Ticket #3186: django_newforms_from_db_helper2.patch

django/newforms/models.py

@@ -5 +5 @@
 
 from forms import BaseForm, DeclarativeFieldsMetaclass, SortedDictFromList
 
-__all__ = ('form_for_model', 'form_for_fields')
+__all__ = ('form_for_model', 'form_for_fields', 'form_with_db_data')
 
 def create(self, save=True):
     "Creates and returns model instance according to self.clean_data."
@@ -36 +36 @@
     "Returns a Form class for the given list of Django database field instances."
     fields = SortedDictFromList([(f.name, f.formfield()) for f in field_list])
     return type('FormForFields', (BaseForm,), {'fields': fields})
+
+def form_with_db_data(obj, form, **kwargs):
+    """Return an instance of the given Form class whose fields are
+    pre-filled with data from the given SQL object."""
+
+    data = {}
+    for field in form.fields.keys():
+        data[field] = getattr(obj, field, None)
+    f = form(data=data, **kwargs)
+    # Force the form to ignore errors, as we want this prefilled form
+    # returned to the user, not immediately rolled back into the
+    # database.
+    f.ignore_errors = True
+    return f