Add preliminairy working JavaScript to render polymorphic inlines

polymorphic/admin/helpers.py

@@ -3,8 +3,13 @@ Rendering utils for admin forms;
 
 This makes sure that admin fieldsets/layout settings are exported to the template.
 """
+import json
+
 import django
 from django.contrib.admin.helpers import InlineAdminFormSet, InlineAdminForm, AdminField
+from django.utils.encoding import force_text
+from django.utils.text import capfirst
+from django.utils.translation import ugettext
 
 from polymorphic.formsets import BasePolymorphicModelFormSet
 
@@ -14,6 +19,9 @@ class PolymorphicInlineAdminForm(InlineAdminForm):
     Expose the admin configuration for a form
     """
 
+    def polymorphic_ctype_field(self):
+        return AdminField(self.form, 'polymorphic_ctype', False)
+
 
 class PolymorphicInlineAdminFormSet(InlineAdminFormSet):
     """
@@ -71,6 +79,30 @@ class PolymorphicInlineAdminFormSet(InlineAdminFormSet):
         fields.update(child_inline.get_prepopulated_fields(self.request, self.obj))
         return fields
 
+    # The polymorphic template follows the same method like all other inlines do in Django 1.10.
+    # This method is added for compatibility with older Django versions.
+    def inline_formset_data(self):
+        """
+        A JavaScript data structure for the JavaScript code
+        """
+        verbose_name = self.opts.verbose_name
+        return json.dumps({
+            'name': '#%s' % self.formset.prefix,
+            'options': {
+                'prefix': self.formset.prefix,
+                'addText': ugettext('Add another %(verbose_name)s') % {
+                    'verbose_name': capfirst(verbose_name),
+                },
+                'childTypes': [
+                    {
+                        'type': model._meta.model_name,
+                        'name': force_text(model._meta.verbose_name)
+                    } for model in self.formset.child_forms.keys()
+                ],
+                'deleteText': ugettext('Remove'),
+            }
+        })
+
 
 class PolymorphicInlineSupportMixin(object):
     """

polymorphic/admin/inlines.py

@@ -22,8 +22,22 @@ class PolymorphicInlineModelAdmin(InlineModelAdmin):
     * Permissions are only checked on the base model.
     * The child inlines can't override the base model fields, only this parent inline can do that.
     """
+
     formset = BasePolymorphicInlineFormSet
 
+    #: The extra media to add for the polymorphic inlines effect.
+    #: This can be redefined for subclasses.
+    polymorphic_media = Media(
+        js=(
+            'polymorphic/js/jquery.django-inlines.js',
+        ),
+        css={
+            'all': (
+                'polymorphic/css/polymorphic_inlines.css',
+            )
+        }
+    )
+
     #: The extra forms to show
     #: By default there are no 'extra' forms as the desired type is unknown.
     #: Instead, add each new item using JavaScript that first offers a type-selection.