Date format support

voluptuous/error.py

@@ -169,6 +169,10 @@ class DatetimeInvalid(Invalid):
     """The value is not a formatted datetime string."""
 
 
+class DateInvalid(Invalid):
+    """The value is not a formatted date string."""
+
+
 class InInvalid(Invalid):
     pass
 

voluptuous/tests/tests.py

@@ -6,7 +6,7 @@
     Schema, Required, Optional, Extra, Invalid, In, Remove, Literal,
     Url, MultipleInvalid, LiteralInvalid, NotIn, Match, Email,
     Replace, Range, Coerce, All, Any, Length, FqdnUrl, ALLOW_EXTRA, PREVENT_EXTRA,
-    validate, ExactSequence, Equal, Unordered, Number
+    validate, ExactSequence, Equal, Unordered, Number, Date, Datetime
 )
 from voluptuous.humanize import humanize_error
 from voluptuous.util import to_utf8_py2, u
@@ -745,3 +745,16 @@ def test_named_tuples_validate_as_tuples():
     Schema((int, int))(t)
     Schema(NT(int, int))(nt)
     Schema(NT(int, int))(t)
+
+
+def test_datetime():
+    schema = Schema({"datetime": Datetime()})
+    schema({"datetime": "2016-10-24T14:01:57.102152Z"})
+    assert_raises(MultipleInvalid, schema, {"datetime": "2016-10-24T14:01:57"})
+
+
+def test_date():
+    schema = Schema({"date": Date()})
+    schema({"date": "2016-10-24"})
+    assert_raises(MultipleInvalid, schema, {"date": "2016-10-2"})
+    assert_raises(MultipleInvalid, schema, {"date": "2016-10-24Z"})

voluptuous/validators.py

@@ -9,14 +9,14 @@
     from schema_builder import Schema, raises, message
     from error import (MultipleInvalid, CoerceInvalid, TrueInvalid, FalseInvalid, BooleanInvalid, Invalid, AnyInvalid,
                        AllInvalid, MatchInvalid, UrlInvalid, EmailInvalid, FileInvalid, DirInvalid, RangeInvalid,
-                       PathInvalid, ExactSequenceInvalid, LengthInvalid, DatetimeInvalid, InInvalid, TypeInvalid,
-                       NotInInvalid)
+                       PathInvalid, ExactSequenceInvalid, LengthInvalid, DatetimeInvalid, DateInvalid, InInvalid,
+                       TypeInvalid, NotInInvalid)
 except ImportError:
     from .schema_builder import Schema, raises, message
     from .error import (MultipleInvalid, CoerceInvalid, TrueInvalid, FalseInvalid, BooleanInvalid, Invalid, AnyInvalid,
                         AllInvalid, MatchInvalid, UrlInvalid, EmailInvalid, FileInvalid, DirInvalid, RangeInvalid,
-                        PathInvalid, ExactSequenceInvalid, LengthInvalid, DatetimeInvalid, InInvalid, TypeInvalid,
-                        NotInInvalid)
+                        PathInvalid, ExactSequenceInvalid, LengthInvalid, DatetimeInvalid, DateInvalid, InInvalid,
+                        TypeInvalid, NotInInvalid)
 
 
 if sys.version_info >= (3,):
@@ -587,6 +587,29 @@ def __repr__(self):
         return 'Datetime(format=%s)' % self.format
 
 
+class Date(Datetime):
+    """Validate that the value matches the date format."""
+
+    DEFAULT_FORMAT = '%Y-%m-%d'
+    FORMAT_DESCRIPTION = 'yyyy-mm-dd'
+
+    def __call__(self, v):
+        try:
+            datetime.datetime.strptime(v, self.format)
+            if len(v) != len(self.FORMAT_DESCRIPTION):
+                raise DateInvalid(
+                    self.msg or 'value has invalid length'
+                                ' expected length %d (%s)' % (len(self.FORMAT_DESCRIPTION), self.FORMAT_DESCRIPTION))
+        except (TypeError, ValueError):
+            raise DateInvalid(
+                self.msg or 'value does not match'
+                            ' expected format %s' % self.format)
+        return v
+
+    def __repr__(self):
+        return 'Date(format=%s)' % self.format
+
+
 class In(object):
     """Validate that a value is in a collection."""