Enum cannot represent value

[n00el]

Enum cannot represent value

[erikwrede]

Thank you for the report 🙂
Can you please share something about the versions of graphene-sqlalchemy, sqlalchemy and graphene you're using and provide a reprodction including all involved ObjectTypes, Models, Enums and the Query? Without seeing the definition of AccommodationStatus it's hard to give any advice here.

[n00el]

Thank you for your fast reply! Sorry for the informations that I left out.

sqlalchemy: 1.4.46
graphene: 3.2.1
starlette-graphene3: 0.6.0
graphene-sqlalchemy: 3.0.0b3

Here is my enum:

class AccommodationStatus(str, Enum):
	creating = 'creating'
	active = 'active'
	inactive = 'inactive'

Here is my schema:

class CombinedQuery(graphene.ObjectType):
	accommodations = graphene.List(AccommodationGraphQL)
	def resolve_accommodations(self, info):
		query = AccommodationGraphQL.get_query(info)
		return query.all()

schema = graphene.Schema(query=CombinedQuery)

And here is my query:

query {
  accommodations {
    id
    status
  }
}

---

If I modify my status field to a string in the ObjectType it will work and , but that takes away the advantages provided by enums

class AccommodationGraphQL(SQLAlchemyObjectType):
	class Meta:
		model = AccommodationModel

	status = graphene.String()

OR if I write a custom resolver it will work again, but then I need to write resolvers to all my enums:

	def resolve_status(self, info):
		return self.status.value

[erikwrede]

Tried your code, but cannot reproduce the problem. Does it work for you with exactly this code? You can try putting it into a pytest testcase 🙂

class AccommodationStatus(str, PyEnum):
    creating = 'creating'
    active = 'active'
    inactive = 'inactive'

class AccommodationModel(Base):
    __tablename__ = "accommodations"
    id = Column(Integer, primary_key=True)
    status = Column(Enum(AccommodationStatus), nullable=False, default=AccommodationStatus.creating)

class AccommodationGraphQL(SQLAlchemyObjectType):
    class Meta:
        model = AccommodationModel

    status = graphene.String()

class CombinedQuery(graphene.ObjectType):
    accommodations = graphene.List(AccommodationGraphQL)

    def resolve_accommodations(self, info):
        return [AccommodationModel(id=1, status=AccommodationStatus.creating)]

schema = graphene.Schema(query=CombinedQuery)
query = """
query {
    accommodations {
    id
    status
    }
}
"""
result = schema.execute(query)
print(result)
print(json.dumps(result.formatted))

Enum 'AccommodationStatus' cannot represent value: <AccommodationStatus.active: 'creating'>
Judging by this error message, is there any chance this error was caused by you accidentally initializing the enum with status string active instead of creating when setting the enum value to active?

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