{"id":47640,"date":"2023-09-18T21:24:15","date_gmt":"2023-01-22T13:24:21","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90graphql%e3%80%91%e5%9c%a830%e5%88%86%e9%92%9f%e5%86%85%e5%bc%80%e5%8f%91%e4%ba%86%e5%8f%af%e4%bb%a5%e4%b8%8eneo4j%e8%bf%9b%e8%a1%8c%e4%ba%a4%e4%ba%92%e7%9a%84graphql%e3%80%82\/"},"modified":"2024-05-04T00:24:27","modified_gmt":"2024-05-03T16:24:27","slug":"%e3%80%90graphql%e3%80%91%e5%9c%a830%e5%88%86%e9%92%9f%e5%86%85%e5%bc%80%e5%8f%91%e4%ba%86%e5%8f%af%e4%bb%a5%e4%b8%8eneo4j%e8%bf%9b%e8%a1%8c%e4%ba%a4%e4%ba%92%e7%9a%84graphql%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90graphql%e3%80%91%e5%9c%a830%e5%88%86%e9%92%9f%e5%86%85%e5%bc%80%e5%8f%91%e4%ba%86%e5%8f%af%e4%bb%a5%e4%b8%8eneo4j%e8%bf%9b%e8%a1%8c%e4%ba%a4%e4%ba%92%e7%9a%84graphql%e3%80%82\/","title":{"rendered":"\u3010GraphQL\u3011\u572830\u5206\u949f\u5185\u5f00\u53d1\u4e86\u53ef\u4ee5\u4e0eNeo4j\u8fdb\u884c\u4ea4\u4e92\u7684GraphQL"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u5728\u4e2d\u6587\u4e2d\uff0c\u6211\u5011\u7d93\u5e38\u770b\u5230\u95dc\u65bcGraphQL\u91dd\u5c0d\u8457\u540d\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\uff08\u5982MySQL\uff09\u7684\u89e3\u8aaa\uff0c\u4f46\u91dd\u5c0d\u5716\u5f62\u8cc7\u6599\u5eab\u7684\u6587\u7ae0\u76f8\u5c0d\u8f03\u5c11\u3002\u9019\u6b21\u6211\u5011\u5c07\u4ee5Node.js\u70ba\u4f8b\uff0c\u572830\u5206\u9418\u5167\u5be6\u73fe\u4f7f\u7528GraphQL\u64cd\u7e31Neo4j\u7684\u7a0b\u5f0f\u3002<\/p>\n

\u5047\u8bbe\u60a8\u4e86\u89e3Neo4j\u548cGraphQL\u662f\u4ec0\u4e48\uff0c\u4e0b\u9762\u5c06\u8fdb\u884c\u89e3\u91ca\uff0c\u8bf7\u5148\u4f7f\u7528\u8c37\u6b4c\u641c\u7d22\u5f15\u64ce\u4e86\u89e3\u4e00\u4e0b\u3002<\/p>\n

\u203bNeo4j\u662f\u6700\u53d7\u6b22\u8fce\u7684\u5f00\u6e90\u56fe\u5f62\u6570\u636e\u5e93\u3002<\/p>\n

\u8bf7\u89e3\u91ca\u6761\u4ef6\u3002<\/h1>\n

\u6211\u80fd\u591f\u5728\u672c\u5730\u73af\u5883\u4e2d\u8fd0\u884cNeo4j\u3002\u6211\u4e86\u89e3GraphQL\u548cNeo4j\u7684\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n

\u6253\u9020\u73af\u5883<\/h1>\n

\u5728Neo4j\u4e2d\u5f15\u5165APOC\u63d2\u4ef6\u3002<\/h3>\n

APOC\u662fNeo4j\u7684\u6269\u5c55\u5e93\uff0c\u5b83\u589e\u52a0\u4e86\u5728Cypher\u4e2d\u53ef\u7528\u7684\u8868\u8fbe\u5f0f\u3002\u5b83\u7528\u4e8e\u5728\u4f7f\u7528GraphQL\u66f4\u65b0\u6570\u636e\u65f6\u3002<\/p>\n

\u5728Neo4j\u5b98\u65b9\u7f51\u7ad9\u4e0a\u6709\u5173\u4e8e\u5982\u4f55\u5b89\u88c5\u7684\u8bf4\u660e\u3002
\nAPOC\u7528\u6237\u6307\u53573.4.0.4<\/p>\n

\u5b66\u4e60\u5e76\u638c\u63e1ES6\u4f7f\u60a8\u80fd\u591f\u6d41\u5229\u5730\u7f16\u5199Javascript\u3002<\/h3>\n

\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aneo4j-graphql-sample\u7684\u6587\u4ef6\u5939\u3002<\/p>\n

\u4e3a\u4e86\u5c06import\u7b49ES6\u7684Javascript\u4ee3\u7801\u8f6c\u8bd1\u6210\u53ef\u5728Node.js\u4e2d\u6267\u884c\u7684\u4ee3\u7801\uff0c\u6211\u4eec\u9700\u8981\u5f15\u5165babel\u3002<\/p>\n

\u8bf7\u8be6\u7ec6\u9605\u8bfb\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n

$ <\/span>mkdir <\/span>neo4j-graphql-sample\r\n$ <\/span>cd <\/span>neo4j-graphql-sample\r\n$ <\/span>npm init -y<\/span>\r\n$ <\/span>npm install<\/span> --save-dev<\/span> babel-cli babel-preset-env\r\n<\/code><\/pre>\n
\u521b\u5efa .babelrc \u6587\u4ef6\u3002<\/p>\n
{<\/span>\r\n  \"presets\"<\/span>:<\/span> [<\/span>\r\n    [<\/span>\r\n      \"env\"<\/span>,<\/span> {<\/span>\r\n        \"targets\"<\/span>:<\/span> {<\/span>\r\n            \"node\"<\/span>:<\/span> \"current\"<\/span>\r\n        }<\/span>\r\n      }<\/span>\r\n    ]<\/span>\r\n  ]<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u66f4\u6539 package.json \u6587\u4ef6\u3002<\/p>\n
{<\/span>\r\n  ...<\/span>\r\n  \"scripts\"<\/span>:<\/span> {<\/span>\r\n    \"start\"<\/span>:<\/span> \"babel-node index.js\"<\/span>\r\n  },<\/span>\r\n  ...<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b89\u88c5GraphQL\u5b9e\u73b0\u6240\u9700\u7684\u5e93\u3002<\/h3>\n
\u4f7f\u7528Apollo\u8fd9\u4e2a\u5e93\u6765\u5b9e\u73b0GraphQL\u3002
\n\u901a\u8fc7\u4f7f\u7528Apollo\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06GraphQL\u670d\u52a1\u5668\u4e0e\u524d\u7aef\u8fde\u63a5\u8d77\u6765\u3002\u73b0\u5728\uff0c\u8ba8\u8bbaGraphQL\u5b9e\u73b0\u5b9e\u9645\u4e0a\u5df2\u7ecf\u53d8\u6210\u8ba8\u8bbaApollo\u670d\u52a1\u5668\u5b9e\u73b0\u7684\u8bdd\u9898\uff0c\u56e0\u4e3a\u5b83\u662f\u5982\u6b64\u53d7\u6b22\u8fce\u7684\u5e93\u3002<\/p>\n
\u53e6\u5916\uff0c\u4e3a\u4e86\u64cd\u4f5cneo4j\uff0c\u6211\u4eec\u5c06\u4f7f\u7528neo4j-driver\u548cneo4j-graphql-js\u8fd9\u4e24\u4e2a\u5de5\u5177\u3002<\/p>\n
$ <\/span>npm install<\/span> --save<\/span> apollo-server-express \\<\/span>\r\napollo-errors \\<\/span>\r\nexpress \\<\/span>\r\ncors \\<\/span>\r\ngraphql \\<\/span>\r\ngraphql-tag \\<\/span>\r\ngraphql-tools \\<\/span>\r\nneo4j-driver \\<\/span>\r\nneo4j-graphql-js\r\n<\/code><\/pre>\n
\u521b\u5efaGraphQL<\/h1>\n
\u5728\u5b9e\u73b0GraphQL\u65f6\u7684\u8981\u70b9\u662f\uff0c\u9996\u5148\u5b9a\u4e49\u67e5\u8be2\u7684\u7c7b\u578b\u6a21\u5f0f(schema)\uff0c\u7136\u540e\u521b\u5efa\u8fd4\u56de\u6570\u636e\u7684\u89e3\u6790\u5668(resolver)\uff0c\u5e76\u51c6\u5907\u7528\u4e8e\u4e0eNeo4j\u8fdb\u884c\u6570\u636e\u4ea4\u4e92\u7684\u9a71\u52a8\u7a0b\u5e8f\uff0c\u5e76\u5c06\u5176\u914d\u7f6e\u5230Apollo\u670d\u52a1\u5668\u4e2d\u3002<\/p>\n
Apollo\u670d\u52a1\u5668\u5c06\u4f7f\u7528express\u8fdb\u884c\u6784\u5efa\u3002<\/p>\n
\u90a3\u4e48\uff0c\u6211\u4eec\u6765\u521b\u5efaindex.js\u5e76\u5f00\u59cb\u7f16\u5199\u5b9e\u9645\u7684\u4ee3\u7801\u3002<\/p>\n
import<\/span> {<\/span> makeAugmentedSchema<\/span> }<\/span> from<\/span> '<\/span>neo4j-graphql-js<\/span>'<\/span>\r\nimport<\/span> {<\/span> ApolloServer<\/span> }<\/span> from<\/span> '<\/span>apollo-server-express<\/span>'<\/span>\r\nimport<\/span> express<\/span> from<\/span> '<\/span>express<\/span>'<\/span>\r\nimport<\/span> bodyParser<\/span> from<\/span> '<\/span>body-parser<\/span>'<\/span>\r\nimport<\/span> cors<\/span> from<\/span> '<\/span>cors<\/span>'<\/span>\r\nimport<\/span> {<\/span> v1<\/span> as<\/span> neo4j<\/span> }<\/span> from<\/span> '<\/span>neo4j-driver<\/span>'<\/span>\r\nimport<\/span> {<\/span> typeDefs<\/span>,<\/span> resolvers<\/span> }<\/span> from<\/span> '<\/span>.\/schema<\/span>'<\/span>\r\n\r\n\/\/ \u30b9\u30ad\u30fc\u30de\u306e\u4f5c\u6210<\/span>\r\n\/\/ typeDefs\u306bQuery\u3068Mutation\u306e\u578b\u3092\u5b9a\u7fa9\u3059\u308b<\/span>\r\nconst<\/span> schema<\/span> =<\/span> makeAugmentedSchema<\/span>({<\/span>\r\n  typeDefs<\/span>,<\/span>\r\n  config<\/span>:<\/span> {<\/span>\r\n    query<\/span>:<\/span> true<\/span>,<\/span>\r\n    mutation<\/span>:<\/span> false<\/span>\r\n  }<\/span>\r\n})<\/span>\r\n\r\nconst<\/span> neo4jUri<\/span> =<\/span> process<\/span>.<\/span>env<\/span>.<\/span>NEO4J_URI<\/span> ||<\/span> '<\/span>bolt:\/\/localhost:7687<\/span>'<\/span>\r\nconst<\/span> neo4jUser<\/span> =<\/span> process<\/span>.<\/span>env<\/span>.<\/span>NEO4J_USER<\/span> ||<\/span> '<\/span>neo4j<\/span>'<\/span>\r\nconst<\/span> neo4jPassword<\/span> =<\/span> process<\/span>.<\/span>env<\/span>.<\/span>NEO4J_PASSWORD<\/span> ||<\/span> '<\/span>neo4j<\/span>'<\/span>\r\n\r\n\/\/ \u30c9\u30e9\u30a4\u30d0\u30fc\u306e\u4f5c\u6210<\/span>\r\nconst<\/span> driver<\/span> =<\/span> neo4j<\/span>.<\/span>driver<\/span>(<\/span>neo4jUri<\/span>,<\/span> neo4j<\/span>.<\/span>auth<\/span>.<\/span>basic<\/span>(<\/span>neo4jUser<\/span>,<\/span> neo4jPassword<\/span>))<\/span>\r\n\r\n\/\/ express\u30b5\u30fc\u30d0\u30fc\u306e\u4f5c\u6210<\/span>\r\nconst<\/span> app<\/span> =<\/span> express<\/span>()<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>bodyParser<\/span>.<\/span>json<\/span>())<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>cors<\/span>())<\/span>\r\n\r\nconst<\/span> playgroundEndpoint<\/span> =<\/span> '<\/span>\/graphql<\/span>'<\/span>\r\n\r\n\/\/ Apollo\u30b5\u30fc\u30d0\u30fc\u306e\u4f5c\u6210<\/span>\r\n\/\/ playground\u306f\u8a66\u3057\u306b\u30af\u30a8\u30ea\u3092\u6d41\u305b\u308b\u30a8\u30c7\u30a3\u30bf\u3001\u5f8c\u3067\u4f7f\u7528\u3059\u308b<\/span>\r\nconst<\/span> server<\/span> =<\/span> new<\/span> ApolloServer<\/span>({<\/span>\r\n  schema<\/span>,<\/span>\r\n  resolvers<\/span>,<\/span>\r\n  context<\/span>:<\/span> ({<\/span> req<\/span> })<\/span> =><\/span> {<\/span>\r\n    return<\/span> {<\/span>\r\n      driver<\/span>,<\/span>\r\n      req<\/span>,<\/span>\r\n    }<\/span>\r\n  },<\/span>\r\n  introspection<\/span>:<\/span> true<\/span>,<\/span>\r\n  playground<\/span>:<\/span> {<\/span>\r\n    endpoint<\/span>:<\/span> playgroundEndpoint<\/span>,<\/span>\r\n    settings<\/span>:<\/span> {<\/span>\r\n      '<\/span>editor.theme<\/span>'<\/span>:<\/span> '<\/span>light<\/span>'<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n})<\/span>\r\n\r\n\/\/ express\u3068apollo\u30b5\u30fc\u30d0\u30fc\u3092\u7e4b\u3052\u308b<\/span>\r\nserver<\/span>.<\/span>applyMiddleware<\/span>({<\/span> app<\/span>,<\/span> path<\/span>:<\/span> '<\/span>\/<\/span>'<\/span> })<\/span>\r\n\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>`http:\/\/localhost:4000\/graphql`<\/span>)<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
\u6211\u5c06\u521b\u5efa\u4e00\u4e2aschema.js\u6587\u4ef6\u3002<\/p>\n
\u5728schema.js\u4e2d\u5b9a\u4e49\u4e86\u6a21\u5f0f\u7684\u7c7b\u578b\u548c\u89e3\u6790\u5668\u3002<\/p>\n
\u5728\u6a21\u5f0f\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528@relation\u548c@cypher\u6307\u4ee4\u3002@relation\u53ef\u4ee5\u5b9a\u4e49Neo4j\u8282\u70b9\u4e4b\u95f4\u7684\u8fb9\u7f18\u8fde\u63a5\uff0c\u800c@cypher\u53ef\u4ee5\u76f4\u63a5\u5728Neo4j\u4e2d\u6267\u884cCypher\u67e5\u8be2\u3002<\/p>\n
\u4f7f\u7528Resolver\u6839\u636e\u6a21\u5f0f\u521b\u5efa\u8fd4\u56de\u6570\u636e\u3002
\n\u901a\u8fc7\u4f7f\u7528neo4jgraphql\uff0cResolver\u5c06\u81ea\u52a8\u5224\u65ad\u662fQuery\u8fd8\u662fMutation\uff0c\u5e76\u5728\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u540e\u521b\u5efa\u8fd4\u56de\u6570\u636e\u3002<\/p>\n
\u9019\u6b21\u6211\u5011\u5c07\u6dfb\u52a0\u300cUser\u300d\u548c\u300cArticle\u300d\u4f5c\u70ba\u7bc0\u9ede\uff0c\u4e26\u6dfb\u52a0\u300cWRITE\u300d\u4f5c\u70ba\u908a\uff0c\u5275\u5efa\u53ef\u4ee5\u67e5\u8a62\u548c\u4fee\u6539\u7684\u578b\u5225\u3002<\/p>\n
import<\/span> {<\/span> neo4jgraphql<\/span> }<\/span> from<\/span> '<\/span>neo4j-graphql-js<\/span>'<\/span>\r\n\r\nexport<\/span> const<\/span> typeDefs<\/span> =<\/span> `\r\n  type Article {\r\n    _id: ID\r\n    uuid: ID!\r\n    title: String!\r\n    description: String!\r\n    created_at: Date!\r\n    write_user: User @relation(name: \"WRITE\", direction: \"IN\")\r\n  }\r\n\r\n  type User {\r\n    _id: ID\r\n    uuid: ID!\r\n    name: String!\r\n    created_at: Date!\r\n    write_articles: [Article] @relation(name: \"WRITE\", direction: \"OUT\")\r\n  }\r\n\r\n  type Query {\r\n    Article(_id: ID, title: String, description: String, created_at: Date): [Article]\r\n    User(_id: ID, uid: ID, name: String, avatar: String, created_at: Int): [User]\r\n  }\r\n\r\n  type Mutation {\r\n    writeArticle(title: String!, description: String! user_uuid: ID!): Article\r\n      @cypher(statement:\"MATCH (u:User {uuid: $user_uuid}) MERGE (u)-[r:WRITE]->(n:Article {uuid: apoc.create.uuid(), title: $title, description: $description, created_at: apoc.date.format(apoc.date.add(timestamp(), 'ms', 9, 'h'), 'ms')}) return n\")\r\n\r\n    createUser(name: String!): User\r\n      @cypher(statement:\"CREATE (n:User {uuid: apoc.create.uuid(), name: $name, created_at: apoc.date.format(apoc.date.add(timestamp(), 'ms', 9, 'h'), 'ms')}) return n\")\r\n  }\r\n`<\/span>\r\n\r\nexport<\/span> const<\/span> resolvers<\/span> =<\/span> {<\/span>\r\n  Query<\/span>:<\/span> {<\/span>\r\n    Article<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span> {<\/span>\r\n      return<\/span> neo4jgraphql<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span>\r\n    },<\/span>\r\n    User<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span> {<\/span>\r\n      return<\/span> neo4jgraphql<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span>\r\n    },<\/span>\r\n  },<\/span>\r\n  Mutation<\/span>:<\/span> {<\/span>\r\n    writeArticle<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span> {<\/span>\r\n      return<\/span> neo4jgraphql<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span>\r\n    },<\/span>\r\n    createUser<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span> {<\/span>\r\n      return<\/span> neo4jgraphql<\/span>(<\/span>obj<\/span>,<\/span> args<\/span>,<\/span> ctx<\/span>,<\/span> info<\/span>)<\/span>\r\n    },<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728Playground\u4e2d\u5c1d\u8bd5\u4f7f\u7528GraphQL\u3002<\/h1>\n
\u8ba9\u6211\u4eec\u542f\u52a8Neo4j\uff0c\u5e76\u4f7f\u7528npm start\u6765\u8fd0\u884c\u521a\u624d\u5b9e\u73b0\u7684Apollo\u670d\u52a1\u5668\u3002<\/p>\n
$ <\/span>npm start\r\n\r\n><\/span> neo4j-graphql-sample@1.0.0 start ~\/neo4j-graphql-sample\r\n><\/span> babel-node index.js\r\n\r\nhttp:\/\/localhost:4000\/graphql\r\n<\/code><\/pre>\n
\u5f53\u6210\u529f\u542f\u52a8Apollo\u670d\u52a1\u5668\u65f6\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95eelocalhost:4000\/graphql\u6765\u6253\u5f00\u4e00\u4e2a\u540d\u4e3aPlayground\u7684\u7f16\u8f91\u5668\uff0c\u4ece\u800c\u5728\u6d4f\u89c8\u5668\u4e0a\u6d4b\u8bd5GraphQL\u67e5\u8be2\u3002<\/p>\n
\u5982\u679c\u4f60\u4e0d\u77e5\u9053\u5982\u4f55\u7f16\u5199GraphQL\u67e5\u8be2\uff0c\u8bf7\u5728\u4e0b\u9762\u7684\u94fe\u63a5\u4e2d\u7b80\u8981\u5b66\u4e60\u3002
\n\u6211\u6574\u7406\u4e86\u5173\u4e8eGraphQL\u67e5\u8be2\u7684\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n
\u8ba9\u6211\u4eec\u5728createUser\u7684Mutation\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684User\u8bd5\u8bd5\u770b\u3002<\/p>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
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