Support 'on'/'off' literals with BooleanField. Closes #4624 (#4640)

rest_framework/fields.py

@@ -644,8 +644,20 @@ class BooleanField(Field):
     }
     default_empty_html = False
     initial = False
-    TRUE_VALUES = {'t', 'T', 'true', 'True', 'TRUE', '1', 1, True}
-    FALSE_VALUES = {'f', 'F', 'false', 'False', 'FALSE', '0', 0, 0.0, False}
+    TRUE_VALUES = {
+        't', 'T',
+        'true', 'True', 'TRUE',
+        'on', 'On', 'ON',
+        '1', 1,
+        True
+    }
+    FALSE_VALUES = {
+        'f', 'F',
+        'false', 'False', 'FALSE',
+        'off', 'Off', 'OFF',
+        '0', 0, 0.0,
+        False
+    }
 
     def __init__(self, **kwargs):
         assert 'allow_null' not in kwargs, '`allow_null` is not a valid option. Use `NullBooleanField` instead.'