我正在尝试用一个网关和 3 个实现微服务来组成一个联合阿波罗服务。
MS1:
type Movie @key(fields: "id name") {
id: String!
name: String
}
MS2:
type Location @key(fields: "id") {
id: String!
longitude: Float!
latitude: Float!
}
type Movie @key(fields: "id") @extends {
id: String! @external
location: Location
}
MS3:
type Award @key(fields: "name"){
name: String!
count: Int
}
type Movie @key(fields: "name") @extends {
name: String! @external
award: Award
}
MS1 提供name和id。 name应发送到 MS3 用于解析过程,id应由 MS2 用于解析过程。
这种方法适用于旧版本的 apollo-gateway / apollo-server,但在最新版本中我收到以下错误消息。
{"stack":"Error: A valid schema couldn't be composed. The following composition errors were found:\n\t[ms2] Movie -> extends from ms1 but specifies an invalid @key directive. Valid @key directives are specified by the originating type. Available @key directives for this type are:\n\t@key(fields: \"id name\")\n ...}
提供这样的密钥的方法也不起作用:
type Movie @key(fields: "id") @key(fields: "name") {
模式必须是什么样子才能提供所描述的用例?