Question

我具有以下解析程序设置：

#set($questions = [])
#foreach($item in ${ctx.args.questions})
    #set($item.id = $util.dynamodb.toDynamoDBJson($util.autoId()))
    $util.qr($questions.add($util.dynamodb.toMapValues($item)))
#end
{
    "version" : "2018-05-29",
    "operation" : "BatchPutItem",
    "tables" : {
        "QuestionTable": $utils.toJson($questions)
    }
}

以及以下GraphQL模式：

input CreateQuestionInput {
    text: String
    sectionId: ID!
}

input CreateScoreInput {
    score: Int!
    questionId: ID!
    userId: ID!
}

input CreateSectionInput {
    title: String
    subSection: String
}

input DeleteQuestionInput {
    id: ID!
}

input DeleteScoreInput {
    id: ID!
}

input DeleteSectionInput {
    id: ID!
}

type Mutation {
    ...
    createQuestion(input: CreateQuestionInput!): Question
    batchCreateQuestion(questions: [CreateQuestionInput]!): [Question]

}

type Query {
    getSection(id: ID!): Section
    listSections(filter: TableSectionFilterInput, limit: Int, nextToken: String): SectionConnection
    getScore(id: ID!): Score
    listScores(filter: TableScoreFilterInput, limit: Int, nextToken: String): ScoreConnection
    getQuestion(id: ID!): Question
    listQuestions(filter: TableQuestionFilterInput, limit: Int, nextToken: String): QuestionConnection
}

type Question {
    id: ID!
    text: String
    sectionId: ID!
}

type QuestionConnection {
    items: [Question]
    nextToken: String
}

type Schema {
    query: Query
}

type Score {
    id: ID!
    score: Int!
    questionId: ID!
    userId: ID!
}

type ScoreConnection {
    items: [Score]
    nextToken: String
}

type Section {
    id: ID!
    title: String
    subSection: String
    questions: [Question]
}

type SectionConnection {
    items: [Section]
    nextToken: String
}

input TableQuestionFilterInput {
    id: TableIDFilterInput
    text: TableStringFilterInput
    sectionId: TableIDFilterInput
}

input UpdateQuestionInput {
    id: ID!
    text: String
    sectionId: ID
}

（我已经编辑了一些架构，因为它相当大）。

当我尝试运行查询时：

mutation BatchCreateQuestions($sec: ID!) {
  batchCreateQuestion(questions: [
    {
      text: "Tester 1"
      sectionId: $sec
    },
    {
      text: "Tester 2",
      sectionId: $sec
    }
  ]) {
    id
    text
    sectionId
  }
}

带有变量：

{ "sec": "abc123" }

我得到答复：

{
"data": {
    "batchCreateQuestion": [
      null,
      null
    ]
  }
}

当我检查DynamoDB表时，它没有保存值。我已经为该数据源授予了完全的dynamodb权限，但仍然没有任何乐趣。

Answer 1

结果是，我授予了对类似名称角色的批量写入权限，而不是影响该数据源的角色。如果您看到类似的问题，请检查您的IAM角色/权限。傻我

Answer 2

您的响应模板在解析器中是什么样的？基于上面的表名称为$util.toJson($ctx.result.data.QuestionTable)，它应该为QuestionTable，因为它会自动转换为响应上下文。

AppSync批处理插入DynamoDB失败并返回null

2 个答案: