+from django import forms
from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes import generic
from django.core.exceptions import ObjectDoesNotExist
from philo.exceptions import AncestorDoesNotExist
from philo.models.fields import JSONField
-from philo.utils import ContentTypeRegistryLimiter
+from philo.utils import ContentTypeRegistryLimiter, ContentTypeSubclassLimiter
from philo.signals import entity_class_prepared
from philo.validators import json_validator
from UserDict import DictMixin
value_content_type_limiter.unregister_class(model)
-class JSONValue(models.Model):
+class AttributeValue(models.Model):
+ attribute = generic.GenericRelation('Attribute', content_type_field='value_content_type', object_id_field='value_object_id')
+ def apply_data(self, data):
+ raise NotImplementedError
+
+ def value_formfield(self, **kwargs):
+ raise NotImplementedError
+
+ def __unicode__(self):
+ return unicode(self.value)
+
+ class Meta:
+ abstract = True
+
+
+attribute_value_limiter = ContentTypeSubclassLimiter(AttributeValue)
+
+
+class JSONValue(AttributeValue):
value = JSONField() #verbose_name='Value (JSON)', help_text='This value must be valid JSON.')
def __unicode__(self):
return self.value_json
+ def value_formfield(self, **kwargs):
+ kwargs['initial'] = self.value_json
+ return self._meta.get_field('value').formfield(**kwargs)
+
+ def apply_data(self, cleaned_data):
+ self.value = cleaned_data.get('value', None)
+
class Meta:
app_label = 'philo'
-class ForeignKeyValue(models.Model):
+class ForeignKeyValue(AttributeValue):
content_type = models.ForeignKey(ContentType, related_name='foreign_key_value_set', limit_choices_to=value_content_type_limiter, verbose_name='Value type', null=True, blank=True)
object_id = models.PositiveIntegerField(verbose_name='Value ID', null=True, blank=True)
value = generic.GenericForeignKey()
- def __unicode__(self):
- return unicode(self.value)
+ def value_formfield(self, form_class=forms.ModelChoiceField, **kwargs):
+ if self.content_type is None:
+ return None
+ kwargs.update({'initial': self.object_id, 'required': False})
+ return form_class(self.content_type.model_class()._default_manager.all(), **kwargs)
+
+ def apply_data(self, cleaned_data):
+ if 'value' in cleaned_data and cleaned_data['value'] is not None:
+ self.value = cleaned_data['value']
+ else:
+ self.content_type = cleaned_data.get('content_type', None)
+ # If there is no value set in the cleaned data, clear the stored value.
+ self.object_id = None
class Meta:
app_label = 'philo'
-class ManyToManyValue(models.Model):
+class ManyToManyValue(AttributeValue):
+ # TODO: Change object_ids to object_pks.
content_type = models.ForeignKey(ContentType, related_name='many_to_many_value_set', limit_choices_to=value_content_type_limiter, verbose_name='Value type', null=True, blank=True)
object_ids = models.CommaSeparatedIntegerField(max_length=300, verbose_name='Value IDs', null=True, blank=True)
+ def get_object_id_list(self):
+ if not self.object_ids:
+ return []
+ else:
+ return self.object_ids.split(',')
+
def get_value(self):
- return self.content_type.model_class()._default_manager.filter(id__in=self.object_ids)
+ if self.content_type is None:
+ return None
+
+ return self.content_type.model_class()._default_manager.filter(id__in=self.get_object_id_list())
def set_value(self, value):
+ if value is None:
+ self.object_ids = ""
+ return
if not isinstance(value, models.query.QuerySet):
raise TypeError("Value must be a QuerySet.")
self.content_type = ContentType.objects.get_for_model(value.model)
- self.object_ids = ','.join(value.values_list('id', flat=True))
+ self.object_ids = ','.join([`value` for value in value.values_list('id', flat=True)])
value = property(get_value, set_value)
- def __unicode__(self):
- return unicode(self.value)
+ def value_formfield(self, form_class=forms.ModelMultipleChoiceField, **kwargs):
+ if self.content_type is None:
+ return None
+ kwargs.update({'initial': self.get_object_id_list(), 'required': False})
+ return form_class(self.content_type.model_class()._default_manager.all(), **kwargs)
+
+ def apply_data(self, cleaned_data):
+ if 'value' in cleaned_data and cleaned_data['value'] is not None:
+ self.value = cleaned_data['value']
+ else:
+ self.content_type = cleaned_data.get('content_type', None)
+ # If there is no value set in the cleaned data, clear the stored value.
+ self.object_ids = ""
class Meta:
app_label = 'philo'
-attribute_value_limiter = ContentTypeRegistryLimiter()
-attribute_value_limiter.register_class(JSONValue)
-attribute_value_limiter.register_class(ForeignKeyValue)
-attribute_value_limiter.register_class(ManyToManyValue)
-
-
class Attribute(models.Model):
entity_content_type = models.ForeignKey(ContentType, related_name='attribute_entity_set', verbose_name='Entity type')
entity_object_id = models.PositiveIntegerField(verbose_name='Entity ID')
key = models.CharField(max_length=255)
- def get_value_class(self, value):
- if isinstance(value, models.query.QuerySet):
- return ManyToManyValue
- elif isinstance(value, models.Model):
- return ForeignKeyValue
- else:
- return JSONValue
-
- def set_value(self, value):
- value_class = self.get_value_class(value)
-
- if self.value is None or value_class != self.value_content_type.model_class():
- if self.value is not None:
- self.value.delete()
- new_value = value_class()
- new_value.value = value
- new_value.save()
- self.value = new_value
- else:
- self.value.value = value
- self.value.save()
-
def __unicode__(self):
return u'"%s": %s' % (self.key, self.value)
self.attribute_set.filter(key__exact=key).delete()
del self._removed_attribute_registry[:]
- for key, value in self._added_attribute_registry.items():
+ for field, value in self._added_attribute_registry.items():
try:
- attribute = self.attribute_set.get(key__exact=key)
+ attribute = self.attribute_set.get(key__exact=field.key)
except Attribute.DoesNotExist:
attribute = Attribute()
attribute.entity = self
- attribute.key = key
- attribute.set_value(value)
+ attribute.key = field.key
+
+ field.set_attribute_value(attribute, value)
attribute.save()
self._added_attribute_registry.clear()
git.ithinksw.org / philo.git / blobdiff