X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/6b8ae453480c263fa000768c6bf44d557e728b60..5a45551fd535081084355dba85642ada72b71750:/forms.py?ds=sidebyside diff --git a/forms.py b/forms.py index fd629c0..48e1d7f 100644 --- a/forms.py +++ b/forms.py @@ -1,10 +1,15 @@ +from django import forms +from django.contrib.admin.widgets import AdminTextareaWidget +from django.contrib.contenttypes.generic import BaseGenericInlineFormSet +from django.contrib.contenttypes.models import ContentType from django.core.exceptions import ValidationError, ObjectDoesNotExist +from django.db.models import Q from django.forms.models import model_to_dict, fields_for_model, ModelFormMetaclass, ModelForm, BaseInlineFormSet from django.forms.formsets import TOTAL_FORM_COUNT from django.template import loader, loader_tags, TemplateDoesNotExist, Context, Template as DjangoTemplate from django.utils.datastructures import SortedDict -from philo.models import Entity, Template, Contentlet, ContentReference -from philo.models.fields import RelationshipField +from philo.admin.widgets import ModelLookupWidget +from philo.models import Entity, Template, Contentlet, ContentReference, Attribute from philo.utils import fattr @@ -92,35 +97,67 @@ class EntityForm(EntityFormBase): # Would inherit from ModelForm directly if it return instance -def validate_template(template): - """ - Makes sure that the template and all included or extended templates are valid. - """ - for node in template.nodelist: - try: - if isinstance(node, loader_tags.ExtendsNode): - extended_template = node.get_parent(Context()) - validate_template(extended_template) - elif isinstance(node, loader_tags.IncludeNode): - included_template = loader.get_template(node.template_name.resolve(Context())) - validate_template(extended_template) - except Exception, e: - raise ValidationError("Template code invalid. Error was: %s: %s" % (e.__class__.__name__, e)) - - -class TemplateForm(ModelForm): - def clean_code(self): - code = self.cleaned_data['code'] - try: - t = DjangoTemplate(code) - except Exception, e: - raise ValidationError("Template code invalid. Error was: %s: %s" % (e.__class__.__name__, e)) +class AttributeForm(ModelForm): + 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. + self._cached_value_ct = self.instance.value_content_type + self._cached_value = self.instance.value + + if self.instance.value is not None: + value_field = self.instance.value.value_formfield() + if value_field: + self.fields['value'] = value_field + if hasattr(self.instance.value, 'content_type'): + self.fields['content_type'] = self.instance.value._meta.get_field('content_type').formfield(initial=getattr(self.instance.value.content_type, 'pk', None)) + + 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: + if self.instance.value is not None: + self._cached_value.delete() + if 'value' in self.cleaned_data: + del(self.cleaned_data['value']) + + if self.instance.value_content_type is not None: + # Make a blank value of the new type! Run special code for content_type attributes. + if hasattr(self.instance.value_content_type.model_class(), 'content_type'): + if self._cached_value and hasattr(self._cached_value, 'content_type'): + new_ct = self._cached_value.content_type + else: + new_ct = None + new_value = self.instance.value_content_type.model_class().objects.create(content_type=new_ct) + else: + new_value = self.instance.value_content_type.model_class().objects.create() + + new_value.apply_data(self.cleaned_data) + new_value.save() + self.instance.value = new_value + else: + # The value type is the same, but one of the fields has changed. + # Check to see if the changed value was the content type. We have to check the + # cleaned_data because self.instance.value.content_type was overridden. + if hasattr(self.instance.value, 'content_type') and 'content_type' in self.cleaned_data and 'value' in self.cleaned_data and (not hasattr(self._cached_value, 'content_type') or self._cached_value.content_type != self.cleaned_data['content_type']): + self.cleaned_data['value'] = None + + self.instance.value.apply_data(self.cleaned_data) + self.instance.value.save() + + super(AttributeForm, self).save(*args, **kwargs) + return self.instance + + class Meta: + model = Attribute - validate_template(t) - return code - class Meta: - model = Template +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() class ContainerForm(ModelForm): @@ -130,12 +167,28 @@ class ContainerForm(ModelForm): class ContentletForm(ContainerForm): + content = forms.CharField(required=False, widget=AdminTextareaWidget, label='Content') + + def should_delete(self): + return not bool(self.cleaned_data['content']) + class Meta: model = Contentlet - fields = ['name', 'content', 'dynamic'] + fields = ['name', 'content'] class ContentReferenceForm(ContainerForm): + def __init__(self, *args, **kwargs): + super(ContentReferenceForm, self).__init__(*args, **kwargs) + try: + self.fields['content_id'].widget = ModelLookupWidget(self.instance.content_type) + except ObjectDoesNotExist: + # This will happen when an empty form (which we will never use) gets instantiated. + pass + + def should_delete(self): + return (self.cleaned_data['content_id'] is None) + class Meta: model = ContentReference fields = ['name', 'content_id'] @@ -143,8 +196,8 @@ class ContentReferenceForm(ContainerForm): class ContainerInlineFormSet(BaseInlineFormSet): def __init__(self, containers, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None): - # Unfortunately, I need to add some things to BaseInline between its __init__ and its super call, so - # a lot of this is repetition. + # Unfortunately, I need to add some things to BaseInline between its __init__ and its + # super call, so a lot of this is repetition. # Start cribbed from BaseInline from django.db.models.fields.related import RelatedObject @@ -157,35 +210,88 @@ class ContainerInlineFormSet(BaseInlineFormSet): backlink_value = getattr(self.instance, self.fk.rel.field_name) if queryset is None: queryset = self.model._default_manager - qs = queryset.filter(**{self.fk.name: backlink_value}).filter(name__in=containers) + qs = queryset.filter(**{self.fk.name: backlink_value}) # End cribbed from BaseInline - self.container_instances = [] - for container in qs: - self.container_instances.append(container) - containers.remove(container.name) + self.container_instances, qs = self.get_container_instances(containers, qs) self.extra_containers = containers self.extra = len(self.extra_containers) super(BaseInlineFormSet, self).__init__(data, files, prefix=prefix, queryset=qs) + def get_container_instances(self, containers, qs): + raise NotImplementedError + def total_form_count(self): if self.data or self.files: return self.management_form.cleaned_data[TOTAL_FORM_COUNT] else: return self.initial_form_count() + self.extra + + def save_existing_objects(self, commit=True): + self.changed_objects = [] + self.deleted_objects = [] + if not self.get_queryset(): + return [] + + saved_instances = [] + for form in self.initial_forms: + pk_name = self._pk_field.name + raw_pk_value = form._raw_value(pk_name) + + # clean() for different types of PK fields can sometimes return + # the model instance, and sometimes the PK. Handle either. + pk_value = form.fields[pk_name].clean(raw_pk_value) + pk_value = getattr(pk_value, 'pk', pk_value) + + obj = self._existing_object(pk_value) + if form.should_delete(): + self.deleted_objects.append(obj) + obj.delete() + continue + if form.has_changed(): + self.changed_objects.append((obj, form.changed_data)) + saved_instances.append(self.save_existing(form, obj, commit=commit)) + if not commit: + self.saved_forms.append(form) + return saved_instances + + def save_new_objects(self, commit=True): + self.new_objects = [] + for form in self.extra_forms: + if not form.has_changed(): + continue + # If someone has marked an add form for deletion, don't save the + # object. + if form.should_delete(): + continue + self.new_objects.append(self.save_new(form, commit=commit)) + if not commit: + self.saved_forms.append(form) + return self.new_objects class ContentletInlineFormSet(ContainerInlineFormSet): def __init__(self, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None): if instance is None: self.instance = self.fk.rel.to() - containers = [] else: self.instance = instance + + try: containers = list(self.instance.containers[0]) + except ObjectDoesNotExist: + containers = [] super(ContentletInlineFormSet, self).__init__(containers, data, files, instance, save_as_new, prefix, queryset) + def get_container_instances(self, containers, qs): + qs = qs.filter(name__in=containers) + container_instances = [] + for container in qs: + container_instances.append(container) + containers.remove(container.name) + return container_instances, qs + def _construct_form(self, i, **kwargs): if i >= self.initial_form_count(): # and not kwargs.get('instance'): kwargs['instance'] = self.model(name=self.extra_containers[i - self.initial_form_count() - 1]) @@ -197,12 +303,28 @@ class ContentReferenceInlineFormSet(ContainerInlineFormSet): def __init__(self, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None): if instance is None: self.instance = self.fk.rel.to() - containers = [] else: self.instance = instance + + try: containers = list(self.instance.containers[1]) + except ObjectDoesNotExist: + containers = [] super(ContentReferenceInlineFormSet, self).__init__(containers, data, files, instance, save_as_new, prefix, queryset) + + def get_container_instances(self, containers, qs): + filter = Q() + + for name, ct in containers: + filter |= Q(name=name, content_type=ct) + + qs = qs.filter(filter) + container_instances = [] + for container in qs: + container_instances.append(container) + containers.remove((container.name, container.content_type)) + return container_instances, qs def _construct_form(self, i, **kwargs): if i >= self.initial_form_count(): # and not kwargs.get('instance'):