ios - AWS graphql @connection没有按预期返回数组？

Question

我有一个graphql模型，如下所示(一个用户可以有很多帖子1:m)

type User @model {
  id: ID!
  fullName: String!
  emailAddress: String!
  posts: [Post] @connection(name: "UserPostConnection")
}

type Post @model {
  id: ID!
  text: String!
  user: User @connection(name: "UserPostConnection")
  createdAt: String
  updatedAt: String
}

我正在尝试返回特定用户的所有帖子，如下所示:

let queryInput = GetUserQuery(id: "879db4f2-1dad-47b9-b70d-8bca15bf2549")

appSyncClient?.fetch(query: queryInput, cachePolicy: .fetchIgnoringCacheData) { (result, error) in
            print(result?.data?.getUser?.posts)
        }
}        

但是结果不是返回数组，而是返回可选的:

Optional(AWSStackSocial.GetUserQuery.Data.GetUser.Post(snapshot: ["__typename": Optional("ModelPostConnection"), "nextToken": nil]))

我已经确认a)用户存在，b)帖子也存在。

在AWS上:

query {
    getUser(id: "879db4f2-1dad-47b9-b70d-8bca15bf2549") {
      id 
    posts {
      items {
        id
      }
    }
    }
}

输出:

{
  "data": {
    "getUser": {
      "id": "879db4f2-1dad-47b9-b70d-8bca15bf2549",
      "posts": {
        "items": [
          {
            "id": "04c4b571-6e92-4745-9a40-1a67a9d49d77"
          },
          {
            "id": "0f44fe6e-4e15-4a8c-b591-555e8fa1f60e"
          },
          {
            "id": "60c18c40-fea3-4ff3-8b21-df6857703dd2"
          }
        ]
      }
    }
  }
}

Answer 1

我找到了答案。放大GraphQL的默认深度级别为2，因此需要将其更改为3。这可以通过更改最大深度来完成:

amplify codegen configure