commit 8ecda951e8ded8fadf9e54dbeb1b7c444d88e3d2 Author: Honza Král Date: Sun Nov 11 21:32:22 2007 +0100 Support for edit_inline for generic relations http://code.djangoproject.com/ticket/4667 diff --git a/django/contrib/contenttypes/generic.py b/django/contrib/contenttypes/generic.py index b738a26..ba45d4d 100644 --- a/django/contrib/contenttypes/generic.py +++ b/django/contrib/contenttypes/generic.py @@ -260,3 +260,104 @@ class GenericRel(ManyToManyRel): self.multiple = True assert not (self.raw_id_admin and self.filter_interface), \ "Generic relations may not use both raw_id_admin and filter_interface" + +from django.newforms.models import BaseModelFormSet, formset_for_model, save_instance +from django.contrib.admin.options import InlineModelAdmin, flatten_fieldsets + +def get_foreign_key(model, ct_field_name, id_field_name): + opts = model._meta + # avoid circular import + from django.db.models import ForeignKey + from django.contrib.contenttypes.models import ContentType + opts = model._meta + + # if there is no field called `ct_field_name` let the exception propagate + ct = opts.get_field(ct_field_name) + if not isinstance(ct, ForeignKey) or ct.rel.to != ContentType: + raise Exception("fk_name '%s' is not a ForeignKey to ContentType" % (ct_field_name)) + + # if there is no field called `id_field_name` let the exception propagate + obj_id = opts.get_field(id_field_name) + + return ct, obj_id + +def inline_formset(model, ct_field_name, id_field_name, fields=None, extra=3, orderable=False, deletable=True, formfield_callback=lambda f: f.formfield(), formset=None): + """ + Returns an ``InlineFormset`` for the given kwargs. + + You must provide ``fk_name`` if ``model`` has more than one ``ForeignKey`` + to ``parent_model``. + """ + ct, obj_id = get_foreign_key(model, ct_field_name, id_field_name) + # let the formset handle object deletion by default + FormSet = formset_for_model(model, formset=formset or GenericInlineFormset, fields=fields, + formfield_callback=formfield_callback, + extra=extra, orderable=orderable, + deletable=deletable) + # HACK: remove the ForeignKey to the parent from every form + # This should be done a line above before we pass 'fields' to formset_for_model + # an 'omit' argument would be very handy here + try: + del FormSet.form_class.base_fields[ct.name] + del FormSet.form_class.base_fields[obj_id.name] + except KeyError: + pass + FormSet.ct = ct + FormSet.obj_id = obj_id + return FormSet + +class GenericInlineFormset(BaseModelFormSet): + """A formset for child objects related to a parent.""" + def __init__(self, instance=None, data=None, files=None): + self.instance = instance + # is there a better way to get the object descriptor? + self.rel_name = self.ct.name + '_' + self.obj_id.name + super(GenericInlineFormset, self).__init__(data, files, prefix=self.rel_name) + + def get_queryset(self): + # This import is done here to avoid circular import importing this module + from django.contrib.contenttypes.models import ContentType + if self.instance is None: + return [] + return self.model._default_manager.filter( **{ + self.ct.name : ContentType.objects.get_for_model(self.instance), + self.obj_id.name : self.instance._get_pk_val() + }) + + def save_new(self, form, commit=True): + # This import is done here to avoid circular import importing this module + from django.contrib.contenttypes.models import ContentType + kwargs = { + self.ct.get_attname(): ContentType.objects.get_for_model(self.instance).id, + self.obj_id.get_attname(): self.instance._get_pk_val(), + } + new_obj = self.model(**kwargs) + return save_instance(form, new_obj, commit=commit) + +class GenericInlineModelAdmin(InlineModelAdmin): + ct_field_name = None + id_field_name = None + def formset_add(self, request): + """Returns an GenericInlineFormSet class for use in admin add views.""" + if self.declared_fieldsets: + fields = flatten_fieldsets(self.declared_fieldsets) + else: + fields = None + return inline_formset(self.model, self.ct_field_name, self.id_field_name, fields=fields, + formfield_callback=self.formfield_for_dbfield, extra=self.extra, formset=self.formset) + + def formset_change(self, request, obj): + """Returns an GenericInlineFormSet class for use in admin change views.""" + if self.declared_fieldsets: + fields = flatten_fieldsets(self.declared_fieldsets) + else: + fields = None + return inline_formset(self.model, self.ct_field_name, self.id_field_name, fields=fields, + formfield_callback=self.formfield_for_dbfield, extra=self.extra, formset=self.formset) + +class GenericStackedInline(GenericInlineModelAdmin): + template = 'admin/edit_inline/stacked.html' + +class GenericTabularInline(GenericInlineModelAdmin): + template = 'admin/edit_inline/tabular.html' + diff --git a/django/db/models/query.py b/django/db/models/query.py index 4d0d295..636ae72 100644 --- a/django/db/models/query.py +++ b/django/db/models/query.py @@ -5,7 +5,6 @@ from django.db.models import signals, loading from django.dispatch import dispatcher from django.utils.datastructures import SortedDict from django.utils.encoding import smart_unicode -from django.contrib.contenttypes import generic import datetime import operator import re @@ -1119,6 +1118,7 @@ def lookup_inner(path, lookup_type, value, opts, table, column): def delete_objects(seen_objs): "Iterate through a list of seen classes, and remove any instances that are referred to" + from django.contrib.contenttypes import generic qn = connection.ops.quote_name ordered_classes = seen_objs.keys() ordered_classes.reverse()