latest

Author: igavriil

tagging/__init__.py

@@ -1,62 +1,15 @@
-VERSION = (0, 4, 0, "dev", 1)
+"""
+Django-tagging
+"""
+__version__ = '0.4.6'
+__license__ = 'BSD License'
 
+__author__ = 'Jonathan Buchanan'
+__author_email__ = '[email protected]'
 
+__maintainer__ = 'Fantomas42'
+__maintainer_email__ = '[email protected]'
 
-def get_version():
-    if VERSION[3] == "final":
-        return "%s.%s.%s" % (VERSION[0], VERSION[1], VERSION[2])
-    elif VERSION[3] == "dev":
-        if VERSION[2] == 0:
-            return "%s.%s.%s%s" % (VERSION[0], VERSION[1], VERSION[3], VERSION[4])
-        return "%s.%s.%s.%s%s" % (VERSION[0], VERSION[1], VERSION[2], VERSION[3], VERSION[4])
-    else:
-        return "%s.%s.%s%s" % (VERSION[0], VERSION[1], VERSION[2], VERSION[3])
+__url__ = 'https://github.com/Fantomas42/django-tagging'
 
-
-__version__ = get_version()
-
-
-class AlreadyRegistered(Exception):
-    """
-    An attempt was made to register a model more than once.
-    """
-    pass
-
-
-registry = []
-
-
-def register(model, tag_descriptor_attr='tags',
-             tagged_item_manager_attr='tagged'):
-    """
-    Sets the given model class up for working with tags.
-    """
-
-    from tagging.managers import ModelTaggedItemManager, TagDescriptor
-
-    if model in registry:
-        raise AlreadyRegistered("The model '%s' has already been "
-            "registered." % model._meta.object_name)
-    if hasattr(model, tag_descriptor_attr):
-        raise AttributeError("'%s' already has an attribute '%s'. You must "
-            "provide a custom tag_descriptor_attr to register." % (
-                model._meta.object_name,
-                tag_descriptor_attr,
-            )
-        )
-    if hasattr(model, tagged_item_manager_attr):
-        raise AttributeError("'%s' already has an attribute '%s'. You must "
-            "provide a custom tagged_item_manager_attr to register." % (
-                model._meta.object_name,
-                tagged_item_manager_attr,
-            )
-        )
-
-    # Add tag descriptor
-    setattr(model, tag_descriptor_attr, TagDescriptor())
-
-    # Add custom manager
-    ModelTaggedItemManager().contribute_to_class(model, tagged_item_manager_attr)
-
-    # Finally register in registry
-    registry.append(model)
+default_app_config = 'tagging.apps.TaggingConfig'

tagging/admin.py

@@ -1,13 +1,16 @@
+"""
+Admin components for tagging.
+"""
 from django.contrib import admin
-from tagging.models import Tag, TaggedItem
+
+from tagging.models import Tag
+from tagging.models import TaggedItem
 from tagging.forms import TagAdminForm
 
+
 class TagAdmin(admin.ModelAdmin):
     form = TagAdminForm
 
+
 admin.site.register(TaggedItem)
 admin.site.register(Tag, TagAdmin)
-
-
-
-

tagging/apps.py

@@ -0,0 +1,14 @@
+"""
+Apps for tagging.
+"""
+from django.apps import AppConfig
+from django.utils.translation import ugettext_lazy as _
+
+
+class TaggingConfig(AppConfig):
+    """
+    Config for Tagging application.
+    """
+    name = 'tagging'
+    label = 'tagging'
+    verbose_name = _('Tagging')

tagging/fields.py

@@ -8,6 +8,8 @@
 from tagging import settings
 from tagging.models import Tag
 from tagging.utils import edit_string_for_tags
+from tagging.forms import TagField as TagFormField
+
 
 class TagField(CharField):
     """
@@ -18,8 +20,6 @@ class TagField(CharField):
     def __init__(self, *args, **kwargs):
         kwargs['max_length'] = kwargs.get('max_length', 255)
         kwargs['blank'] = kwargs.get('blank', True)
-        kwargs['default'] = kwargs.get('default', '')
-        self._initialized = False
         super(TagField, self).__init__(*args, **kwargs)
 
     def contribute_to_class(self, cls, name):
@@ -54,31 +54,34 @@ class Link(models.Model):
         if instance is None:
             return edit_string_for_tags(Tag.objects.usage_for_model(owner))
 
+        tags = self._get_instance_tag_cache(instance)
+        if tags is None:
+            if instance.pk is None:
+                self._set_instance_tag_cache(instance, '')
+            else:
+                self._set_instance_tag_cache(
+                    instance, edit_string_for_tags(
+                        Tag.objects.get_for_object(instance)))
         return self._get_instance_tag_cache(instance)
 
     def __set__(self, instance, value):
         """
         Set an object's tags.
         """
         if instance is None:
-            raise AttributeError(_('%s can only be set on instances.') % self.name)
+            raise AttributeError(
+                _('%s can only be set on instances.') % self.name)
         if settings.FORCE_LOWERCASE_TAGS and value is not None:
             value = value.lower()
         self._set_instance_tag_cache(instance, value)
 
-    def _save(self, **kwargs): #signal, sender, instance):
+    def _save(self, **kwargs):  # signal, sender, instance):
         """
         Save tags back to the database
         """
         tags = self._get_instance_tag_cache(kwargs['instance'])
-        Tag.objects.update_tags(kwargs['instance'], tags)
-
-    def _update(self, **kwargs): #signal, sender, instance):
-        """
-        Update tag cache from TaggedItem objects.
-        """
-        instance = kwargs['instance']
-        self._update_instance_tag_cache(instance)
+        if tags is not None:
+            Tag.objects.update_tags(kwargs['instance'], tags)
 
     def __delete__(self, instance):
         """
@@ -90,31 +93,24 @@ def _get_instance_tag_cache(self, instance):
         """
         Helper: get an instance's tag cache.
         """
-        if not self._initialized:
-            self._initialized = True
-            self._update(instance=instance)        
         return getattr(instance, '_%s_cache' % self.attname, None)
 
     def _set_instance_tag_cache(self, instance, tags):
         """
         Helper: set an instance's tag cache.
         """
+        # The next instruction does nothing particular,
+        # but needed to by-pass the deferred fields system
+        # when saving an instance, which check the keys present
+        # in instance.__dict__.
+        # The issue is introducted in Django 1.10
+        instance.__dict__[self.attname] = tags
         setattr(instance, '_%s_cache' % self.attname, tags)
 
-    def _update_instance_tag_cache(self, instance):
-        """
-        Helper: update an instance's tag cache from actual Tags.
-        """
-        # for an unsaved object, leave the default value alone
-        if instance.pk is not None:
-            tags = edit_string_for_tags(Tag.objects.get_for_object(instance))
-            self._set_instance_tag_cache(instance, tags)
-
     def get_internal_type(self):
         return 'CharField'
 
     def formfield(self, **kwargs):
-        from tagging import forms
-        defaults = {'form_class': forms.TagField}
+        defaults = {'form_class': TagFormField}
         defaults.update(kwargs)
         return super(TagField, self).formfield(**defaults)

tagging/forms.py

@@ -1,5 +1,5 @@
 """
-Tagging components for Django's form library.
+Form components for tagging.
 """
 from django import forms
 from django.utils.translation import ugettext as _
@@ -8,33 +8,30 @@
 from tagging.models import Tag
 from tagging.utils import parse_tag_input
 
+
 class TagAdminForm(forms.ModelForm):
     class Meta:
         model = Tag
+        fields = ('name',)
 
     def clean_name(self):
         value = self.cleaned_data['name']
         tag_names = parse_tag_input(value)
         if len(tag_names) > 1:
             raise forms.ValidationError(_('Multiple tags were given.'))
-        elif len(tag_names[0]) > settings.MAX_TAG_LENGTH:
-            raise forms.ValidationError(
-                _('A tag may be no more than %s characters long.') %
-                    settings.MAX_TAG_LENGTH)
         return value
 
+
 class TagField(forms.CharField):
     """
     A ``CharField`` which validates that its input is a valid list of
     tag names.
     """
     def clean(self, value):
         value = super(TagField, self).clean(value)
-        if value == u'':
-            return value
         for tag_name in parse_tag_input(value):
             if len(tag_name) > settings.MAX_TAG_LENGTH:
                 raise forms.ValidationError(
                     _('Each tag may be no more than %s characters long.') %
-                        settings.MAX_TAG_LENGTH)
+                    settings.MAX_TAG_LENGTH)
         return value

tagging/generic.py

@@ -1,5 +1,9 @@
+"""
+Generic components for tagging.
+"""
 from django.contrib.contenttypes.models import ContentType
 
+
 def fetch_content_objects(tagged_items, select_related_for=None):
     """
     Retrieves ``ContentType`` and content objects for the given list of
@@ -15,7 +19,8 @@ def fetch_content_objects(tagged_items, select_related_for=None):
     ``ContentType``) for which ``select_related`` should be used when
     retrieving model instances.
     """
-    if select_related_for is None: select_related_for = []
+    if select_related_for is None:
+        select_related_for = []
 
     # Group content object pks by their content type pks
     objects = {}
@@ -27,9 +32,11 @@ def fetch_content_objects(tagged_items, select_related_for=None):
     for content_type_pk, object_pks in objects.iteritems():
         model = content_types[content_type_pk].model_class()
         if content_types[content_type_pk].model in select_related_for:
-            objects[content_type_pk] = model._default_manager.select_related().in_bulk(object_pks)
+            objects[content_type_pk] = model._default_manager.select_related(
+                ).in_bulk(object_pks)
         else:
-            objects[content_type_pk] = model._default_manager.in_bulk(object_pks)
+            objects[content_type_pk] = model._default_manager.in_bulk(
+                object_pks)
 
     # Set content types and content objects in the appropriate cache
     # attributes, so accessing the 'content_type' and 'object'

tagging/managers.py

@@ -1,17 +1,18 @@
 """
-Custom managers for Django models registered with the tagging
-application.
+Custom managers for tagging.
 """
-from django.contrib.contenttypes.models import ContentType
 from django.db import models
+from django.contrib.contenttypes.models import ContentType
+
+from tagging.models import Tag
+from tagging.models import TaggedItem
 
-from tagging.models import Tag, TaggedItem
 
 class ModelTagManager(models.Manager):
     """
     A manager for retrieving tags for a particular model.
     """
-    def get_query_set(self):
+    def get_queryset(self):
         ctype = ContentType.objects.get_for_model(self.model)
         return Tag.objects.filter(
             items__content_type__pk=ctype.pk).distinct()
@@ -25,6 +26,7 @@ def related(self, tags, *args, **kwargs):
     def usage(self, *args, **kwargs):
         return Tag.objects.usage_for_model(self.model, *args, **kwargs)
 
+
 class ModelTaggedItemManager(models.Manager):
     """
     A manager for retrieving model instances based on their tags.
@@ -47,6 +49,7 @@ def with_any(self, tags, queryset=None):
         else:
             return TaggedItem.objects.get_union_by_model(queryset, tags)
 
+
 class TagDescriptor(object):
     """
     A descriptor which provides access to a ``ModelTagManager`` for

tagging/migrations/0001_initial.py

@@ -0,0 +1,54 @@
+from django.db import models
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contenttypes', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Tag',
+            fields=[
+                ('id', models.AutoField(
+                    verbose_name='ID', serialize=False,
+                    auto_created=True, primary_key=True)),
+                ('name', models.CharField(
+                    unique=True, max_length=50,
+                    verbose_name='name', db_index=True)),
+            ],
+            options={
+                'ordering': ('name',),
+                'verbose_name': 'tag',
+                'verbose_name_plural': 'tags',
+            },
+        ),
+        migrations.CreateModel(
+            name='TaggedItem',
+            fields=[
+                ('id', models.AutoField(
+                    verbose_name='ID', serialize=False,
+                    auto_created=True, primary_key=True)),
+                ('object_id', models.PositiveIntegerField(
+                    verbose_name='object id', db_index=True)),
+                ('content_type', models.ForeignKey(
+                    verbose_name='content type',
+                    on_delete=models.SET_NULL,
+                    to='contenttypes.ContentType')),
+                ('tag', models.ForeignKey(
+                    related_name='items', verbose_name='tag',
+                    on_delete=models.SET_NULL,
+                    to='tagging.Tag')),
+            ],
+            options={
+                'verbose_name': 'tagged item',
+                'verbose_name_plural': 'tagged items',
+            },
+        ),
+        migrations.AlterUniqueTogether(
+            name='taggeditem',
+            unique_together=set([('tag', 'content_type', 'object_id')]),
+        ),
+    ]