Fixed #27431 -- Prevented disabled form fields from appearing as changed.

1 files changed, 4 insertions, 0 deletions

diff --git a/django/forms/fields.py b/django/forms/fields.py
index d9552c28fe..74cc3a6552 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -187,6 +187,10 @@ class Field(object):
         """
         Return True if data differs from initial.
         """
+        # Always return False if the field is disabled since self.bound_data
+        # always uses the initial value in this case.
+        if self.disabled:
+            return False
         try:
             data = self.to_python(data)
             if hasattr(self, '_coerce'):