X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/22ed154223d146c24e7335584a1f83357601dc3a..ca9342a54be98582d23c0a4e179342efa1005bfc:/forms.py diff --git a/forms.py b/forms.py index 907e54d..57e772d 100644 --- a/forms.py +++ b/forms.py @@ -1,6 +1,12 @@ -from django.forms.models import model_to_dict, fields_for_model, ModelFormMetaclass, ModelForm +from django import forms +from django.contrib.admin.widgets import AdminTextareaWidget +from django.core.exceptions import ValidationError, ObjectDoesNotExist +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 +from philo.admin.widgets import ModelLookupWidget +from philo.models import Entity, Template, Contentlet, ContentReference from philo.models.fields import RelationshipField from philo.utils import fattr @@ -86,4 +92,204 @@ class EntityForm(EntityFormBase): # Would inherit from ModelForm directly if it instance.save() self.save_m2m() - return instance \ No newline at end of file + 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)) + + validate_template(t) + return code + + class Meta: + model = Template + + +class ContainerForm(ModelForm): + def __init__(self, *args, **kwargs): + super(ContainerForm, self).__init__(*args, **kwargs) + self.verbose_name = self.instance.name.replace('_', ' ') + + +class ContentletForm(ContainerForm): + content = forms.CharField(required=False, widget=AdminTextareaWidget) + + def should_delete(self): + return not bool(self.cleaned_data['content']) + + class Meta: + model = Contentlet + fields = ['name', 'content', 'dynamic'] + + +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'] + + +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. + + # Start cribbed from BaseInline + from django.db.models.fields.related import RelatedObject + self.save_as_new = save_as_new + # is there a better way to get the object descriptor? + self.rel_name = RelatedObject(self.fk.rel.to, self.model, self.fk).get_accessor_name() + if self.fk.rel.field_name == self.fk.rel.to._meta.pk.name: + backlink_value = self.instance + else: + 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}) + # End cribbed from BaseInline + + 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() + 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]) + + return super(ContentletInlineFormSet, self)._construct_form(i, **kwargs) + + +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() + 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): + qs = qs.filter(name__in=[c[0] for c in containers]) + 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'): + name, content_type = self.extra_containers[i - self.initial_form_count() - 1] + kwargs['instance'] = self.model(name=name, content_type=content_type) + + return super(ContentReferenceInlineFormSet, self)._construct_form(i, **kwargs) \ No newline at end of file