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Corrected SlugMultipleChoiceField introspection rule.
[philo.git] / models / fields.py
diff --git a/models/fields.py b/models/fields.py
index 0c68858..9e78273 100644 (file)
--- a/models/fields.py
+++ b/models/fields.py
@@ -1,165 +1,20 @@
-from django.db import models
 from django import forms
 from django import forms
-from django.core.exceptions import FieldError, ValidationError
+from django.core.exceptions import ValidationError
+from django.core.validators import validate_slug
+from django.db import models
 from django.utils import simplejson as json
 from django.utils.text import capfirst
 from django.utils import simplejson as json
 from django.utils.text import capfirst
-from philo.signals import entity_class_prepared
+from django.utils.translation import ugettext_lazy as _
+from philo.forms.fields import JSONFormField
 from philo.validators import TemplateValidator, json_validator
 
 
 from philo.validators import TemplateValidator, json_validator
 
 
-__all__ = ('JSONAttribute', 'ForeignKeyAttribute', 'ManyToManyAttribute')
-
-
-class EntityProxyField(object):
-       descriptor_class = None
-       
-       def __init__(self, *args, **kwargs):
-               if self.descriptor_class is None:
-                       raise NotImplementedError('EntityProxyField subclasses must specify a descriptor_class.')
-               self.verbose_name = kwargs.get('verbose_name', None)
-               self.help_text = kwargs.get('help_text', None)
-       
-       def actually_contribute_to_class(self, sender, **kwargs):
-               sender._entity_meta.add_proxy_field(self)
-               setattr(sender, self.attname, self.descriptor_class(self))
-       
-       def contribute_to_class(self, cls, name):
-               from philo.models.base import Entity
-               if issubclass(cls, Entity):
-                       self.name = name
-                       self.attname = name
-                       if self.verbose_name is None and name:
-                               self.verbose_name = name.replace('_', ' ')
-                       entity_class_prepared.connect(self.actually_contribute_to_class, sender=cls)
-               else:
-                       raise FieldError('%s instances can only be declared on Entity subclasses.' % self.__class__.__name__)
-       
-       def formfield(self, *args, **kwargs):
-               raise NotImplementedError('EntityProxyField subclasses must implement a formfield method.')
-       
-       def value_from_object(self, obj):
-               return getattr(obj, self.attname)
-
-
-class AttributeFieldDescriptor(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__))
-       
-       def __set__(self, instance, value):
-               raise NotImplementedError('AttributeFieldDescriptor subclasses must implement a __set__ method.')
-       
-       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)
-
-
-class JSONAttributeDescriptor(AttributeFieldDescriptor):
-       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
-
-
-class ForeignKeyAttributeDescriptor(AttributeFieldDescriptor):
-       def __set__(self, instance, value):
-               if isinstance(value, (models.Model, type(None))):
-                       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
-               else:
-                       raise AttributeError('The \'%s\' attribute can only be set using existing Model objects.' % self.field.name)
-
-
-class ManyToManyAttributeDescriptor(AttributeFieldDescriptor):
-       def __set__(self, instance, value):
-               if isinstance(value, models.QuerySet):
-                       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
-               else:
-                       raise AttributeError('The \'%s\' attribute can only be set to a QuerySet.' % self.field.name)
-
-
-class AttributeField(EntityProxyField):
-       def contribute_to_class(self, cls, name):
-               super(AttributeField, self).contribute_to_class(cls, name)
-               if self.key is None:
-                       self.key = name
-
-
-class JSONAttribute(AttributeField):
-       descriptor_class = JSONAttributeDescriptor
-       
-       def __init__(self, field_template=None, key=None, **kwargs):
-               super(AttributeField, self).__init__(**kwargs)
-               self.key = key
-               if field_template is None:
-                       field_template = models.CharField(max_length=255)
-               self.field_template = field_template
-       
-       def formfield(self, **kwargs):
-               defaults = {'required': False, 'label': capfirst(self.verbose_name), 'help_text': self.help_text}
-               defaults.update(kwargs)
-               return self.field_template.formfield(**defaults)
-       
-       def value_from_object(self, obj):
-               return getattr(obj, self.attname).value
-
-
-class ForeignKeyAttribute(AttributeField):
-       descriptor_class = ForeignKeyAttributeDescriptor
-       
-       def __init__(self, model, limit_choices_to=None, key=None, **kwargs):
-               super(ForeignKeyAttribute, self).__init__(**kwargs)
-               self.key = key
-               self.model = model
-               if limit_choices_to is None:
-                       limit_choices_to = {}
-               self.limit_choices_to = limit_choices_to
-       
-       def formfield(self, form_class=forms.ModelChoiceField, **kwargs):
-               defaults = {'required': False, 'label': capfirst(self.verbose_name), 'help_text': self.help_text}
-               defaults.update(kwargs)
-               return form_class(self.model._default_manager.complex_filter(self.limit_choices_to), **defaults)
-       
-       def value_from_object(self, obj):
-               relobj = super(ForeignKeyAttribute, self).value_from_object(obj).value
-               return getattr(relobj, 'pk', None)
-
-
-class ManyToManyAttribute(AttributeField):
-       descriptor_class = ManyToManyAttributeDescriptor
-       #FIXME: Add __init__ and formfield methods
-
-
 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 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 JSONFormField(forms.Field):
-       def clean(self, value):
-               try:
-                       return json.loads(value)
-               except Exception, e:
-                       raise ValidationError(u'JSON decode error: %s' % e)
-
-
 class JSONDescriptor(object):
        def __init__(self, field):
                self.field = field
 class JSONDescriptor(object):
        def __init__(self, field):
                self.field = field
@@ -184,9 +39,7 @@ class JSONDescriptor(object):
 
 
 class JSONField(models.TextField):
 
 
 class JSONField(models.TextField):
-       def __init__(self, *args, **kwargs):
-               super(JSONField, self).__init__(*args, **kwargs)
-               self.validators.append(json_validator)
+       default_validators = [json_validator]
        
        def get_attname(self):
                return "%s_json" % self.name
        
        def get_attname(self):
                return "%s_json" % self.name
@@ -194,16 +47,80 @@ class JSONField(models.TextField):
        def contribute_to_class(self, cls, name):
                super(JSONField, self).contribute_to_class(cls, name)
                setattr(cls, name, JSONDescriptor(self))
        def contribute_to_class(self, cls, name):
                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)
 
 
        
        def formfield(self, *args, **kwargs):
                kwargs["form_class"] = JSONFormField
                return super(JSONField, self).formfield(*args, **kwargs)
 
 
+class SlugMultipleChoiceField(models.Field):
+       __metaclass__ = models.SubfieldBase
+       description = _("Comma-separated slug field")
+       
+       def get_internal_type(self):
+               return "TextField"
+       
+       def to_python(self, value):
+               if not value:
+                       return []
+               
+               if isinstance(value, list):
+                       return value
+               
+               return value.split(',')
+       
+       def get_prep_value(self, value):
+               return ','.join(value)
+       
+       def formfield(self, **kwargs):
+               # This is necessary because django hard-codes TypedChoiceField for things with choices.
+               defaults = {
+                       'widget': forms.CheckboxSelectMultiple,
+                       'choices': self.get_choices(include_blank=False),
+                       'label': capfirst(self.verbose_name),
+                       'required': not self.blank,
+                       'help_text': self.help_text
+               }
+               if self.has_default():
+                       if callable(self.default):
+                               defaults['initial'] = self.default
+                               defaults['show_hidden_initial'] = True
+                       else:
+                               defaults['initial'] = self.get_default()
+               
+               for k in kwargs.keys():
+                       if k not in ('coerce', 'empty_value', 'choices', 'required',
+                                                'widget', 'label', 'initial', 'help_text',
+                                                'error_messages', 'show_hidden_initial'):
+                               del kwargs[k]
+               
+               defaults.update(kwargs)
+               form_class = forms.TypedMultipleChoiceField
+               return form_class(**defaults)
+       
+       def validate(self, value, model_instance):
+               invalid_values = []
+               for val in value:
+                       try:
+                               validate_slug(val)
+                       except ValidationError:
+                               invalid_values.append(val)
+               
+               if invalid_values:
+                       # should really make a custom message.
+                       raise ValidationError(self.error_messages['invalid_choice'] % invalid_values)
+
+
 try:
        from south.modelsinspector import add_introspection_rules
 except ImportError:
        pass
 else:
 try:
        from south.modelsinspector import add_introspection_rules
 except ImportError:
        pass
 else:
+       add_introspection_rules([], ["^philo\.models\.fields\.SlugMultipleChoiceField"])
        add_introspection_rules([], ["^philo\.models\.fields\.TemplateField"])
        add_introspection_rules([], ["^philo\.models\.fields\.JSONField"])
\ No newline at end of file
        add_introspection_rules([], ["^philo\.models\.fields\.TemplateField"])
        add_introspection_rules([], ["^philo\.models\.fields\.JSONField"])
\ No newline at end of file
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