GraphQLEnumType doesn't work if value doesnt match the key

[stringbeans]

Experiencing this in both 14.4.0 and 14.3.1 with apollo-server-express@2.6.2

I have a simple query:

const LanguageCode = new GraphQLEnumType({
  name: 'LanguageCode',
  values: {
    en: {
      value: 'english'
    },
    fr: {
      value: 'french'
    }
  }
})

export default {
  type: ListResultInterface(SchoolCompanyPromotionObject),
  args: {
    languageCode: {
      type: LanguageCode
    }
  },
  resolve
}

However, when I try to access this query...

query {
  myQuery(languageCode: en) {
    # ...fields
  }
}

I receive the following error: "Variable \"$_v1_languageCode\" got invalid value \"english\"; Expected type LanguageCode."

However, if I map the value to be the same as the key (en: {value: 'en'}) then the query works.

[stringbeans]

hmm... after digging into it a little bit I've noticed that this occurs only if i use mergeSchemas fn from graphql-tools to produce the schema to pass into apollo-server-express. if i use the schema directly then it works fine..

[stringbeans]

i was able to fix this problem by reverting to graphql@0.13.0 and graphql-tools@2.22.0. seems as though its something with schema stitching but i had to revert both graphql and graphql-tool packages in order to properly fix the issue

[IvanGoncharov]

@stringbeans It's the issue with graphql-tools and reported here: ardatan/graphql-tools#1033
Also fixed here: ardatan/graphql-tools#1075

[stringbeans]

@IvanGoncharov thank you so much!