newforms: Changed form_for_model() to ignore a field if its formfield() returns None, and changed AutoField.formfield() to return None

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4214 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/fields/__init__.py

@@ -375,6 +375,9 @@ class AutoField(Field):
         super(AutoField, self).contribute_to_class(cls, name)
         cls._meta.has_auto_field = True
 
+    def formfield(self):
+        return None
+
 class BooleanField(Field):
     def __init__(self, *args, **kwargs):
         kwargs['blank'] = True

django/newforms/models.py

@@ -10,7 +10,12 @@ __all__ = ('form_for_model', 'form_for_fields')
 def form_for_model(model):
     "Returns a Form class for the given Django model class."
     opts = model._meta
-    fields = SortedDictFromList([(f.name, f.formfield()) for f in opts.fields + opts.many_to_many])
+    field_list = []
+    for f in opts.fields + opts.many_to_many:
+        formfield = f.formfield()
+        if formfield:
+            field_list.append((f.name, formfield))
+    fields = SortedDictFromList(field_list)
     return type(opts.object_name + 'Form', (BaseForm,), {'fields': fields, '_model_opts': opts})
 
 def form_for_fields(field_list):

tests/modeltests/model_forms/models.py

@@ -26,11 +26,9 @@ __test__ = {'API_TESTS': """
 >>> CategoryForm = form_for_model(Category)
 >>> f = CategoryForm()
 >>> print f
-<tr><th><label for="id_id">ID:</label></th><td><input type="text" name="id" id="id_id" /></td></tr>
 <tr><th><label for="id_name">Name:</label></th><td><input id="id_name" type="text" name="name" maxlength="20" /></td></tr>
 <tr><th><label for="id_url">The URL:</label></th><td><input id="id_url" type="text" name="url" maxlength="40" /></td></tr>
 >>> print f.as_ul()
-<li><label for="id_id">ID:</label> <input type="text" name="id" id="id_id" /></li>
 <li><label for="id_name">Name:</label> <input id="id_name" type="text" name="name" maxlength="20" /></li>
 <li><label for="id_url">The URL:</label> <input id="id_url" type="text" name="url" maxlength="40" /></li>
 >>> print f['name']
@@ -38,7 +36,12 @@ __test__ = {'API_TESTS': """
 
 >>> f = CategoryForm(auto_id=False)
 >>> print f.as_ul()
-<li>ID: <input type="text" name="id" /></li>
 <li>Name: <input type="text" name="name" maxlength="20" /></li>
 <li>The URL: <input type="text" name="url" maxlength="40" /></li>
+
+>>> f = CategoryForm({'name': 'Entertainment', 'url': 'entertainment'})
+>>> f.errors
+{}
+>>> f.clean_data
+{'url': u'entertainment', 'name': u'Entertainment'}
 """}