Ticket #17637: pattern_charfield.patch

django/forms/fields.py

@@ -182 +182 @@
         return result
 
 class CharField(Field):
-    def __init__(self, max_length=None, min_length=None, *args, **kwargs):
-        self.max_length, self.min_length = max_length, min_length
+    # Supply the validation pattern as Regular Expression
+    def __init__(self, max_length=None, min_length=None,pattern=None, *args, **kwargs):
+        self.max_length, self.min_length, self.pattern = max_length, min_length, pattern
         super(CharField, self).__init__(*args, **kwargs)
         if min_length is not None:
             self.validators.append(validators.MinLengthValidator(min_length))
         if max_length is not None:
             self.validators.append(validators.MaxLengthValidator(max_length))
-
+        
     def to_python(self, value):
         "Returns a Unicode object."
         if value in validators.EMPTY_VALUES:
@@ -201 +202 @@
         if self.max_length is not None and isinstance(widget, (TextInput, PasswordInput)):
             # The HTML attribute is maxlength, not max_length.
             attrs.update({'maxlength': str(self.max_length)})
+            if self.pattern:
+                attrs.update({'pattern':str(self.pattern)})
         return attrs
 
 class IntegerField(Field):