diff options
Diffstat (limited to 'django/db/models')
| -rw-r--r-- | django/db/models/fields/__init__.py | 128 | ||||
| -rw-r--r-- | django/db/models/fields/generic.py | 4 | ||||
| -rw-r--r-- | django/db/models/fields/related.py | 132 | ||||
| -rw-r--r-- | django/db/models/manager.py | 8 | ||||
| -rw-r--r-- | django/db/models/manipulators.py | 8 | ||||
| -rw-r--r-- | django/db/models/query.py | 102 |
6 files changed, 277 insertions, 105 deletions
diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py index 8e8d68aad5..024fa95b8e 100644 --- a/django/db/models/fields/__init__.py +++ b/django/db/models/fields/__init__.py @@ -2,7 +2,8 @@ from django.db.models import signals from django.dispatch import dispatcher from django.conf import settings from django.core import validators -from django import forms +from django import oldforms +from django import newforms as forms from django.core.exceptions import ObjectDoesNotExist from django.utils.functional import curry from django.utils.itercompat import tee @@ -206,10 +207,10 @@ class Field(object): if self.choices: if self.radio_admin: - field_objs = [forms.RadioSelectField] + field_objs = [oldforms.RadioSelectField] params['ul_class'] = get_ul_class(self.radio_admin) else: - field_objs = [forms.SelectField] + field_objs = [oldforms.SelectField] params['choices'] = self.get_choices_default() else: @@ -218,7 +219,7 @@ class Field(object): def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False, follow=True): """ - Returns a list of forms.FormField instances for this field. It + Returns a list of oldforms.FormField instances for this field. It calculates the choices at runtime, not at compile time. name_prefix is a prefix to prepend to the "field_name" argument. @@ -333,6 +334,16 @@ class Field(object): return self._choices choices = property(_get_choices) + def formfield(self, **kwargs): + "Returns a django.newforms.Field instance for this database Field." + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.CharField(**defaults) + + def value_from_object(self, obj): + "Returns the value of this field in the given model instance." + return getattr(obj, self.attname) + class AutoField(Field): empty_strings_allowed = False def __init__(self, *args, **kwargs): @@ -354,7 +365,7 @@ class AutoField(Field): return Field.get_manipulator_fields(self, opts, manipulator, change, name_prefix, rel, follow) def get_manipulator_field_objs(self): - return [forms.HiddenField] + return [oldforms.HiddenField] def get_manipulator_new_data(self, new_data, rel=False): # Never going to be called @@ -369,6 +380,9 @@ class AutoField(Field): super(AutoField, self).contribute_to_class(cls, name) cls._meta.has_auto_field = True + def formfield(self, **kwargs): + return None + class BooleanField(Field): def __init__(self, *args, **kwargs): kwargs['blank'] = True @@ -381,11 +395,16 @@ class BooleanField(Field): raise validators.ValidationError, gettext("This value must be either True or False.") def get_manipulator_field_objs(self): - return [forms.CheckboxField] + return [oldforms.CheckboxField] + + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.BooleanField(**defaults) class CharField(Field): def get_manipulator_field_objs(self): - return [forms.TextField] + return [oldforms.TextField] def to_python(self, value): if isinstance(value, basestring): @@ -397,10 +416,15 @@ class CharField(Field): raise validators.ValidationError, gettext_lazy("This field cannot be null.") return str(value) + def formfield(self, **kwargs): + defaults = {'max_length': self.maxlength, 'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.CharField(**defaults) + # TODO: Maybe move this into contrib, because it's specialized. class CommaSeparatedIntegerField(CharField): def get_manipulator_field_objs(self): - return [forms.CommaSeparatedIntegerField] + return [oldforms.CommaSeparatedIntegerField] class DateField(Field): empty_strings_allowed = False @@ -462,12 +486,17 @@ class DateField(Field): return Field.get_db_prep_save(self, value) def get_manipulator_field_objs(self): - return [forms.DateField] + return [oldforms.DateField] - def flatten_data(self, follow, obj = None): + def flatten_data(self, follow, obj=None): val = self._get_val_from_obj(obj) return {self.attname: (val is not None and val.strftime("%Y-%m-%d") or '')} + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.DateField(**defaults) + class DateTimeField(DateField): def to_python(self, value): if isinstance(value, datetime.datetime): @@ -503,7 +532,7 @@ class DateTimeField(DateField): return Field.get_db_prep_lookup(self, lookup_type, value) def get_manipulator_field_objs(self): - return [forms.DateField, forms.TimeField] + return [oldforms.DateField, oldforms.TimeField] def get_manipulator_field_names(self, name_prefix): return [name_prefix + self.name + '_date', name_prefix + self.name + '_time'] @@ -526,6 +555,11 @@ class DateTimeField(DateField): return {date_field: (val is not None and val.strftime("%Y-%m-%d") or ''), time_field: (val is not None and val.strftime("%H:%M:%S") or '')} + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.DateTimeField(**defaults) + class EmailField(CharField): def __init__(self, *args, **kwargs): kwargs['maxlength'] = 75 @@ -535,11 +569,16 @@ class EmailField(CharField): return "CharField" def get_manipulator_field_objs(self): - return [forms.EmailField] + return [oldforms.EmailField] def validate(self, field_data, all_data): validators.isValidEmail(field_data, all_data) + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.EmailField(**defaults) + class FileField(Field): def __init__(self, verbose_name=None, name=None, upload_to='', **kwargs): self.upload_to = upload_to @@ -599,7 +638,7 @@ class FileField(Field): os.remove(file_name) def get_manipulator_field_objs(self): - return [forms.FileUploadField, forms.HiddenField] + return [oldforms.FileUploadField, oldforms.HiddenField] def get_manipulator_field_names(self, name_prefix): return [name_prefix + self.name + '_file', name_prefix + self.name] @@ -627,7 +666,7 @@ class FilePathField(Field): Field.__init__(self, verbose_name, name, **kwargs) def get_manipulator_field_objs(self): - return [curry(forms.FilePathField, path=self.path, match=self.match, recursive=self.recursive)] + return [curry(oldforms.FilePathField, path=self.path, match=self.match, recursive=self.recursive)] class FloatField(Field): empty_strings_allowed = False @@ -636,7 +675,7 @@ class FloatField(Field): Field.__init__(self, verbose_name, name, **kwargs) def get_manipulator_field_objs(self): - return [curry(forms.FloatField, max_digits=self.max_digits, decimal_places=self.decimal_places)] + return [curry(oldforms.FloatField, max_digits=self.max_digits, decimal_places=self.decimal_places)] class ImageField(FileField): def __init__(self, verbose_name=None, name=None, width_field=None, height_field=None, **kwargs): @@ -644,7 +683,7 @@ class ImageField(FileField): FileField.__init__(self, verbose_name, name, **kwargs) def get_manipulator_field_objs(self): - return [forms.ImageUploadField, forms.HiddenField] + return [oldforms.ImageUploadField, oldforms.HiddenField] def contribute_to_class(self, cls, name): super(ImageField, self).contribute_to_class(cls, name) @@ -670,7 +709,12 @@ class ImageField(FileField): class IntegerField(Field): empty_strings_allowed = False def get_manipulator_field_objs(self): - return [forms.IntegerField] + return [oldforms.IntegerField] + + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.IntegerField(**defaults) class IPAddressField(Field): def __init__(self, *args, **kwargs): @@ -678,7 +722,7 @@ class IPAddressField(Field): Field.__init__(self, *args, **kwargs) def get_manipulator_field_objs(self): - return [forms.IPAddressField] + return [oldforms.IPAddressField] def validate(self, field_data, all_data): validators.isValidIPAddress4(field_data, None) @@ -689,22 +733,22 @@ class NullBooleanField(Field): Field.__init__(self, *args, **kwargs) def get_manipulator_field_objs(self): - return [forms.NullBooleanField] + return [oldforms.NullBooleanField] class PhoneNumberField(IntegerField): def get_manipulator_field_objs(self): - return [forms.PhoneNumberField] + return [oldforms.PhoneNumberField] def validate(self, field_data, all_data): validators.isValidPhone(field_data, all_data) class PositiveIntegerField(IntegerField): def get_manipulator_field_objs(self): - return [forms.PositiveIntegerField] + return [oldforms.PositiveIntegerField] class PositiveSmallIntegerField(IntegerField): def get_manipulator_field_objs(self): - return [forms.PositiveSmallIntegerField] + return [oldforms.PositiveSmallIntegerField] class SlugField(Field): def __init__(self, *args, **kwargs): @@ -716,15 +760,20 @@ class SlugField(Field): Field.__init__(self, *args, **kwargs) def get_manipulator_field_objs(self): - return [forms.TextField] + return [oldforms.TextField] class SmallIntegerField(IntegerField): def get_manipulator_field_objs(self): - return [forms.SmallIntegerField] + return [oldforms.SmallIntegerField] class TextField(Field): def get_manipulator_field_objs(self): - return [forms.LargeTextField] + return [oldforms.LargeTextField] + + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'widget': forms.Textarea, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.CharField(**defaults) class TimeField(Field): empty_strings_allowed = False @@ -760,24 +809,39 @@ class TimeField(Field): return Field.get_db_prep_save(self, value) def get_manipulator_field_objs(self): - return [forms.TimeField] + return [oldforms.TimeField] def flatten_data(self,follow, obj = None): val = self._get_val_from_obj(obj) return {self.attname: (val is not None and val.strftime("%H:%M:%S") or '')} -class URLField(Field): + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.TimeField(**defaults) + +class URLField(CharField): def __init__(self, verbose_name=None, name=None, verify_exists=True, **kwargs): + kwargs['maxlength'] = kwargs.get('maxlength', 200) if verify_exists: kwargs.setdefault('validator_list', []).append(validators.isExistingURL) - Field.__init__(self, verbose_name, name, **kwargs) + self.verify_exists = verify_exists + CharField.__init__(self, verbose_name, name, **kwargs) def get_manipulator_field_objs(self): - return [forms.URLField] + return [oldforms.URLField] + + def get_internal_type(self): + return "CharField" + + def formfield(self, **kwargs): + defaults = {'required': not self.blank, 'verify_exists': self.verify_exists, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.URLField(**defaults) class USStateField(Field): def get_manipulator_field_objs(self): - return [forms.USStateField] + return [oldforms.USStateField] class XMLField(TextField): def __init__(self, verbose_name=None, name=None, schema_path=None, **kwargs): @@ -788,7 +852,7 @@ class XMLField(TextField): return "TextField" def get_manipulator_field_objs(self): - return [curry(forms.XMLLargeTextField, schema_path=self.schema_path)] + return [curry(oldforms.XMLLargeTextField, schema_path=self.schema_path)] class OrderingField(IntegerField): empty_strings_allowed=False @@ -801,4 +865,4 @@ class OrderingField(IntegerField): return "IntegerField" def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False, follow=True): - return [forms.HiddenField(name_prefix + self.name)] + return [oldforms.HiddenField(name_prefix + self.name)] diff --git a/django/db/models/fields/generic.py b/django/db/models/fields/generic.py index 7d7651029c..1ad8346e42 100644 --- a/django/db/models/fields/generic.py +++ b/django/db/models/fields/generic.py @@ -2,7 +2,7 @@ Classes allowing "generic" relations through ContentType and object-id fields. """ -from django import forms +from django import oldforms from django.core.exceptions import ObjectDoesNotExist from django.db import backend from django.db.models import signals @@ -98,7 +98,7 @@ class GenericRelation(RelatedField, Field): def get_manipulator_field_objs(self): choices = self.get_choices_default() - return [curry(forms.SelectMultipleField, size=min(max(len(choices), 5), 15), choices=choices)] + return [curry(oldforms.SelectMultipleField, size=min(max(len(choices), 5), 15), choices=choices)] def get_choices_default(self): return Field.get_choices(self, include_blank=False) diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py index bd9262d55a..b517747735 100644 --- a/django/db/models/fields/related.py +++ b/django/db/models/fields/related.py @@ -2,10 +2,12 @@ from django.db import backend, transaction from django.db.models import signals, get_model from django.db.models.fields import AutoField, Field, IntegerField, get_ul_class from django.db.models.related import RelatedObject +from django.utils.text import capfirst from django.utils.translation import gettext_lazy, string_concat, ngettext from django.utils.functional import curry from django.core import validators -from django import forms +from django import oldforms +from django import newforms as forms from django.dispatch import dispatcher # For Python 2.3 @@ -256,8 +258,7 @@ class ForeignRelatedObjectsDescriptor(object): # Otherwise, just move the named objects into the set. if self.related.field.null: manager.clear() - for obj in value: - manager.add(obj) + manager.add(*value) def create_many_related_manager(superclass): """Creates a manager that subclasses 'superclass' (which is a Manager) @@ -315,28 +316,36 @@ def create_many_related_manager(superclass): # join_table: name of the m2m link table # source_col_name: the PK colname in join_table for the source object # target_col_name: the PK colname in join_table for the target object - # *objs - objects to add + # *objs - objects to add. Either object instances, or primary keys of object instances. from django.db import connection - # Add the newly created or already existing objects to the join table. - # First find out which items are already added, to avoid adding them twice - new_ids = set([obj._get_pk_val() for obj in objs]) - cursor = connection.cursor() - cursor.execute("SELECT %s FROM %s WHERE %s = %%s AND %s IN (%s)" % \ - (target_col_name, self.join_table, source_col_name, - target_col_name, ",".join(['%s'] * len(new_ids))), - [self._pk_val] + list(new_ids)) - if cursor.rowcount is not None and cursor.rowcount != 0: - existing_ids = set([row[0] for row in cursor.fetchmany(cursor.rowcount)]) - else: - existing_ids = set() + # If there aren't any objects, there is nothing to do. + if objs: + # Check that all the objects are of the right type + new_ids = set() + for obj in objs: + if isinstance(obj, self.model): + new_ids.add(obj._get_pk_val()) + else: + new_ids.add(obj) + # Add the newly created or already existing objects to the join table. + # First find out which items are already added, to avoid adding them twice + cursor = connection.cursor() + cursor.execute("SELECT %s FROM %s WHERE %s = %%s AND %s IN (%s)" % \ + (target_col_name, self.join_table, source_col_name, + target_col_name, ",".join(['%s'] * len(new_ids))), + [self._pk_val] + list(new_ids)) + if cursor.rowcount is not None and cursor.rowcount != 0: + existing_ids = set([row[0] for row in cursor.fetchmany(cursor.rowcount)]) + else: + existing_ids = set() - # Add the ones that aren't there already - for obj_id in (new_ids - existing_ids): - cursor.execute("INSERT INTO %s (%s, %s) VALUES (%%s, %%s)" % \ - (self.join_table, source_col_name, target_col_name), - [self._pk_val, obj_id]) - transaction.commit_unless_managed() + # Add the ones that aren't there already + for obj_id in (new_ids - existing_ids): + cursor.execute("INSERT INTO %s (%s, %s) VALUES (%%s, %%s)" % \ + (self.join_table, source_col_name, target_col_name), + [self._pk_val, obj_id]) + transaction.commit_unless_managed() def _remove_items(self, source_col_name, target_col_name, *objs): # source_col_name: the PK colname in join_table for the source object @@ -344,16 +353,22 @@ def create_many_related_manager(superclass): # *objs - objects to remove from django.db import connection - for obj in objs: - if not isinstance(obj, self.model): - raise ValueError, "objects to remove() must be %s instances" % self.model._meta.object_name - # Remove the specified objects from the join table - cursor = connection.cursor() - for obj in objs: - cursor.execute("DELETE FROM %s WHERE %s = %%s AND %s = %%s" % \ - (self.join_table, source_col_name, target_col_name), - [self._pk_val, obj._get_pk_val()]) - transaction.commit_unless_managed() + # If there aren't any objects, there is nothing to do. + if objs: + # Check that all the objects are of the right type + old_ids = set() + for obj in objs: + if isinstance(obj, self.model): + old_ids.add(obj._get_pk_val()) + else: + old_ids.add(obj) + # Remove the specified objects from the join table + cursor = connection.cursor() + cursor.execute("DELETE FROM %s WHERE %s = %%s AND %s IN (%s)" % \ + (self.join_table, source_col_name, + target_col_name, ",".join(['%s'] * len(old_ids))), + [self._pk_val] + list(old_ids)) + transaction.commit_unless_managed() def _clear_items(self, source_col_name): # source_col_name: the PK colname in join_table for the source object @@ -405,8 +420,7 @@ class ManyRelatedObjectsDescriptor(object): manager = self.__get__(instance) manager.clear() - for obj in value: - manager.add(obj) + manager.add(*value) class ReverseManyRelatedObjectsDescriptor(object): # This class provides the functionality that makes the related-object @@ -447,8 +461,7 @@ class ReverseManyRelatedObjectsDescriptor(object): manager = self.__get__(instance) manager.clear() - for obj in value: - manager.add(obj) + manager.add(*value) class ForeignKey(RelatedField, Field): empty_strings_allowed = False @@ -493,13 +506,13 @@ class ForeignKey(RelatedField, Field): params['validator_list'].append(curry(manipulator_valid_rel_key, self, manipulator)) else: if self.radio_admin: - field_objs = [forms.RadioSelectField] + field_objs = [oldforms.RadioSelectField] params['ul_class'] = get_ul_class(self.radio_admin) else: if self.null: - field_objs = [forms.NullSelectField] + field_objs = [oldforms.NullSelectField] else: - field_objs = [forms.SelectField] + field_objs = [oldforms.SelectField] params['choices'] = self.get_choices_default() return field_objs, params @@ -508,7 +521,7 @@ class ForeignKey(RelatedField, Field): if self.rel.raw_id_admin and not isinstance(rel_field, AutoField): return rel_field.get_manipulator_field_objs() else: - return [forms.IntegerField] + return [oldforms.IntegerField] def get_db_prep_save(self, value): if value == '' or value == None: @@ -539,6 +552,11 @@ class ForeignKey(RelatedField, Field): def contribute_to_related_class(self, cls, related): setattr(cls, related.get_accessor_name(), ForeignRelatedObjectsDescriptor(related)) + def formfield(self, **kwargs): + defaults = {'choices': self.get_choices_default(), 'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.ChoiceField(**defaults) + class OneToOneField(RelatedField, IntegerField): def __init__(self, to, to_field=None, **kwargs): try: @@ -581,13 +599,13 @@ class OneToOneField(RelatedField, IntegerField): params['validator_list'].append(curry(manipulator_valid_rel_key, self, manipulator)) else: if self.radio_admin: - field_objs = [forms.RadioSelectField] + field_objs = [oldforms.RadioSelectField] params['ul_class'] = get_ul_class(self.radio_admin) else: if self.null: - field_objs = [forms.NullSelectField] + field_objs = [oldforms.NullSelectField] else: - field_objs = [forms.SelectField] + field_objs = [oldforms.SelectField] params['choices'] = self.get_choices_default() return field_objs, params @@ -600,6 +618,11 @@ class OneToOneField(RelatedField, IntegerField): if not cls._meta.one_to_one_field: cls._meta.one_to_one_field = self + def formfield(self, **kwargs): + defaults = {'choices': self.get_choices_default(), 'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.ChoiceField(**kwargs) + class ManyToManyField(RelatedField, Field): def __init__(self, to, **kwargs): kwargs['verbose_name'] = kwargs.get('verbose_name', None) @@ -610,6 +633,7 @@ class ManyToManyField(RelatedField, Field): limit_choices_to=kwargs.pop('limit_choices_to', None), raw_id_admin=kwargs.pop('raw_id_admin', False), symmetrical=kwargs.pop('symmetrical', True)) + self.db_table = kwargs.pop('db_table', None) if kwargs["rel"].raw_id_admin: kwargs.setdefault("validator_list", []).append(self.isValidIDList) Field.__init__(self, **kwargs) @@ -622,17 +646,20 @@ class ManyToManyField(RelatedField, Field): def get_manipulator_field_objs(self): if self.rel.raw_id_admin: - return [forms.RawIdAdminField] + return [oldforms.RawIdAdminField] else: choices = self.get_choices_default() - return [curry(forms.SelectMultipleField, size=min(max(len(choices), 5), 15), choices=choices)] + return [curry(oldforms.SelectMultipleField, size=min(max(len(choices), 5), 15), choices=choices)] def get_choices_default(self): return Field.get_choices(self, include_blank=False) def _get_m2m_db_table(self, opts): "Function that can be curried to provide the m2m table name for this relation" - return '%s_%s' % (opts.db_table, self.name) + if self.db_table: + return self.db_table + else: + return '%s_%s' % (opts.db_table, self.name) def _get_m2m_column_name(self, related): "Function that can be curried to provide the source column name for the m2m table" @@ -706,6 +733,19 @@ class ManyToManyField(RelatedField, Field): def set_attributes_from_rel(self): pass + def value_from_object(self, obj): + "Returns the value of this field in the given model instance." + return getattr(obj, self.attname).all() + + def formfield(self, **kwargs): + # If initial is passed in, it's a list of related objects, but the + # MultipleChoiceField takes a list of IDs. + if kwargs.get('initial') is not None: + kwargs['initial'] = [i._get_pk_val() for i in kwargs['initial']] + defaults = {'choices': self.get_choices_default(), 'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text} + defaults.update(kwargs) + return forms.MultipleChoiceField(**defaults) + class ManyToOneRel(object): 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, diff --git a/django/db/models/manager.py b/django/db/models/manager.py index 6005874516..b60eed262a 100644 --- a/django/db/models/manager.py +++ b/django/db/models/manager.py @@ -1,4 +1,4 @@ -from django.db.models.query import QuerySet +from django.db.models.query import QuerySet, EmptyQuerySet from django.dispatch import dispatcher from django.db.models import signals from django.db.models.fields import FieldDoesNotExist @@ -41,12 +41,18 @@ class Manager(object): ####################### # PROXIES TO QUERYSET # ####################### + + def get_empty_query_set(self): + return EmptyQuerySet(self.model) def get_query_set(self): """Returns a new QuerySet object. Subclasses can override this method to easily customise the behaviour of the Manager. """ return QuerySet(self.model) + + def none(self): + return self.get_empty_query_set() def all(self): return self.get_query_set() diff --git a/django/db/models/manipulators.py b/django/db/models/manipulators.py index c61e82f813..aea3aa70a7 100644 --- a/django/db/models/manipulators.py +++ b/django/db/models/manipulators.py @@ -1,5 +1,5 @@ from django.core.exceptions import ObjectDoesNotExist -from django import forms +from django import oldforms from django.core import validators from django.db.models.fields import FileField, AutoField from django.dispatch import dispatcher @@ -40,7 +40,7 @@ class ManipulatorDescriptor(object): self.man._prepare(model) return self.man -class AutomaticManipulator(forms.Manipulator): +class AutomaticManipulator(oldforms.Manipulator): def _prepare(cls, model): cls.model = model cls.manager = model._default_manager @@ -76,7 +76,7 @@ class AutomaticManipulator(forms.Manipulator): # Add field for ordering. if self.change and self.opts.get_ordered_objects(): - self.fields.append(forms.CommaSeparatedIntegerField(field_name="order_")) + self.fields.append(oldforms.CommaSeparatedIntegerField(field_name="order_")) def save(self, new_data): # TODO: big cleanup when core fields go -> use recursive manipulators. @@ -308,7 +308,7 @@ def manipulator_validator_unique_together(field_name_list, opts, self, field_dat def manipulator_validator_unique_for_date(from_field, date_field, opts, lookup_type, self, field_data, all_data): from django.db.models.fields.related import ManyToOneRel date_str = all_data.get(date_field.get_manipulator_field_names('')[0], None) - date_val = forms.DateField.html2python(date_str) + date_val = oldforms.DateField.html2python(date_str) if date_val is None: return # Date was invalid. This will be caught by another validator. lookup_kwargs = {'%s__year' % date_field.name: date_val.year} diff --git a/django/db/models/query.py b/django/db/models/query.py index 53ed63ae5b..51fa334e63 100644 --- a/django/db/models/query.py +++ b/django/db/models/query.py @@ -1,5 +1,6 @@ from django.db import backend, connection, transaction from django.db.models.fields import DateField, FieldDoesNotExist +from django.db.models.fields.generic import GenericRelation from django.db.models import signals from django.dispatch import dispatcher from django.utils.datastructures import SortedDict @@ -25,6 +26,9 @@ QUERY_TERMS = ( # Larger values are slightly faster at the expense of more storage space. GET_ITERATOR_CHUNK_SIZE = 100 +class EmptyResultSet(Exception): + pass + #################### # HELPER FUNCTIONS # #################### @@ -168,7 +172,12 @@ class QuerySet(object): extra_select = self._select.items() cursor = connection.cursor() - select, sql, params = self._get_sql_clause() + + try: + select, sql, params = self._get_sql_clause() + except EmptyResultSet: + raise StopIteration + cursor.execute("SELECT " + (self._distinct and "DISTINCT " or "") + ",".join(select) + sql, params) fill_cache = self._select_related index_end = len(self.model._meta.fields) @@ -192,7 +201,12 @@ class QuerySet(object): counter._offset = None counter._limit = None counter._select_related = False - select, sql, params = counter._get_sql_clause() + + try: + select, sql, params = counter._get_sql_clause() + except EmptyResultSet: + return 0 + cursor = connection.cursor() if self._distinct: id_col = "%s.%s" % (backend.quote_name(self.model._meta.db_table), @@ -523,7 +537,12 @@ class ValuesQuerySet(QuerySet): field_names = [f.attname for f in self.model._meta.fields] cursor = connection.cursor() - select, sql, params = self._get_sql_clause() + + try: + select, sql, params = self._get_sql_clause() + except EmptyResultSet: + raise StopIteration + select = ['%s.%s' % (backend.quote_name(self.model._meta.db_table), backend.quote_name(c)) for c in columns] cursor.execute("SELECT " + (self._distinct and "DISTINCT " or "") + ",".join(select) + sql, params) while 1: @@ -545,7 +564,12 @@ class DateQuerySet(QuerySet): if self._field.null: self._where.append('%s.%s IS NOT NULL' % \ (backend.quote_name(self.model._meta.db_table), backend.quote_name(self._field.column))) - select, sql, params = self._get_sql_clause() + + try: + select, sql, params = self._get_sql_clause() + except EmptyResultSet: + raise StopIteration + sql = 'SELECT %s %s GROUP BY 1 ORDER BY 1 %s' % \ (backend.get_date_trunc_sql(self._kind, '%s.%s' % (backend.quote_name(self.model._meta.db_table), backend.quote_name(self._field.column))), sql, self._order) @@ -562,6 +586,25 @@ class DateQuerySet(QuerySet): c._kind = self._kind c._order = self._order return c + +class EmptyQuerySet(QuerySet): + def __init__(self, model=None): + super(EmptyQuerySet, self).__init__(model) + self._result_cache = [] + + def iterator(self): + raise StopIteration + + def count(self): + return 0 + + def delete(self): + pass + + def _clone(self, klass=None, **kwargs): + c = super(EmptyQuerySet, self)._clone(klass, **kwargs) + c._result_cache = [] + return c class QOperator(object): "Base class for QAnd and QOr" @@ -571,10 +614,14 @@ class QOperator(object): def get_sql(self, opts): joins, where, params = SortedDict(), [], [] for val in self.args: - joins2, where2, params2 = val.get_sql(opts) - joins.update(joins2) - where.extend(where2) - params.extend(params2) + try: + joins2, where2, params2 = val.get_sql(opts) + joins.update(joins2) + where.extend(where2) + params.extend(params2) + except EmptyResultSet: + if not isinstance(self, QOr): + raise EmptyResultSet if where: return joins, ['(%s)' % self.operator.join(where)], params return joins, [], params @@ -628,8 +675,11 @@ class QNot(Q): self.q = q def get_sql(self, opts): - joins, where, params = self.q.get_sql(opts) - where2 = ['(NOT (%s))' % " AND ".join(where)] + try: + joins, where, params = self.q.get_sql(opts) + where2 = ['(NOT (%s))' % " AND ".join(where)] + except EmptyResultSet: + return SortedDict(), [], [] return joins, where2, params def get_where_clause(lookup_type, table_prefix, field_name, value): @@ -641,7 +691,11 @@ def get_where_clause(lookup_type, table_prefix, field_name, value): except KeyError: pass if lookup_type == 'in': - return '%s%s IN (%s)' % (table_prefix, field_name, ','.join(['%s' for v in value])) + in_string = ','.join(['%s' for id in value]) + if in_string: + return '%s%s IN (%s)' % (table_prefix, field_name, in_string) + else: + raise EmptyResultSet elif lookup_type == 'range': return '%s%s BETWEEN %%s AND %%s' % (table_prefix, field_name) elif lookup_type in ('year', 'month', 'day'): @@ -926,18 +980,26 @@ def delete_objects(seen_objs): pk_list = [pk for pk,instance in seen_objs[cls]] for related in cls._meta.get_all_related_many_to_many_objects(): - for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE): - cursor.execute("DELETE FROM %s WHERE %s IN (%s)" % \ - (qn(related.field.m2m_db_table()), - qn(related.field.m2m_reverse_name()), - ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]])), - pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]) + if not isinstance(related.field, GenericRelation): + for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE): + cursor.execute("DELETE FROM %s WHERE %s IN (%s)" % \ + (qn(related.field.m2m_db_table()), + qn(related.field.m2m_reverse_name()), + ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]])), + pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]) for f in cls._meta.many_to_many: + if isinstance(f, GenericRelation): + from django.contrib.contenttypes.models import ContentType + query_extra = 'AND %s=%%s' % f.rel.to._meta.get_field(f.content_type_field_name).column + args_extra = [ContentType.objects.get_for_model(cls).id] + else: + query_extra = '' + args_extra = [] for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE): - cursor.execute("DELETE FROM %s WHERE %s IN (%s)" % \ + cursor.execute(("DELETE FROM %s WHERE %s IN (%s)" % \ (qn(f.m2m_db_table()), qn(f.m2m_column_name()), - ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]])), - pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]) + ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]]))) + query_extra, + pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE] + args_extra) for field in cls._meta.fields: if field.rel and field.null and field.rel.to in seen_objs: for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE): |