1 from django.core.exceptions import ValidationError, ObjectDoesNotExist
2 from django.forms.models import model_to_dict, fields_for_model, ModelFormMetaclass, ModelForm, BaseInlineFormSet
3 from django.template import loader, loader_tags, TemplateDoesNotExist, Context, Template as DjangoTemplate
4 from django.utils.datastructures import SortedDict
5 from philo.models import Entity, Template
6 from philo.models.fields import RelationshipField
7 from philo.utils import fattr
10 __all__ = ('EntityForm', )
13 def proxy_fields_for_entity_model(entity_model, fields=None, exclude=None, widgets=None, formfield_callback=lambda f, **kwargs: f.formfield(**kwargs)):
16 opts = entity_model._entity_meta
17 for f in opts.proxy_fields:
18 if fields and not f.name in fields:
20 if exclude and f.name in exclude:
22 if widgets and f.name in widgets:
23 kwargs = {'widget': widgets[f.name]}
26 formfield = formfield_callback(f, **kwargs)
28 field_list.append((f.name, formfield))
30 ignored.append(f.name)
31 field_dict = SortedDict(field_list)
33 field_dict = SortedDict(
34 [(f, field_dict.get(f)) for f in fields
35 if ((not exclude) or (exclude and f not in exclude)) and (f not in ignored) and (f in field_dict)]
40 # BEGIN HACK - This will not be required after http://code.djangoproject.com/ticket/14082 has been resolved
42 class EntityFormBase(ModelForm):
45 _old_metaclass_new = ModelFormMetaclass.__new__
47 def _new_metaclass_new(cls, name, bases, attrs):
48 new_class = _old_metaclass_new(cls, name, bases, attrs)
49 if issubclass(new_class, EntityFormBase) and new_class._meta.model:
50 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
53 ModelFormMetaclass.__new__ = staticmethod(_new_metaclass_new)
58 class EntityForm(EntityFormBase): # Would inherit from ModelForm directly if it weren't for the above HACK
59 def __init__(self, *args, **kwargs):
60 initial = kwargs.pop('initial', None)
61 instance = kwargs.get('instance', None)
62 if instance is not None:
64 for f in instance._entity_meta.proxy_fields:
65 if self._meta.fields and not f.name in self._meta.fields:
67 if self._meta.exclude and f.name in self._meta.exclude:
69 new_initial[f.name] = f.value_from_object(instance)
72 if initial is not None:
73 new_initial.update(initial)
74 kwargs['initial'] = new_initial
75 super(EntityForm, self).__init__(*args, **kwargs)
77 @fattr(alters_data=True)
78 def save(self, commit=True):
79 cleaned_data = self.cleaned_data
80 instance = super(EntityForm, self).save(commit=False)
82 for f in instance._entity_meta.proxy_fields:
83 if self._meta.fields and f.name not in self._meta.fields:
85 setattr(instance, f.attname, cleaned_data[f.name])
94 def validate_template(template):
96 Makes sure that the template and all included or extended templates are valid.
98 for node in template.nodelist:
100 if isinstance(node, loader_tags.ExtendsNode):
101 extended_template = node.get_parent(Context())
102 validate_template(extended_template)
103 elif isinstance(node, loader_tags.IncludeNode):
104 included_template = loader.get_template(node.template_name.resolve(Context()))
105 validate_template(extended_template)
107 raise ValidationError("Template code invalid. Error was: %s: %s" % (e.__class__.__name__, e))
110 class TemplateForm(ModelForm):
111 def clean_code(self):
112 code = self.cleaned_data['code']
114 t = DjangoTemplate(code)
116 raise ValidationError("Template code invalid. Error was: %s: %s" % (e.__class__.__name__, e))
125 class ContainerInlineFormSet(BaseInlineFormSet):
126 def __init__(self, containers, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None):
127 # Unfortunately, I need to add some things to BaseInline between its __init__ and its super call, so
128 # a lot of this is repetition.
130 # Start cribbed from BaseInline
131 from django.db.models.fields.related import RelatedObject
132 self.save_as_new = save_as_new
133 # is there a better way to get the object descriptor?
134 self.rel_name = RelatedObject(self.fk.rel.to, self.model, self.fk).get_accessor_name()
135 if self.fk.rel.field_name == self.fk.rel.to._meta.pk.name:
136 backlink_value = self.instance
138 backlink_value = getattr(self.instance, self.fk.rel.field_name)
140 queryset = self.model._default_manager
141 qs = queryset.filter(**{self.fk.name: backlink_value}).filter(name__in=containers)
142 # End cribbed from BaseInline
144 self.container_instances = []
146 self.container_instances.append(container)
147 containers.remove(container.name)
148 self.extra_containers = containers
149 self.extra = len(self.extra_containers)
151 super(BaseInlineFormSet, self).__init__(data, files, prefix, qs)
153 def _construct_form(self, i, **kwargs):
154 if i > self.initial_form_count(): # and not kwargs.get('instance'):
155 kwargs['instance'] = self.model(name=self.extra_containers[i - self.initial_form_count() - 1])
157 return super(ContainerInlineFormSet, self)._construct_form(i, **kwargs)
160 class ContentletInlineFormSet(ContainerInlineFormSet):
161 def __init__(self, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None):
163 self.instance = self.fk.rel.to()
166 self.instance = instance
167 containers = list(self.instance.containers[0])
169 super(ContentletInlineFormSet, self).__init__(containers, data, files, instance, save_as_new, prefix, queryset)
172 class ContentReferenceInlineFormSet(ContainerInlineFormSet):
173 def __init__(self, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None):
175 self.instance = self.fk.rel.to()
178 self.instance = instance
179 containers = list(self.instance.containers[1])
181 super(ContentReferenceInlineFormSet, self).__init__(containers, data, files, instance, save_as_new, prefix, queryset)