Add additional sqlalchemy_utils types

Add most trivial string types from sqlalchemy_utils:
UUIDType, EmailType, URLType, and IPAddressType

Author: ianepperson

graphene_sqlalchemy/converter.py

@@ -17,9 +17,11 @@
 from .resolvers import get_attr_resolver, get_custom_resolver
 
 try:
-    from sqlalchemy_utils import ChoiceType, JSONType, ScalarListType, TSVectorType
+    from sqlalchemy_utils import (ChoiceType, JSONType, ScalarListType, TSVectorType,
+                                  UUIDType, EmailType, URLType, IPAddressType)
 except ImportError:
     ChoiceType = JSONType = ScalarListType = TSVectorType = object
+    UUIDType = EmailType = URLType = IPAddressType = object
 
 
 is_selectin_available = getattr(strategies, 'SelectInLoader', None)
@@ -184,6 +186,10 @@ def convert_sqlalchemy_type(type, column, registry=None):
 @convert_sqlalchemy_type.register(postgresql.INET)
 @convert_sqlalchemy_type.register(postgresql.CIDR)
 @convert_sqlalchemy_type.register(TSVectorType)
+@convert_sqlalchemy_type.register(UUIDType)
+@convert_sqlalchemy_type.register(EmailType)
+@convert_sqlalchemy_type.register(URLType)
+@convert_sqlalchemy_type.register(IPAddressType)
 def convert_column_to_string(type, column, registry=None):
     return String