Error: Unknown directive "relation". with Grand-stack of neo4j

Question

我正在尝试使用 neo4j 的 grand-stack-starter 并在完成所有 graphql 模式部分后使用 API 模块出现以下错误。它抱怨指令 'relation' 和 'cypher' 未知。我重新安装了 neo4j-graphql-js 但没有解决问题。下面是错误信息

grand-stack-starter-api@0.0.1 start C:\Users\grand-stack-starter-master\api
nodemon --exec babel-node src/index.js

[nodemon] 1.18.9
[nodemon] to restart at any time, enter rs
[nodemon] watching: .
[nodemon] starting babel-node src/index.js
C:\Users\grand-stack-starter-master\api\node_modules\graphql\validation\validate.js:89
throw new Error(errors.map(function (error) {
^

Error: Unknown directive "relation".

Unknown directive "relation".

Unknown directive "cypher".

Unknown directive "cypher".

Unknown directive "relation".

Unknown directive "relation".

Unknown directive "relation".

Unknown directive "relation".

Unknown directive "relation".

Unknown directive "cypher".
    at assertValidSDL (C:\Users\N19683\grand-stack-starter-master\api\node_modules\graphql\validation\validate.js:89:11)
    at Object.buildASTSchema (C:\Users\N19683\grand-stack-starter-master\api\node_modules\graphql\utilities\buildASTSchema.js:67:34)
    at Object.buildSchemaFromTypeDefinitions (C:\Users\N19683\grand-stack-starter-master\api\node_modules\graphql-tools\src\generate\buildSchemaFromTypeDefinitions.ts:43:32)
    at makeExecutableSchema (C:\Users\N19683\grand-stack-starter-master\api\node_modules\graphql-tools\src\makeExecutableSchema.ts:52:16)
    at Object.<anonymous> (C:/Users/N19683/grand-stack-starter-master/api/src/index.js:18:16)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at loader (C:\Users\N19683\grand-stack-starter-master\api\node_modules\babel-register\lib\node.js:144:5)
    at Object.require.extensions.(anonymous function) [as .js] (C:\Users\N19683\grand-stack-starter-master\api\node_modules\babel-register\lib\node.js:154:7)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
**

下面是graphql-schema.js

import { neo4jgraphql } from "neo4j-graphql-js";

export const typeDefs = `
type User {
  id: ID!
  name: String
  friends: [User] @relation(name: "FRIENDS", direction: "BOTH")
  reviews: [Review] @relation(name: "WROTE", direction: "OUT")
  avgStars: Float
    @cypher(
      statement: "MATCH (this)-[:WROTE]->(r:Review) RETURN toFloat(avg(r.stars))"
    )
  numReviews: Int
    @cypher(statement: "MATCH (this)-[:WROTE]->(r:Review) RETURN COUNT(r)")
}

type Business {
  id: ID!
  name: String
  address: String
  city: String
  state: String
  reviews: [Review] @relation(name: "REVIEWS", direction: "IN")
  categories: [Category] @relation(name: "IN_CATEGORY", direction: "OUT")
}

type Review {
  id: ID!
  stars: Int
  text: String
  date: Date
  business: Business @relation(name: "REVIEWS", direction: "OUT")
  user: User @relation(name: "WROTE", direction: "IN")
}

type Category {
  name: ID!
  businesses: [Business] @relation(name: "IN_CATEGORY", direction: "IN")
}

type Query {
  usersBySubstring(substring: String): [User]
    @cypher(
      statement: "MATCH (u:User) WHERE u.name CONTAINS $substring RETURN u"
    )
}
`

export const resolvers = {
  Query: {
    Users: neo4jgraphql,
    Business: neo4jgraphql,
    Category: neo4jgraphql,
    Review: neo4jgraphql
  }
};

index.js

import { typeDefs, resolvers } from "./graphql-schema";
import { ApolloServer, gql, makeExecutableSchema  } from "apollo-server";
import { v1 as neo4j } from "neo4j-driver";
import { augmentSchema } from "neo4j-graphql-js";
import dotenv from "dotenv";

// set environment variables from ../.env
dotenv.config();



const schema = makeExecutableSchema({
  typeDefs,
  resolvers
});

const augmentedSchema = augmentSchema(schema);

const driver = neo4j.driver(
  process.env.NEO4J_URI || "bolt://localhost:7689",
  neo4j.auth.basic(
    process.env.NEO4J_USER || "neo4j",
    process.env.NEO4J_PASSWORD || "letmein"
  )
);


const server = new ApolloServer({
  context: { driver },
  schema: augmentedSchema
});

server.listen(process.env.GRAPHQL_LISTEN_PORT, "0.0.0.0").then(({ url }) => {
  console.log(`GraphQL API ready at ${url}`);
});

谁能帮忙解决这个问题！提前致谢

Answer 1

如 docs

中所述

NOTE: Only use augmentSchema if you are working with an existing GraphQLSchema object. In most cases you should use makeAugmentedSchema which can construct the GraphQLSchema object from type definitions.

发生此错误是因为您正试图使用 makeExecutableSchema 创建您的架构。 @relation 和 @cypher 指令仅由 neo4j-graphql 使用。由于它们实际上并未定义为架构的一部分，因此使用 makeExecutableSchema 构建架构将导致错误，就像使用任何其他未定义的指令一样。

您应该只使用 makeAugmentedSchema 来代替：

const schema = makeAugmentedSchema({
  typeDefs,
  resolvers,
})
const driver = /* ... */
const server = new ApolloServer({
  context: { driver },
  schema,
})

Error: Unknown directive "relation". with Grand-stack of neo4j

Error: Unknown directive "relation". with Grand-stack of neo4j

neo4j

graphql

grandstack