Adds compatibility to (at least) Django 3.2

fancytree/widgets.py

@@ -1,3 +1,4 @@
+from collections import ChainMap
 from itertools import chain
 
 from django import forms
@@ -6,7 +7,7 @@
 from django.utils.encoding import force_text
 from django.utils.html import conditional_escape
 from django.utils.safestring import mark_safe
-from django.utils.datastructures import MultiValueDict, MergeDict
+from django.utils.datastructures import MultiValueDict
 from mptt.templatetags.mptt_tags import cache_tree_children
 
 try:
@@ -21,7 +22,7 @@ def get_doc(node, values):
     if hasattr(node, "name"):
         name = node.name
     else:
-        name = unicode(node)
+        name = str(node)
     doc = {"title": name, "key": node.pk}
     if str(node.pk) in values:
         doc['selected'] = True
@@ -51,17 +52,17 @@ def __init__(self, attrs=None, choices=(), queryset=None, select_mode=2):
         self.choices = list(choices)
 
     def value_from_datadict(self, data, files, name):
-        if isinstance(data, (MultiValueDict, MergeDict)) and self.select_mode != 1:
+        if isinstance(data, (MultiValueDict, ChainMap)) and self.select_mode != 1:
             return data.getlist(name)
         return data.get(name, None)
 
-    def render(self, name, value, attrs=None, choices=()):
+    def render(self, name, value, attrs=None, choices=(), renderer=None):
         if value is None:
             value = []
         if not isinstance(value, (list, tuple)):
             value = [value]
         has_id = attrs and 'id' in attrs
-        final_attrs = self.build_attrs(attrs, name=name)
+        final_attrs = self.build_attrs(attrs, {"name": name})
         if has_id:
             output = [u'<div id="%s"></div>' % attrs['id']]
             id_attr = u' id="%s_checkboxes"' % (attrs['id'])

treewidget/apps/categories/migrations/0001_initial.py

@@ -16,13 +16,13 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                 ('name', models.CharField(max_length=50)),
-                ('slug', django_extensions.db.fields.AutoSlugField(editable=False, populate_from=b'name', blank=True, overwrite=True)),
+                ('slug', django_extensions.db.fields.AutoSlugField(editable=False, populate_from='name', blank=True, overwrite=True)),
                 ('url', models.TextField(editable=False)),
                 ('lft', models.PositiveIntegerField(editable=False, db_index=True)),
                 ('rght', models.PositiveIntegerField(editable=False, db_index=True)),
                 ('tree_id', models.PositiveIntegerField(editable=False, db_index=True)),
                 ('level', models.PositiveIntegerField(editable=False, db_index=True)),
-                ('parent', models.ForeignKey(related_name='children', blank=True, to='categories.Category', null=True)),
+                ('parent', models.ForeignKey(related_name='children', blank=True, to='categories.Category', null=True, on_delete=models.CASCADE)),
             ],
             options={
                 'ordering': ('tree_id', 'lft'),

treewidget/apps/categories/models.py

@@ -1,15 +1,16 @@
 from django.db import models
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django_extensions.db.fields import AutoSlugField
 import mptt
 
-from urlparse import urljoin
+from urllib.parse import urljoin
 
 class Category(models.Model):
     parent = models.ForeignKey('self',
                                null=True,
                                blank=True,
-                               related_name='children')
+                               related_name='children',
+                               on_delete=models.CASCADE)
     name = models.CharField(max_length=50)
     slug = AutoSlugField(max_length=50,
                          overwrite=True,

treewidget/settings.py

@@ -97,7 +97,7 @@
 #     'django.template.loaders.eggs.Loader',
 )
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
     'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
@@ -116,12 +116,23 @@
 
 ROOT_URLCONF = 'urls'
 
-TEMPLATE_DIRS = (
-    # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
-    # Always use forward slashes, even on Windows.
-    # Don't forget to use absolute paths, not relative paths.
-    os.path.join(PROJECT_ROOT, 'templates'),
-)
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [
+            os.path.join(PROJECT_ROOT, 'templates'),
+        ],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
 
 INSTALLED_APPS = (
     'django.contrib.auth',

treewidget/urls.py

@@ -1,24 +1,12 @@
-from django.conf.urls import patterns, include, url
-
 from django.contrib import admin
-admin.autodiscover()
-
-urlpatterns = patterns('',
-    url(r'^$', 'views.home', name='home'),
-    url(r'^selection/(?P<pk>\d)$', 'views.selection', name='selection'),
+from django.urls import path
 
-    url(r'^admin/', include(admin.site.urls)),
-)
+from treewidget.views import home, selection
 
-from django.conf import settings
-from django.contrib.staticfiles.urls import staticfiles_urlpatterns
-
-urlpatterns += staticfiles_urlpatterns()
+admin.autodiscover()
 
-if settings.DEBUG:
-    urlpatterns += patterns('', (
-        r'^site_media/media/(?P<path>.*)$',
-        'django.views.static.serve',
-        {'document_root': settings.MEDIA_ROOT}
-        ),
-    )
+urlpatterns = [
+    path("", home, name='home'),
+    path("selection/<pk>", selection, name='selection'),
+    path("admin/", admin.site.urls),
+]