Internal Values for Enum doesn't work with mergeSchema

[taddyhuo]

I was trying to follow https://www.apollographql.com/docs/graphql-tools/scalars/#internal-values

TypeDefs:

const typeDefs = `
  type Query {
    getTask(taskId: ID!): Task!
  }
  enum StatusEnum {
    ACTIVE
    INACTIVE
  }

  type TestTask {
    status: StatusEnum
  }
`

Resolvers:

const resolvers = {
  Query: {
    getTestTask: () => {
      return { status: 0 };
    },
  },

  StatusEnum: {
    ACTIVE: 0,
    INACTIVE: 1,
  }
}

query:

query GetTestTask($taskId: ID!) {
  getTestTask(taskId: $taskId) {
    status
  }
}

However, I got "Expected a value of type \"StatusEnum\" but received: \"ACTIVE\"". Any idea why?

graphql: 14.6.0
graphql-tools: 4.0.7
apollo-server-express: 2.11.0

FYI: I use mergeSchema from apollo-server-express to combine multiple schemas.

Here is full error log:

{
  "errors": [
    {
      "message": "Expected a value of type \"StatusEnum\" but received: \"ACTIVE\"",
      "locations": [
        {
          "line": 3,
          "column": 5
        }
      ],
      "path": [
        "getTestTask",
        "status"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "stacktrace": [
            "Error: Expected a value of type \"StatusEnum\" but received: \"ACTIVE\"",
            "    at completeLeafValue (/code/xxx/node_modules/graphql/execution/execute.js:638:11)",
            "    at completeValue (/code/xxx/node_modules/graphql/execution/execute.js:579:12)",
            "    at completeValueCatchingError (/code/xxx/node_modules/graphql/execution/execute.js:495:19)",
            "    at resolveField (/code/xxx/node_modules/graphql/execution/execute.js:435:10)",
            "    at executeFields (/code/xxx/node_modules/graphql/execution/execute.js:275:18)",
            "    at collectAndExecuteSubfields (/code/xxx/node_modules/graphql/execution/execute.js:713:10)",
            "    at completeObjectValue (/code/xxx/node_modules/graphql/execution/execute.js:703:10)",
            "    at completeValue (/code/xxx/node_modules/graphql/execution/execute.js:591:12)",
            "    at completeValue (/code/xxx/node_modules/graphql/execution/execute.js:557:21)",
            "    at /code/xxx/node_modules/graphql/execution/execute.js:492:16"
          ]
        }
      }
    }
  ],
  "data": {
    "getTestTask": {
      "status": null
    }
  }
}

[yaacovCR]

This is a known issue with the upstream repository affecting transformSchema and mergeSchemas, fixed in graphql-tools-fork.

See #1056 and #1206

Apollo is not accepting bug fixes, unfortunately, but the fork should work as a drop in replacement.

[taddyhuo]

Thank you! I will close this issue.