Apollo federation throws error: marked @external but is not defined on the base service of

Question

我正在使用 apollo federation 并在尝试制作类似于计算字段的内容时遇到错误 (https://www.apollographql.com/docs/federation/entities/#extending-an-entity-with-computed-fields-advanced):

Error: A valid schema couldn't be composed. The following composition errors were found:client-api-gateway_1
[Payments MS] User.parentId -> marked @external but parentId is not defined on the base service of User (Users MS)

我有两个服务：Users 和 Payments。在 users 服务中，我存储有关用户的信息，并在 payments 中存储有关与用户相关的付款信息。

Users 服务图表：

type User @key(fields: "id") {
        id: Int!
        name: String!
        surname: String!
        type: USER_TYPE!
        parentId: Int
    }

Payments 服务图表：

type UserSubscriptionInfo {
     nextChargeAmount: Int
     ......etc
}

extend type User @key(fields: "id") {
     id: Int! @external
     parentId: Int @external
     subscription: UserSubscriptionInfo @requires(fields: "parentId")
}

基于 parentId 来自用户类型我想通过扩展 User 类型获得订阅。

Answer 1

确保将两个 graphql 模式放在同一个网关中。在我的应用程序中有 2 个不同的网关，我将它们放在 2 个不同的网关中。上面的代码运行完美。