X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/f50cd63e40d7dfc9ffb51b679748b0003fddb019..785b59352880027f54ea0e81335d179eccee75f1:/models/fields/__init__.py

diff --git a/models/fields/__init__.py b/models/fields/__init__.py
index d8ed839..25af832 100644
--- 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