Ticket #2364: numericrangevalidator.diff

django/core/validators.py

@@ -324 +324 @@
             if field_name != self.field_name and value == field_data:
                 raise ValidationError, self.error_message
 
+class NumericRangeValidator(object):
+    def __init__(self, lower_bound=None, upper_bound=None, error_message=None):
+        self.lower_bound, self.upper_bound = lower_bound, upper_bound
+        gt_msg = ''
+        if not error_message:
+            if lower_bound and upper_bound:
+                gt_msg = "This value must be between %s and %s." % (lower_bound, upper_bound)
+            elif lower_bound:
+                gt_msg = "This value must be at least %s." % lower_bound
+            elif upper_bound:
+                gt_msg = "This value must be no more than %s." % upper_bound
+        self.error_message = error_message or gettext_lazy(gt_msg)
+
+    def __call__(self, field_data, all_data):
+        val = float(field_data)
+        crit1 = crit2 = True
+        if self.lower_bound:
+            crit1 = val >= self.lower_bound
+        if self.upper_bound:
+            crit2 = val <= self.upper_bound
+        if not (crit1 and crit2):
+            raise ValidationError, self.error_message
+
 class IsAPowerOf(object):
     """
     >>> v = IsAPowerOf(2)