Implement ListField; close #10

Author: alexei

adapters/fields.py

@@ -19,6 +19,7 @@
     'DecimalField',
     'FloatField',
     'IntField',
+    'ListField',
     'TimeField',
     'VerbatimField',
 ]
@@ -78,10 +79,6 @@ def prepare(self, data):
         return Decimal(data)
 
 
-class VerbatimField(BaseField):
-    pass
-
-
 class FloatField(BaseField):
     def prepare(self, data):
         return float(data)
@@ -92,6 +89,15 @@ def prepare(self, data):
         return int(data)
 
 
+class ListField(BaseField):
+    def __init__(self, child, **kwargs):
+        self.child = child
+        super(ListField, self).__init__(**kwargs)
+
+    def prepare(self, data):
+        return [self.child().adapt(item) for item in data]
+
+
 class TimeField(BaseField):
     def prepare(self, data):
         if isinstance(data, datetime.time):
@@ -100,3 +106,7 @@ def prepare(self, data):
             return dateutil.parser.parse(data).timetz()
         else:
             raise ValueError("Invalid time argument")
+
+
+class VerbatimField(BaseField):
+    pass

tests/test_fields.py

@@ -162,3 +162,8 @@ def test_optional_field_with_default(self):
         for entry in data:
             actual = field.adapt(entry)
             self.assertEqual(actual, expected)
+
+    def test_list_field(self):
+        actual = adapters.ListField(adapters.CharField).adapt([1, 2, 3])
+        expected = ['1', '2', '3']
+        self.assertEqual(actual, expected)