Implement DecimalField; close #5

Author: alexei

adapters/fields.py

@@ -2,10 +2,12 @@
 
 from __future__ import unicode_literals
 
+from decimal import Decimal
+
 from .base import BaseField
 
 
-__all__ = ['Field', 'CharField', 'FloatField', 'IntField']
+__all__ = ['Field', 'CharField', 'DecimalField', 'FloatField', 'IntField']
 
 
 class Field(BaseField):
@@ -17,6 +19,11 @@ def adapt(self, data):
         return unicode(data)
 
 
+class DecimalField(BaseField):
+    def adapt(self, data):
+        return Decimal(data)
+
+
 class FloatField(BaseField):
     def adapt(self, data):
         return float(data)

tests/test_fields.py

@@ -2,6 +2,7 @@
 
 from __future__ import unicode_literals
 
+from decimal import Decimal
 import unittest
 
 import adapters
@@ -32,3 +33,13 @@ def test_float_field_from_string(self):
         actual = adapters.FloatField().adapt('3.14159265359')
         expected = 3.14159265359
         self.assertEqual(actual, expected)
+
+    def test_decimal_field(self):
+        actual = adapters.DecimalField().adapt(0.4032505476)
+        expected = Decimal(0.4032505476)
+        self.assertAlmostEqual(actual, expected)
+
+    def test_decimal_field_from_string(self):
+        actual = adapters.DecimalField().adapt('0.7350977618')
+        expected = Decimal(0.7350977618)
+        self.assertAlmostEqual(actual, expected)