newforms: Implemented min_value and max_value options for IntegerField

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4218 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/newforms/fields.py

@@ -93,6 +93,10 @@ def widget_attrs(self, widget):
             return {'maxlength': str(self.max_length)}
 
 class IntegerField(Field):
+    def __init__(self, max_value=None, min_value=None, required=True, widget=None, label=None):
+        self.max_value, self.min_value = max_value, min_value
+        Field.__init__(self, required, widget, label)
+
     def clean(self, value):
         """
         Validates that int() can be called on the input. Returns the result
@@ -102,9 +106,14 @@ def clean(self, value):
         if not self.required and value in EMPTY_VALUES:
             return u''
         try:
-            return int(value)
+            value = int(value)
         except (ValueError, TypeError):
             raise ValidationError(gettext(u'Enter a whole number.'))
+        if self.max_value is not None and value > self.max_value:
+            raise ValidationError(gettext(u'Ensure this value is less than or equal to %s.') % self.max_value)
+        if self.min_value is not None and value < self.min_value:
+            raise ValidationError(gettext(u'Ensure this value is greater than or equal to %s.') % self.min_value)
+        return value
 
 DEFAULT_DATE_INPUT_FORMATS = (
     '%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', # '2006-10-25', '10/25/2006', '10/25/06'

tests/regressiontests/forms/tests.py

@@ -769,6 +769,71 @@
 ...
 ValidationError: [u'Enter a whole number.']
 
+IntegerField accepts an optional max_value parameter:
+>>> f = IntegerField(max_value=10)
+>>> f.clean(None)
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean(1)
+1
+>>> f.clean(10)
+10
+>>> f.clean(11)
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value is less than or equal to 10.']
+>>> f.clean('10')
+10
+>>> f.clean('11')
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value is less than or equal to 10.']
+
+IntegerField accepts an optional min_value parameter:
+>>> f = IntegerField(min_value=10)
+>>> f.clean(None)
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean(1)
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value is greater than or equal to 10.']
+>>> f.clean(10)
+10
+>>> f.clean(11)
+11
+>>> f.clean('10')
+10
+>>> f.clean('11')
+11
+
+min_value and max_value can be used together:
+>>> f = IntegerField(min_value=10, max_value=20)
+>>> f.clean(None)
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean(1)
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value is greater than or equal to 10.']
+>>> f.clean(10)
+10
+>>> f.clean(11)
+11
+>>> f.clean('10')
+10
+>>> f.clean('11')
+11
+>>> f.clean(20)
+20
+>>> f.clean(21)
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value is less than or equal to 20.']
+
 # DateField ###################################################################
 
 >>> import datetime