Merge branch 'julian' of git://github.com/lapilofu/philo

[philo.git] / models / fields / __init__.py

diff --git a/models/fields/__init__.py b/models/fields/__init__.py
index d8ed839..25af832 100644 (file)
--- a/models/fields/__init__.py
+++ b/models/fields/__init__.py
@@ -1,6 +1,10 @@
 from django import forms
+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.translation import ugettext_lazy as _
 from philo.forms.fields import JSONFormField
 from philo.validators import TemplateValidator, json_validator
 #from philo.models.fields.entities import *
@@ -55,10 +59,69 @@ class JSONField(models.TextField):
                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:
+       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