graphqljs在输出字段的突变中更新上下文

Question

我有一个想要更改上下文的突变。 简化的突变如下所示：

const UserType = new GraphQLObjectType({
  name: 'User',
  fields: () => ({
    someData: {
      type: GraphQLList(GraphQLString),
      resolve: (user, args, context) => getUserData(context.location) // here context is { location: oldLocation }
    },
  })
})

const someMutation = mutationWithClientMutationId({
  name: 'someMutation',
  inputFields: {
    location: { type: GraphQLString },
  },
  outputFields: {
    user: {
      type: UserType,
      resolve: (source, args, context) => getUser(context.location),
    },
  },
  mutateAndGetPayload: async (data, context) => {

    // I have tried this but it's not working.
    console.log('TCL: context, before', context) // here context = { location: oldLocation }
    context = { location: data.location }
    console.log('TCL: context, after', context) // here context = { location: newLocation }

    return { }
  },
})

现在，在UserType中，我有一个使用上下文的字段，并且希望它包含newLocation，但是在登录时，我看到的是oldLocation。如何为该突变及其内部的每个字段更新上下文，以使这种情况得以解决？