Ticket #17650: baseform_contains.diff

django/forms/forms.py

@@ -101 +101 @@
         for name in self.fields:
             yield self[name]
 
+    def __contains__(self, name):
+        return name in self.fields
+
     def __getitem__(self, name):
         "Returns a BoundField with the given name."
         try:

tests/regressiontests/forms/tests/forms.py

@@ -42 +42 @@
         self.assertHTMLEqual(str(p['first_name']), '<input type="text" name="first_name" value="John" id="id_first_name" />')
         self.assertHTMLEqual(str(p['last_name']), '<input type="text" name="last_name" value="Lennon" id="id_last_name" />')
         self.assertHTMLEqual(str(p['birthday']), '<input type="text" name="birthday" value="1940-10-9" id="id_birthday" />')
+        self.assertTrue('first_name' in p)
+        self.assertFalse('nonexistentfield' in p)
         try:
             p['nonexistentfield']
             self.fail('Attempts to access non-existent fields should fail.')