Merge pull request #13 from mmarta/master

Added new currency field with two decimal place precision.

AUTHORS.rst

@@ -12,3 +12,4 @@ Contributors
 
 * Khaled Porlin - https://github.com/porlin72
 * Agam Dua - https://github.com/agamdua
+* Marc Marta - https://github.com/mmarta

drf_braces/fields/custom.py

@@ -65,3 +65,23 @@ class NumericField(ValueAsTextFieldMixin, fields.IntegerField):
 
 __all__ = [name for name, value in locals().items()
            if inspect.isclass(value) and issubclass(value, fields.Field)]
+
+
+class RoundedDecimalField(fields.DecimalField):
+    """
+    Currency field subclass of Decimal used for rounding currencies
+    to two decimal places.
+    """
+
+    def __init__(self, max_digits=100, decimal_places=2, *args, **kwargs):
+        super(fields.DecimalField, self).__init__(
+            max_digits=max_digits,
+            decimal_places=decimal_places,
+            *args, **kwargs
+        )
+
+    def to_internal_value(self, data):
+        return self.quantize(super(RoundedDecimalField, self).to_internal_value(data))
+
+    def validate_precision(self, data):
+        return data

drf_braces/tests/fields/test_custom.py

@@ -1,13 +1,15 @@
 from __future__ import print_function, unicode_literals
 import unittest
 from collections import OrderedDict
+from decimal import Decimal
 
 import mock
 import pytz
 
 from drf_braces.fields.custom import (
     NonValidatingChoiceField,
     PositiveIntegerField,
+    RoundedDecimalField,
     UTCDateTimeField,
     UnvalidatedField,
 )
@@ -55,3 +57,16 @@ def test_to_internal_value(self):
 
         self.assertEqual(field.to_internal_value('bar'), 'bar')
         self.assertEqual(field.to_internal_value('haha'), 'haha')
+
+
+class TestCurrencyField(unittest.TestCase):
+    def test_init(self):
+        field = RoundedDecimalField()
+        self.assertIsNotNone(field.max_digits)
+        self.assertEqual(field.decimal_places, 2)
+
+    def test_to_internal_value(self):
+        field = RoundedDecimalField()
+        self.assertEqual(field.to_internal_value(Decimal('5.2345')), Decimal('5.23'))
+        self.assertEqual(field.to_internal_value(Decimal('5.2356')), Decimal('5.24'))
+        self.assertEqual(field.to_internal_value(Decimal('4.2399')), Decimal('4.24'))