node.js - Apollo federation 抛出错误：标记为 @external 但未在基础服务上定义

Question

我正在使用 apollo federation 并遇到错误，当尝试制作类似于计算字段的东西时（https://www.apollographql.com/docs/federation/entities/#extending-an-entity-with-computed-fields-高级）：

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payments信息，以及与用户相关的支付信息。

Users服务图：

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

Payments服务图：

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类型来获得订阅。

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。上面的代码运行良好。