# Authors: Olivier Guilyardi <olivier@samalyse.com>
# Guillaume Pellerin <yomguy@parisson.com>
-__all__ = ['ModelCore', 'MetaCore', 'DurationField', 'Duration', 'WeakForeignKey',
- 'EnhancedModel', 'CharField', 'TextField', 'IntegerField', 'BooleanField',
+__all__ = ['ModelCore', 'MetaCore', 'DurationField', 'Duration', 'WeakForeignKey',
+ 'EnhancedModel', 'CharField', 'TextField', 'IntegerField', 'BooleanField',
'DateTimeField', 'FileField', 'ForeignKey', 'FloatField', 'DateField',
'RequiredFieldError', 'CoreQuerySet', 'CoreManager', 'word_search_q']
from django.utils.translation import ugettext_lazy as _
import re
from django.core.exceptions import ObjectDoesNotExist
+from south.modelsinspector import add_introspection_rules
-
class Duration(object):
"""Represent a time duration"""
def __init__(self, *args, **kwargs):
def __decorate(self, method, other):
if isinstance(other, Duration):
res = method(other._delta)
- else:
+ else:
res = method(other)
if type(res) == datetime.timedelta:
return Duration(res)
-
+
return res
-
+
def __add__(self, other):
return self.__decorate(self._delta.__add__, other)
hours = self._delta.days * 24 + self._delta.seconds / 3600
minutes = (self._delta.seconds % 3600) / 60
seconds = self._delta.seconds % 60
-
+
return "%.2d:%.2d:%.2d" % (hours, minutes, seconds)
@staticmethod
def as_seconds(self):
return self._delta.days * 24 * 3600 + self._delta.seconds
-
+
def normalize_field(args, default_value=None):
"""Normalize field constructor arguments, so that the field is marked blank=True
and has a default value by default.
-
+
This behaviour can be disabled by passing the special argument required=True.
The default value can also be overriden with the default=value argument.
elif default_value is not None:
args['default'] = default_value
- return args
+ return args
# The following is based on Django TimeField
class DurationField(models.Field):
"""Duration Django model field. Essentially the same as a TimeField, but
with values over 24h allowed.
-
- The constructor arguments are also normalized with normalize_field().
+
+ The constructor arguments are also normalized with normalize_field().
"""
description = _("Duration")
return Duration.fromstr(value)
except ValueError:
raise exceptions.ValidationError(self.error_messages['invalid'])
-
+
def get_prep_value(self, value):
return self.to_python(value)
defaults = {'form_class': forms.CharField}
defaults.update(kwargs)
return super(DurationField, self).formfield(**defaults)
-
+
class ForeignKey(models.ForeignKey):
"""The constructor arguments of this ForeignKey are normalized
with normalize_field(), however the field is marked required by default
if not kwargs.get('null'):
kwargs['required'] = True
- super(ForeignKey, self).__init__(to, **normalize_field(kwargs, 0))
+ super(ForeignKey, self).__init__(to, **normalize_field(kwargs, 0))
class WeakForeignKey(ForeignKey):
"""A weak foreign key is the same as foreign key but without cascading
delete. Instead the reference is set to null when the referenced record
get deleted. This emulates the ON DELETE SET NULL sql behaviour.
-
+
This field is automatically allowed to be null, there's no need to pass
- null=True.
+ null=True.
The constructor arguments are normalized with normalize_field() by the
parent ForeignKey
def __init__(self, to, **kwargs):
kwargs['null'] = True
super(WeakForeignKey, self).__init__(to, **kwargs)
-
+
class EnhancedQuerySet(models.query.QuerySet):
"""QuerySet with added functionalities such as WeakForeignKey handling"""
q.delete()
i += CHUNK
-
+
super(EnhancedQuerySet, self).delete()
-
+
class EnhancedManager(models.Manager):
"""Manager which is bound to EnhancedQuerySet"""
def get_query_set(self):
return EnhancedQuerySet(self.model)
-
+
class EnhancedModel(models.Model):
"""Base model class with added functionality. See EnhancedQuerySet"""
def delete(self):
if not self.pk:
raise Exception("Can't delete without a primary key")
- self.__class__.objects.filter(pk=self.pk).delete()
+ self.__class__.objects.filter(pk=self.pk).delete()
class Meta:
abstract = True
class CharField(models.CharField):
"""This is a CharField with a default max_length of 250.
-
+
The arguments are also normalized with normalize_field()"""
def __init__(self, *args, **kwargs):
element.appendChild(doc.createTextNode(value))
top.appendChild(element)
return doc
-
- def to_dict(self):
+
+ def to_dict(self):
"Return model fields as a dict of name/value pairs"
fields_dict = {}
for field in self._meta.fields:
fields_dict[field.name] = getattr(self, field.name)
return fields_dict
- def to_list(self):
+ def to_list(self):
"Return model fields as a list"
fields_list = []
for field in self._meta.fields:
def word_search(self, field, pattern):
return self.filter(word_search_q(field, pattern))
-
+
def _by_change_time(self, type, from_time = None, until_time = None):
"Search between two revision dates"
table = self.model._meta.db_table
return super(CoreManager, self).get(**args)
return super(CoreManager, self).get(**kwargs)
-
+
+
+# South introspection rules
+add_introspection_rules([], ["^telemeta\.models\.core\.CharField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.TextField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.FileField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.IntegerField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.BooleanField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.DateTimeField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.DateField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.FloatField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.DurationField"])
+add_introspection_rules([], ["^telemeta\.models\.core\.ForeignKey"])
+add_introspection_rules([], ["^telemeta\.models\.core\.WeakForeignKey"])
+
projects / telemeta.git / commitdiff