Added URLType

sqlalchemy_utils/types/url.py

@@ -0,0 +1,28 @@
+furl = None
+try:
+    from furl import furl
+except ImportError:
+    pass
+import six
+from sqlalchemy import types
+from .scalar_coercible import ScalarCoercible
+
+
+class UrlType(types.TypeDecorator, ScalarCoercible):
+    impl = types.UnicodeText
+
+    def process_bind_param(self, value, dialect):
+        if isinstance(value, furl):
+            return value.code
+
+        if isinstance(value, six.string_types):
+            return value
+
+    def process_result_value(self, value, dialect):
+        if value is not None:
+            return furl(value)
+
+    def _coerce(self, value):
+        if value is not None and not isinstance(value, furl):
+            return furl(value)
+        return value