magic-removal: slight event cleanup

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@1721 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/__init__.py

@@ -16,7 +16,7 @@ from django.db.models.fields.related import *
 
 from django.core.exceptions import ObjectDoesNotExist, ImproperlyConfigured
 from django.db.models.exceptions import FieldDoesNotExist, BadKeywordArguments
-from django.db.models.signals import Signals
+from django.db.models import signals
 
 
 # Admin stages.

django/db/models/base.py

@@ -1,12 +1,13 @@
-from django.db.models.manipulators import ModelAddManipulator, ModelChangeManipulator
+import django.db.models.manipulators
+import django.db.models.manager
+
 from django.db.models.fields import  AutoField
 from django.db.models.fields.related import OneToOne, ManyToOne
 from django.db.models.related import RelatedObject
-from django.db.models.manager import Manager
 from django.db.models.query import orderlist2sql
 from django.db.models.options import Options
 from django.db import connection, backend
-from django.db.models.signals import Signals
+from django.db.models import signals
 
 from django.dispatch import dispatcher
 from django.core.exceptions import ObjectDoesNotExist
@@ -133,7 +134,7 @@ class Model(object):
         return not self.__eq__(other)
 
     def __init__(self, *args, **kwargs):
-        dispatcher.send( signal = Signals.pre_init, sender = self.__class__, args=args, kwargs=kwargs)
+        dispatcher.send( signal = signals.pre_init, sender = self.__class__, args=args, kwargs=kwargs)
         if kwargs:
             for f in self._meta.fields:
                 if isinstance(f.rel, ManyToOne):
@@ -164,26 +165,15 @@ class Model(object):
                 raise TypeError, "'%s' is an invalid keyword argument for this function" % kwargs.keys()[0]
         for i, arg in enumerate(args):
             setattr(self, self._meta.fields[i].attname, arg)
-        dispatcher.send( signal = Signals.post_init, sender = self.__class__, instance=self)
+        dispatcher.send( signal = signals.post_init, sender = self.__class__, instance=self)
 
     def _prepare(cls):
-        if not hasattr(cls, '_default_manager'):
-            # Create the default manager, if needed.
-            if hasattr(cls, 'objects'):
-                raise ValueError, "Model %s must specify a custom Manager, because it has a field named 'objects'" % name
-            cls.add_to_class('objects',  Manager())
-        
-        cls.add_to_class(  'AddManipulator', ModelAddManipulator)
-        cls.add_to_class(  'ChangeManipulator', ModelChangeManipulator)
-
         # Creates some methods once self._meta has been populated.
-
         if cls._meta.order_with_respect_to:
             cls.get_next_in_order = curry(cls._get_next_or_previous_in_order, is_next=True)
             cls.get_previous_in_order = curry(cls._get_next_or_previous_in_order, is_next=False)
 
-        dispatcher.send( signal = Signals.class_prepared, sender = cls)
+        dispatcher.send( signal = signals.class_prepared, sender = cls)
-
         #RelatedField.do_pending_lookups(cls)
 
     _prepare = classmethod(_prepare)
@@ -192,7 +182,7 @@ class Model(object):
         # Run any pre-save hooks.
         if hasattr(self, '_pre_save'):
             self._pre_save()
-        dispatcher.send( signal=Signals.pre_save, sender = self.__class__, instance = self )
+        dispatcher.send( signal=signals.pre_save, sender = self.__class__, instance = self )
 
         non_pks = [f for f in self._meta.fields if not f.primary_key]
         cursor = connection.cursor()
@@ -237,7 +227,7 @@ class Model(object):
         connection.commit()
 
         # Run any post-save hooks.
-        dispatcher.send(signal=Signals.pre_save, sender = self.__class__, instance = self )
+        dispatcher.send(signal=signals.pre_save, sender = self.__class__, instance = self )
 
         if hasattr(self, '_post_save'):
             self._post_save()
@@ -292,7 +282,7 @@ class Model(object):
             if hasattr(instance, '_pre_delete'):
                 instance._pre_delete()
 
-            dispatcher.send(signal=Signals.pre_delete, sender = cls, instance = instance )
+            dispatcher.send(signal=signals.pre_delete, sender = cls, instance = instance )
 
             for related in cls._meta.get_all_related_many_to_many_objects():
                 cursor.execute("DELETE FROM %s WHERE %s=%%s" % \
@@ -322,7 +312,7 @@ class Model(object):
 
             setattr(self, cls._meta.pk.attname, None)
 
-            dispatcher.send(signal=Signals.post_delete, sender = cls, instance = instance )
+            dispatcher.send(signal=signals.post_delete, sender = cls, instance = instance )
 
             if hasattr(instance, '_post_delete'):
                 instance._post_delete()

django/db/models/fields/__init__.py

@@ -1,4 +1,4 @@
-from django.db.models.signals import Signals
+from django.db.models import signals
 from django.dispatch import dispatcher
 from django.conf import settings
 from django.core import formfields, validators
@@ -507,7 +507,7 @@ class FileField(Field):
         setattr(cls, 'save_%s_file' % self.name, curry(cls._save_FIELD_file, field=self))
         dispatcher.connect(
             self.delete_file,
-            signal = Signals.post_delete,
+            signal = signals.post_delete,
             sender = cls
         )
 

django/db/models/fields/related.py

@@ -3,7 +3,7 @@ from django.db.models.related import RelatedObject
 from django.utils.translation import gettext_lazy, string_concat
 from django.utils.functional import curry
 from django.core import formfields
-from django.db.models.signals import Signals
+from django.db.models import signals
 
 from django.dispatch import dispatcher
 
@@ -18,7 +18,7 @@ class RelatedField(object):
     
     dispatcher.connect(
         lambda sender: RelatedField.do_pending_lookups(sender) ,
-        signal = Signals.class_prepared,
+        signal = signals.class_prepared,
         weak = False)
     
     
@@ -320,13 +320,13 @@ class ManyToManyFieldNew(RelatedField):
         # We need to wait until the class we were in was fully defined
         dispatcher.connect(
             self.from_prepared,
-            signal = Signals.class_prepared,
+            signal = signals.class_prepared,
             sender = self.from_
         )
         
     def from_prepared(self):
         from django.db.models.base import Model
-                
+        
         class M2M(Model):
             __module__ = self.from_.__module__
         
@@ -340,6 +340,7 @@ class ManyToManyFieldNew(RelatedField):
         M2M.__name__ = "M2M_%s_%s_%s" % (self.name,self.from_.__name__, self.to.__name__)
 
 
+
 class ManyToOne:
     def __init__(self, to, field_name, num_in_admin=3, min_num_in_admin=None,
         max_num_in_admin=None, num_extra_on_change=1, edit_inline=False,

django/db/models/manager.py

@@ -3,11 +3,26 @@ from django.utils.functional import curry
 from django.db import backend, connection
 from django.db.models.query import Q, parse_lookup, fill_table_cache, get_cached_row
 from django.db.models.query import handle_legacy_orderlist, orderlist2sql, orderfield2column
+from django.dispatch import dispatcher
+from django.db.models import signals
 
 # Size of each "chunk" for get_iterator calls.
 # Larger values are slightly faster at the expense of more storage space.
 GET_ITERATOR_CHUNK_SIZE = 100
 
+def ensure_default_manager(sender):
+    cls = sender
+    if not hasattr(cls, '_default_manager'):
+        # Create the default manager, if needed.
+        if hasattr(cls, 'objects'):
+            raise ValueError, "Model %s must specify a custom Manager, because it has a field named 'objects'" % name
+        cls.add_to_class('objects',  Manager())
+
+dispatcher.connect(
+    ensure_default_manager,
+    signal=signals.class_prepared
+)
+
 class Manager(object):
         # Tracks each time a Manager instance is created. Used to retain order.
     creation_counter = 0

django/db/models/manipulators.py

@@ -1,6 +1,18 @@
 from django.core.exceptions import ObjectDoesNotExist
 from django.core.formfields import Manipulator
 from django.db.models.fields import FileField, AutoField
+from django.dispatch import dispatcher
+from django.db.models import signals
+
+def add_manipulators(sender):
+    cls = sender
+    cls.add_to_class(  'AddManipulator', ModelAddManipulator)
+    cls.add_to_class(  'ChangeManipulator', ModelChangeManipulator)
+
+dispatcher.connect(
+    add_manipulators,
+    signal=signals.class_prepared
+)
 
 class ManipulatorDescriptor(object):
     class empty:

django/db/models/signals.py

@@ -1,11 +1,10 @@
-class Signals(object):
+class_prepared = object()
-    class_prepared = object()
 
-    pre_init= object()
+pre_init= object()
-    post_init = object()
+post_init = object()
 
-    pre_save = object()
+pre_save = object()
-    post_save = object()
+post_save = object()
 
-    pre_delete = object()
+pre_delete = object()
-    post_delete = object()
+post_delete = object()