X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/d8ba4e197c35a8e30f10112fcf53740e0711dc98..152d5701adc571416ed8fc4739d19ed316a69221:/admin/base.py

diff --git a/admin/base.py b/admin/base.py
index 0413dde..8151461 100644
--- a/admin/base.py
+++ b/admin/base.py
@@ -5,8 +5,11 @@ from django.http import HttpResponse
 from django.utils import simplejson as json
 from django.utils.html import escape
 from philo.models import Tag, Attribute
-from philo.forms import AttributeForm, AttributeInlineFormSet
+from philo.models.fields.entities import ForeignKeyAttribute, ManyToManyAttribute
+from philo.admin.forms.attributes import AttributeForm, AttributeInlineFormSet
 from philo.admin.widgets import TagFilteredSelectMultiple
+from philo.forms.entities import EntityForm, proxy_fields_for_entity_model
+from mptt.admin import MPTTModelAdmin
 
 
 COLLAPSE_CLASSES = ('collapse', 'collapse-closed', 'closed',)
@@ -28,9 +31,120 @@ class AttributeInline(generic.GenericTabularInline):
 		template = 'admin/philo/edit_inline/tabular_attribute.html'
 
 
+def hide_proxy_fields(cls, attname, proxy_field_set):
+	val_set = set(getattr(cls, attname))
+	if proxy_field_set & val_set:
+		cls._hidden_attributes[attname] = list(val_set)
+		setattr(cls, attname, list(val_set - proxy_field_set))
+
+
+class EntityAdminMetaclass(admin.ModelAdmin.__metaclass__):
+	def __new__(cls, name, bases, attrs):
+		# HACK to bypass model validation for proxy fields by masking them as readonly fields
+		new_class = super(EntityAdminMetaclass, cls).__new__(cls, name, bases, attrs)
+		form = getattr(new_class, 'form', None)
+		if form:
+			opts = form._meta
+			if issubclass(form, EntityForm) and opts.model:
+				proxy_fields = proxy_fields_for_entity_model(opts.model).keys()
+				
+				# Store readonly fields iff they have been declared.
+				if 'readonly_fields' in attrs or not hasattr(new_class, '_real_readonly_fields'):
+					new_class._real_readonly_fields = new_class.readonly_fields
+				
+				readonly_fields = new_class.readonly_fields
+				new_class.readonly_fields = list(set(readonly_fields) | set(proxy_fields))
+				
+				# Additional HACKS to handle raw_id_fields and other attributes that the admin
+				# uses model._meta.get_field to validate.
+				new_class._hidden_attributes = {}
+				proxy_fields = set(proxy_fields)
+				hide_proxy_fields(new_class, 'raw_id_fields', proxy_fields)
+		#END HACK
+		return new_class
+
+
 class EntityAdmin(admin.ModelAdmin):
+	__metaclass__ = EntityAdminMetaclass
+	form = EntityForm
 	inlines = [AttributeInline]
 	save_on_top = True
+	
+	def __init__(self, *args, **kwargs):
+		# HACK PART 2 restores the actual readonly fields etc. on __init__.
+		if hasattr(self, '_real_readonly_fields'):
+			self.readonly_fields = self.__class__._real_readonly_fields
+		if hasattr(self, '_hidden_attributes'):
+			for name, value in self._hidden_attributes.items():
+				setattr(self, name, value)
+		# END HACK
+		super(EntityAdmin, self).__init__(*args, **kwargs)
+	
+	def formfield_for_dbfield(self, db_field, **kwargs):
+		"""
+		Override the default behavior to provide special formfields for EntityEntitys.
+		Essentially clones the ForeignKey/ManyToManyField special behavior for the Attribute versions.
+		"""
+		if not db_field.choices and isinstance(db_field, (ForeignKeyAttribute, ManyToManyAttribute)):
+			request = kwargs.pop("request", None)
+			# Combine the field kwargs with any options for formfield_overrides.
+			# Make sure the passed in **kwargs override anything in
+			# formfield_overrides because **kwargs is more specific, and should
+			# always win.
+			if db_field.__class__ in self.formfield_overrides:
+				kwargs = dict(self.formfield_overrides[db_field.__class__], **kwargs)
+			
+			# Get the correct formfield.
+			if isinstance(db_field, ManyToManyAttribute):
+				formfield = self.formfield_for_manytomanyattribute(db_field, request, **kwargs)
+			elif isinstance(db_field, ForeignKeyAttribute):
+				formfield = self.formfield_for_foreignkeyattribute(db_field, request, **kwargs)
+			
+			# For non-raw_id fields, wrap the widget with a wrapper that adds
+			# extra HTML -- the "add other" interface -- to the end of the
+			# rendered output. formfield can be None if it came from a
+			# OneToOneField with parent_link=True or a M2M intermediary.
+			# TODO: Implement this.
+			#if formfield and db_field.name not in self.raw_id_fields:
+			#	formfield.widget = admin.widgets.RelatedFieldWidgetWrapper(formfield.widget, db_field, self.admin_site)
+			
+			return formfield
+		return super(EntityAdmin, self).formfield_for_dbfield(db_field, **kwargs)
+	
+	def formfield_for_foreignkeyattribute(self, db_field, request=None, **kwargs):
+		"""Get a form field for a ForeignKeyAttribute field."""
+		db = kwargs.get('using')
+		if db_field.name in self.raw_id_fields:
+			kwargs['widget'] = admin.widgets.ForeignKeyRawIdWidget(db_field, db)
+		#TODO: Add support for radio fields
+		#elif db_field.name in self.radio_fields:
+		#	kwargs['widget'] = widgets.AdminRadioSelect(attrs={
+		#		'class': get_ul_class(self.radio_fields[db_field.name]),
+		#	})
+		#	kwargs['empty_label'] = db_field.blank and _('None') or None
+		
+		return db_field.formfield(**kwargs)
+	
+	def formfield_for_manytomanyattribute(self, db_field, request=None, **kwargs):
+		"""Get a form field for a ManyToManyAttribute field."""
+		db = kwargs.get('using')
+		
+		if db_field.name in self.raw_id_fields:
+			kwargs['widget'] = admin.widgets.ManyToManyRawIdWidget(db_field, using=db)
+			kwargs['help_text'] = ''
+		#TODO: Add support for filtered fields.
+		#elif db_field.name in (list(self.filter_vertical) + list(self.filter_horizontal)):
+		#	kwargs['widget'] = widgets.FilteredSelectMultiple(db_field.verbose_name, (db_field.name in self.filter_vertical))
+		
+		return db_field.formfield(**kwargs)
+
+
+class TreeAdmin(MPTTModelAdmin):
+	pass
+
+
+class TreeEntityAdmin(EntityAdmin, TreeAdmin):
+	pass
 
 
 class TagAdmin(admin.ModelAdmin):