)/(?P<model>\w+)/(?P<object_id>\d+)/$',
+    re_path(r'^(?P<app_label>\w+)/(?P<model>\w+)/(?P<object_id>\d+)/$',
         LockTokenListView.as_view(), name='list-view'),
-    url(r'^(?P<app_label>\w+)/(?P<model>\w+)/(?P<object_id>\d+)/(?P<token>\w+)/$',
+    re_path(r'^(?P<app_label>\w+)/(?P<model>\w+)/(?P<object_id>\d+)/(?P<token>\w+)/$',
         LockTokenDetailView.as_view(), name='detail-view'),
 ]