From cc20165a7aff5272b3690198917ffeb797c32c9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandbox=20=F0=9F=A4=96?= <neo4j-oss-build@neotechnology.com>
Date: 2020年12月22日 10:31:59 +0000
Subject: [PATCH] Updating sandbox graph-data-science
---
 code/graphql/example.js &#124; 57 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 code/graphql/example.js
diff --git a/code/graphql/example.js b/code/graphql/example.js
new file mode 100644
index 0000000..6ca867b
--- /dev/null
+++ b/code/graphql/example.js
@@ -0,0 +1,57 @@
+const { makeAugmentedSchema, inferSchema } = require("neo4j-graphql-js");
+const { ApolloServer } = require("apollo-server");
+const neo4j = require("neo4j-driver");
+
+const main = async () => {
+ // Create Neo4j driver instance
+ const driver = neo4j.driver(
+ "bolt://<host>:<boltport>",
+ neo4j.auth.basic("<username>", "<password>")
+ );
+
+ let typeDefs;
+ // GraphQL type definitions can be inferred from existing database or
+ // specified explicitly. Uncomment the lines below to specify typedefs explicitly
+ // otherwise typedefs will be inferred from existing database
+ //typeDefs = /* GraphQL */ `
+ //type Person {
+ // name: String
+ // knows: [Person] @relation(name: "KNOWS", direction: "OUT")
+ // friendCount: Int @cypher(statement:"RETURN SIZE( (this)-[:KNOWS]->(:Person))")
+ //}
+ //`;
+
+ const getInferredTypes = async (driver) => {
+ const schemaInferenceOptions = {
+ alwaysIncludeRelationships: false,
+ };
+
+ const results = await inferSchema(driver, schemaInferenceOptions);
+ return results.typeDefs;
+ };
+
+ if (!typeDefs) {
+ typeDefs = await getInferredTypes(driver);
+ }
+
+ // Create executable GraphQL schema from GraphQL type definitions,
+ // using neo4j-graphql.js to autogenerate resolvers
+ const schema = makeAugmentedSchema({
+ typeDefs,
+ });
+
+ // Create ApolloServer instance to serve GraphQL schema
+ // Inject Neo4j driver instance into the context object
+ // which is passed into each (autogenerated) resolver
+ const server = new ApolloServer({
+ context: { driver },
+ schema,
+ });
+
+ // Start ApolloServer
+ server.listen().then(({ url }) => {
+ console.log(`GraphQL server ready at ${url}`);
+ });
+};
+
+main();
\ No newline at end of file
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