Initial commit of Gilbert, an advanced Django administration interface.

[philo.git] / forms.py

diff --git a/forms.py b/forms.py
index 506ab71..57e772d 100644 (file)
--- a/forms.py
+++ b/forms.py
@@ -1,8 +1,11 @@
+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.admin.widgets import ModelLookupWidget
 from philo.models import Entity, Template, Contentlet, ContentReference
 from philo.models.fields import RelationshipField
 from philo.utils import fattr
@@ -130,12 +133,28 @@ class ContainerForm(ModelForm):
 
 
 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']
@@ -173,16 +192,61 @@ class ContainerInlineFormSet(BaseInlineFormSet):
                        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)
        
@@ -205,10 +269,13 @@ 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)