+++ /dev/null
-from django import forms
-from django.contrib.contenttypes.generic import BaseGenericInlineFormSet
-from django.contrib.contenttypes.models import ContentType
-from django.forms.models import ModelFormMetaclass, ModelForm
-from django.utils.datastructures import SortedDict
-from philo.models import Attribute
-from philo.utils import fattr
-
-
-__all__ = ('EntityForm', 'AttributeForm', 'AttributeInlineFormSet')
-
-
-def proxy_fields_for_entity_model(entity_model, fields=None, exclude=None, widgets=None, formfield_callback=lambda f, **kwargs: f.formfield(**kwargs)):
- field_list = []
- ignored = []
- opts = entity_model._entity_meta
- for f in opts.proxy_fields:
- if not f.editable:
- continue
- if fields and not f.name in fields:
- continue
- if exclude and f.name in exclude:
- continue
- if widgets and f.name in widgets:
- kwargs = {'widget': widgets[f.name]}
- else:
- kwargs = {}
- formfield = formfield_callback(f, **kwargs)
- if formfield:
- field_list.append((f.name, formfield))
- else:
- ignored.append(f.name)
- field_dict = SortedDict(field_list)
- if fields:
- field_dict = SortedDict(
- [(f, field_dict.get(f)) for f in fields
- if ((not exclude) or (exclude and f not in exclude)) and (f not in ignored) and (f in field_dict)]
- )
- return field_dict
-
-
-# BEGIN HACK - This will not be required after http://code.djangoproject.com/ticket/14082 has been resolved
-
-class EntityFormBase(ModelForm):
- pass
-
-_old_metaclass_new = ModelFormMetaclass.__new__
-
-def _new_metaclass_new(cls, name, bases, attrs):
- new_class = _old_metaclass_new(cls, name, bases, attrs)
- if issubclass(new_class, EntityFormBase) and new_class._meta.model:
- new_class.base_fields.update(proxy_fields_for_entity_model(new_class._meta.model, new_class._meta.fields, new_class._meta.exclude, new_class._meta.widgets)) # don't pass in formfield_callback
- return new_class
-
-ModelFormMetaclass.__new__ = staticmethod(_new_metaclass_new)
-
-# END HACK
-
-
-class EntityForm(EntityFormBase): # Would inherit from ModelForm directly if it weren't for the above HACK
- def __init__(self, *args, **kwargs):
- initial = kwargs.pop('initial', None)
- instance = kwargs.get('instance', None)
- if instance is not None:
- new_initial = {}
- for f in instance._entity_meta.proxy_fields:
- if self._meta.fields and not f.name in self._meta.fields:
- continue
- if self._meta.exclude and f.name in self._meta.exclude:
- continue
- new_initial[f.name] = f.value_from_object(instance)
- else:
- new_initial = {}
- if initial is not None:
- new_initial.update(initial)
- kwargs['initial'] = new_initial
- super(EntityForm, self).__init__(*args, **kwargs)
-
- @fattr(alters_data=True)
- def save(self, commit=True):
- cleaned_data = self.cleaned_data
- instance = super(EntityForm, self).save(commit=False)
-
- for f in instance._entity_meta.proxy_fields:
- if not f.editable or not f.name in cleaned_data:
- continue
- if self._meta.fields and f.name not in self._meta.fields:
- continue
- if self._meta.exclude and f.name in self._meta.exclude:
- continue
- setattr(instance, f.attname, cleaned_data[f.name])
-
- if commit:
- instance.save()
- self.save_m2m()
-
- return instance
-
-
- def apply_data(self, cleaned_data):
- self.value = cleaned_data.get('value', None)
-
- def apply_data(self, cleaned_data):
- if 'value' in cleaned_data and cleaned_data['value'] is not None:
- self.value = cleaned_data['value']
- else:
- self.content_type = cleaned_data.get('content_type', None)
- # If there is no value set in the cleaned data, clear the stored value.
- self.object_id = None
-
- def apply_data(self, cleaned_data):
- if 'value' in cleaned_data and cleaned_data['value'] is not None:
- self.value = cleaned_data['value']
- else:
- self.content_type = cleaned_data.get('content_type', None)
- # If there is no value set in the cleaned data, clear the stored value.
- self.value = []
-
-class AttributeForm(ModelForm):
- """
- This class handles an attribute's fields as well as the fields for its value (if there is one.)
- The fields defined will vary depending on the value type, but the fields for defining the value
- (i.e. value_content_type and value_object_id) will always be defined. Except that value_object_id
- will never be defined. BLARGH!
- """
- def __init__(self, *args, **kwargs):
- super(AttributeForm, self).__init__(*args, **kwargs)
-
- # This is necessary because model forms store changes to self.instance in their clean method.
- # Mutter mutter.
- value = self.instance.value
- self._cached_value_ct = self.instance.value_content_type
- self._cached_value = value
-
- # If there is a value, pull in its fields.
- if value is not None:
- self.value_fields = value.value_formfields()
- self.fields.update(self.value_fields)
-
- def save(self, *args, **kwargs):
- # At this point, the cleaned_data has already been stored on self.instance.
-
- if self.instance.value_content_type != self._cached_value_ct:
- # The value content type has changed. Clear the old value, if there was one.
- if self._cached_value:
- self._cached_value.delete()
-
- # Clear the submitted value, if any.
- self.cleaned_data.pop('value', None)
-
- # Now create a new value instance so that on next instantiation, the form will
- # know what fields to add.
- if self.instance.value_content_type is not None:
- self.instance.value = self.instance.value_content_type.model_class().objects.create()
- elif self.instance.value is not None:
- # The value content type is the same, but one of the value fields has changed.
-
- # Use construct_instance to apply the changes from the cleaned_data to the value instance.
- fields = self.value_fields.keys()
- if set(fields) & set(self.changed_data):
- self.instance.value.construct_instance(**dict([(key, self.cleaned_data[key]) for key in fields]))
- self.instance.value.save()
-
- return super(AttributeForm, self).save(*args, **kwargs)
-
- class Meta:
- model = Attribute
-
-
-class AttributeInlineFormSet(BaseGenericInlineFormSet):
- "Necessary to force the GenericInlineFormset to use the form's save method for new objects."
- def save_new(self, form, commit):
- setattr(form.instance, self.ct_field.get_attname(), ContentType.objects.get_for_model(self.instance).pk)
- setattr(form.instance, self.ct_fk_field.get_attname(), self.instance.pk)
- return form.save()
\ No newline at end of file
git.ithinksw.org / philo.git / blobdiff