Don't format error messages on validators, fixes #3354

Author: nryoung

rest_framework/fields.py

@@ -820,11 +820,9 @@ def __init__(self, **kwargs):
         self.min_value = kwargs.pop('min_value', None)
         super(IntegerField, self).__init__(**kwargs)
         if self.max_value is not None:
-            message = self.error_messages['max_value'].format(max_value=self.max_value)
-            self.validators.append(MaxValueValidator(self.max_value, message=message))
+            self.validators.append(MaxValueValidator(self.max_value))
         if self.min_value is not None:
-            message = self.error_messages['min_value'].format(min_value=self.min_value)
-            self.validators.append(MinValueValidator(self.min_value, message=message))
+            self.validators.append(MinValueValidator(self.min_value))
 
     def to_internal_value(self, data):
         if isinstance(data, six.text_type) and len(data) > self.MAX_STRING_LENGTH:
@@ -854,11 +852,9 @@ def __init__(self, **kwargs):
         self.min_value = kwargs.pop('min_value', None)
         super(FloatField, self).__init__(**kwargs)
         if self.max_value is not None:
-            message = self.error_messages['max_value'].format(max_value=self.max_value)
-            self.validators.append(MaxValueValidator(self.max_value, message=message))
+            self.validators.append(MaxValueValidator(self.max_value))
         if self.min_value is not None:
-            message = self.error_messages['min_value'].format(min_value=self.min_value)
-            self.validators.append(MinValueValidator(self.min_value, message=message))
+            self.validators.append(MinValueValidator(self.min_value))
 
     def to_internal_value(self, data):
         if isinstance(data, six.text_type) and len(data) > self.MAX_STRING_LENGTH:
@@ -903,11 +899,9 @@ def __init__(self, max_digits, decimal_places, coerce_to_string=None, max_value=
         super(DecimalField, self).__init__(**kwargs)
 
         if self.max_value is not None:
-            message = self.error_messages['max_value'].format(max_value=self.max_value)
-            self.validators.append(MaxValueValidator(self.max_value, message=message))
+            self.validators.append(MaxValueValidator(self.max_value))
         if self.min_value is not None:
-            message = self.error_messages['min_value'].format(min_value=self.min_value)
-            self.validators.append(MinValueValidator(self.min_value, message=message))
+            self.validators.append(MinValueValidator(self.min_value))
 
     def to_internal_value(self, data):
         """