X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/3c9e34c075474c6bff157de0d3a38796ba44b02f..f314a8ddceb543e2bb4711d50bdd2060452689b1:/admin/base.py?ds=sidebyside diff --git a/admin/base.py b/admin/base.py index cb814b7..8151461 100644 --- a/admin/base.py +++ b/admin/base.py @@ -1,8 +1,15 @@ from django.conf import settings from django.contrib import admin from django.contrib.contenttypes import generic +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',) @@ -24,14 +31,151 @@ 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): list_display = ('name', 'slug') prepopulated_fields = {"slug": ("name",)} search_fields = ["name"] + + def response_add(self, request, obj, post_url_continue='../%s/'): + # If it's an ajax request, return a json response containing the necessary information. + if request.is_ajax(): + return HttpResponse(json.dumps({'pk': escape(obj._get_pk_val()), 'unicode': escape(obj)})) + return super(TagAdmin, self).response_add(request, obj, post_url_continue) + + +class AddTagAdmin(admin.ModelAdmin): + def formfield_for_manytomany(self, db_field, request=None, **kwargs): + """ + Get a form Field for a ManyToManyField. + """ + # If it uses an intermediary model that isn't auto created, don't show + # a field in admin. + if not db_field.rel.through._meta.auto_created: + return None + + if db_field.rel.to == Tag and db_field.name in (list(self.filter_vertical) + list(self.filter_horizontal)): + opts = Tag._meta + if request.user.has_perm(opts.app_label + '.' + opts.get_add_permission()): + kwargs['widget'] = TagFilteredSelectMultiple(db_field.verbose_name, (db_field.name in self.filter_vertical)) + return db_field.formfield(**kwargs) + + return super(AddTagAdmin, self).formfield_for_manytomany(db_field, request, **kwargs) + admin.site.register(Tag, TagAdmin) \ No newline at end of file