X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/aca27b0d4429d193b539f993eb629d28efd2157b..15c68a7a08349d807c767cce58fdbeec0dcc192d:/models/fields.py

diff --git a/models/fields.py b/models/fields.py
index 467befb..0289e57 100644
--- a/models/fields.py
+++ b/models/fields.py
@@ -1,96 +1,63 @@
+from django import forms
 from django.db import models
-from django.db.models import signals
-from django.core.exceptions import FieldError
-from philo.models.base import Entity
+from django.utils import simplejson as json
+from philo.forms.fields import JSONFormField
+from philo.validators import TemplateValidator, json_validator
 
 
-__all__ = ('AttributeField', 'RelationshipField')
+class TemplateField(models.TextField):
+	def __init__(self, allow=None, disallow=None, secure=True, *args, **kwargs):
+		super(TemplateField, self).__init__(*args, **kwargs)
+		self.validators.append(TemplateValidator(allow, disallow, secure))
 
 
-class AttributeFieldDescriptor(object):
+class JSONDescriptor(object):
 	def __init__(self, field):
 		self.field = field
 	
 	def __get__(self, instance, owner):
-		if instance:
-			if self.field.key in instance._added_attribute_registry:
-				return instance._added_attribute_registry[self.field.key]
-			if self.field.key in instance._removed_attribute_registry:
-				return None
-			try:
-				return instance.attributes[self.field.key]
-			except KeyError:
-				return None
-		else:
-			raise AttributeError('The \'%s\' attribute can only be accessed from %s instances.' % (self.field.name, owner.__name__))
+		if instance is None:
+			raise AttributeError # ?
+		
+		if self.field.name not in instance.__dict__:
+			json_string = getattr(instance, self.field.attname)
+			instance.__dict__[self.field.name] = json.loads(json_string)
+		
+		return instance.__dict__[self.field.name]
 	
 	def __set__(self, instance, value):
-		if self.field.key in instance._removed_attribute_registry:
-			instance._removed_attribute_registry.remove(self.field.key)
-		instance._added_attribute_registry[self.field.key] = value
+		instance.__dict__[self.field.name] = value
+		setattr(instance, self.field.attname, json.dumps(value))
 	
 	def __delete__(self, instance):
-		if self.field.key in instance._added_attribute_registry:
-			del instance._added_attribute_registry[self.field.key]
-		instance._removed_attribute_registry.append(self.field.key)
+		del(instance.__dict__[self.field.name])
+		setattr(instance, self.field.attname, json.dumps(None))
 
 
-class AttributeField(object):
-	def __init__(self, key):
-		self.key = key
+class JSONField(models.TextField):
+	default_validators = [json_validator]
 	
-	def actually_contribute_to_class(self, sender, **kwargs):
-		setattr(sender, self.name, AttributeFieldDescriptor(self))
+	def get_attname(self):
+		return "%s_json" % self.name
 	
 	def contribute_to_class(self, cls, name):
-		if issubclass(cls, Entity):
-			self.name = name
-			signals.class_prepared.connect(self.actually_contribute_to_class, sender=cls)
-		else:
-			raise FieldError('AttributeFields can only be declared on Entity subclasses.')
-
-
-class RelationshipFieldDescriptor(object):
-	def __init__(self, field):
-		self.field = field
-	
-	def __get__(self, instance, owner):
-		if instance:
-			if self.field.key in instance._added_relationship_registry:
-				return instance._added_relationship_registry[self.field.key]
-			if self.field.key in instance._removed_relationship_registry:
-				return None
-			try:
-				return instance.relationships[self.field.key]
-			except KeyError:
-				return None
-		else:
-			raise AttributeError('The \'%s\' attribute can only be accessed from %s instances.' % (self.field.name, owner.__name__))
-	
-	def __set__(self, instance, value):
-		if isinstance(value, (models.Model, type(None))):
-			if self.field.key in instance._removed_relationship_registry:
-				instance._removed_relationship_registry.remove(self.field.key)
-			instance._added_relationship_registry[self.field.key] = value
-		else:
-			raise AttributeError('The \'%s\' attribute can only be set using existing Model objects.' % self.field.name)
-	
-	def __delete__(self, instance):
-		if self.field.key in instance._added_relationship_registry:
-			del instance._added_relationship_registry[self.field.key]
-		instance._removed_relationship_registry.append(self.field.key)
-
-
-class RelationshipField(object):
-	def __init__(self, key):
-		self.key = key
-	
-	def actually_contribute_to_class(self, sender, **kwargs):
-		setattr(sender, self.name, RelationshipFieldDescriptor(self))
-	
-	def contribute_to_class(self, cls, name):
-		if issubclass(cls, Entity):
-			self.name = name
-			signals.class_prepared.connect(self.actually_contribute_to_class, sender=cls)
-		else:
-			raise FieldError('RelationshipFields can only be declared on Entity subclasses.')
\ No newline at end of file
+		super(JSONField, self).contribute_to_class(cls, name)
+		setattr(cls, name, JSONDescriptor(self))
+		models.signals.pre_init.connect(self.fix_init_kwarg, sender=cls)
+	
+	def fix_init_kwarg(self, sender, args, kwargs, **signal_kwargs):
+		if self.name in kwargs:
+			kwargs[self.attname] = json.dumps(kwargs.pop(self.name))
+	
+	def formfield(self, *args, **kwargs):
+		kwargs["form_class"] = JSONFormField
+		return super(JSONField, self).formfield(*args, **kwargs)
+
+
+try:
+	from south.modelsinspector import add_introspection_rules
+except ImportError:
+	pass
+else:
+	add_introspection_rules([], ["^philo\.models\.fields\.TemplateField"])
+	add_introspection_rules([], ["^philo\.models\.fields\.JSONField"])
\ No newline at end of file