Add Email type

graphene/types/email.py

@@ -0,0 +1,36 @@
+from __future__ import absolute_import
+
+
+from graphql import Undefined
+from graphql.language.ast import StringValueNode
+import json
+from .scalars import Scalar
+
+
+class Email(Scalar):
+ """
+ Allows use of a JSON String for input / output from the GraphQL schema.
+
+ Use of this type is *not recommended* as you lose the benefits of having a defined, static
+ schema (one of the key benefits of GraphQL).
+ """
+
+ @staticmethod
+ def serialize(dt):
+ return json.dumps(dt)
+
+ @staticmethod
+ def parse_literal(node, _variables=None):
+ # email_validator 
+ # https://pypi.org/project/email-validator/
+ # max_length=254 to be compliant with RFCs 3696 and 5321
+ if isinstance(node, StringValueNode):
+ try:
+ return json.loads(node.value)
+ except Exception as error:
+ raise ValueError(f"Badly formed JSONString: {str(error)}")
+ return Undefined
+
+ @staticmethod
+ def parse_value(value):
+ return json.loads(value)