无效输入'on'：在创建突变时，期望\n\“*”\n\]\\n\“{\n\”\“\n\”\n个参数

Question

我已经创建了一个neo4j graphql，它执行CRUD操作并试图实现突变，但是我收到了这个错误，不知道为什么会发生这种情况。

我没有遇到任何问题，实现这个页面的突变。但是当我尝试我自己的例子时，我得到了这个错误，并且无法解决它。

{
  "errors": [
    {
      "message": "Invalid input 'on': expected\n  \"*\"\n  \"]\"\n  \"{\"\n  \"|\"\n  a parameter (line 11, column 26 (offset: 360))\n\"MERGE (this0)-[:Activity on]->(this0_activityonDisease0_node)\"\n                          ^",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "createUsers"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "code": "Neo.ClientError.Statement.SyntaxError",
          "name": "Neo4jError",
          "stacktrace": [
            "Neo4jError: Invalid input 'on': expected",
            "  \"*\"",
            "  \"]\"",
            "  \"{\"",
            "  \"|\"",
            "  a parameter (line 11, column 26 (offset: 360))",
            "\"MERGE (this0)-[:Activity on]->(this0_activityonDisease0_node)\"",
            "                          ^",
            "",
            "    at captureStacktrace (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\neo4j-driver-core\\lib\\result.js:239:17)",
            "    at new Result (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\neo4j-driver-core\\lib\\result.js:59:23)",
            "    at newCompletedResult (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\neo4j-driver-core\\lib\\transaction.js:433:12)",
            "    at Object.run (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\neo4j-driver-core\\lib\\transaction.js:287:20)",
            "    at Transaction.run (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\neo4j-driver-core\\lib\\transaction.js:137:34)",
            "    at execute (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\@neo4j\\graphql\\dist\\utils\\execute.js:87:51)",
            "    at resolve (C:\\Users\\DELL\\Documents\\GitHub\\graphql-testing\\node_modules\\@neo4j\\graphql\\dist\\schema\\resolvers\\mutation\\create.js:34:57)",
            "    at processTicksAndRejections (internal/process/task_queues.js:95:5)"
          ]
        }
      }
    }
  ],
  "data": null
}

下面给出了我使用的type definitions和mutations。

const typeDefs = gql`
type Disease {
    name: String
    medication: String
    period: String
    userActivityon: User @relationship(type: "Activity on", direction: IN)
  }
  
  type User {
    name: String
    age: Int
    sex: String
    weight: Int
    smoking: Boolean
    drinking: Boolean
    nationality: String
    birth_type: String
    activityonDisease: Disease @relationship(type: "Activity on", direction: OUT)
  }
`;

mutation{
  createUsers(input: {
    name:"harsha"
    age:22
    sex:"male"
    activityonDisease:{create:{node:{
      name:"cold"
      medication:"months"
      }}}
  }) {
    users {
      name
      age
      activityonDisease {
        name
        medication
      }
    }
  }
}

有人能指出我做错了什么吗？

Answer 1

您正在为relationship type提供空格分隔的单词，如下所示：

@relationship(type: "Activity on", direction: IN)
@relationship(type: "Activity on", direction: OUT)

这导致了错误。如果您想对一个relationship type使用多个单词，用下划线分隔它们，并保留所有的字母大写，这是推荐的方法。在任何定义关系的地方，都可以这样做：

@relationship(type: "ACTIVITY_ON", direction: IN)
@relationship(type: "ACTIVITY_ON", direction: OUT)