Merge pull request #223 from moxious/master

Create typedefs automatically by inferring GraphQL Schema from Neo4j

Author: johnymontana

example/apollo-server/movies.js

@@ -2,6 +2,7 @@ import { augmentTypeDefs, augmentSchema } from '../../src/index';
 import { ApolloServer, gql, makeExecutableSchema } from 'apollo-server';
 import { v1 as neo4j } from 'neo4j-driver';
 import { typeDefs, resolvers } from './movies-schema';
+import { inferSchema } from '../../src/inferSchema';
 
 const schema = makeExecutableSchema({
   typeDefs: augmentTypeDefs(typeDefs),
@@ -22,6 +23,12 @@ const driver = neo4j.driver(
   )
 );
 
+inferSchema(driver)
+  .then(result => {
+    console.log(result);
+  })
+  .catch(err => console.error(err));
+
 const server = new ApolloServer({
   schema: augmentedSchema,
   // inject the request object into the context to support middleware

example/autogenerated/autogen-middleware.js

@@ -0,0 +1,50 @@
+import { makeAugmentedSchema } from '../../src/index';
+import { ApolloServer } from 'apollo-server-express';
+import express from 'express';
+import bodyParser from 'body-parser';
+import { v1 as neo4j } from 'neo4j-driver';
+import { typeDefs, resolvers } from './movies-schema';
+
+const schema = makeAugmentedSchema({
+  typeDefs,
+  resolvers,
+  resolverValidationOptions: {
+    requireResolversForResolveType: false
+  }
+});
+
+// Add auto-generated mutations
+//const augmentedSchema = augmentSchema(schema);
+
+const driver = neo4j.driver(
+  process.env.NEO4J_URI || 'bolt://localhost:7687',
+  neo4j.auth.basic(
+    process.env.NEO4J_USER || 'neo4j',
+    process.env.NEO4J_PASSWORD || 'letmein'
+  )
+);
+
+const app = express();
+app.use(bodyParser.json());
+
+const checkErrorHeaderMiddleware = async (req, res, next) => {
+  req.error = req.headers['x-error'];
+  next();
+};
+
+app.use('*', checkErrorHeaderMiddleware);
+
+const server = new ApolloServer({
+  schema,
+  // inject the request object into the context to support middleware
+  // inject the Neo4j driver instance to handle database call
+  context: ({ req }) => {
+    return {
+      driver,
+      req
+    };
+  }
+});
+
+server.applyMiddleware({ app, path: '/' });
+app.listen(3000, '0.0.0.0');

example/autogenerated/autogen.js

@@ -0,0 +1,50 @@
+import { makeAugmentedSchema } from '../../src/index';
+import { ApolloServer } from 'apollo-server';
+import { v1 as neo4j } from 'neo4j-driver';
+import { inferSchema } from '../../src/inferSchema';
+
+const driver = neo4j.driver(
+  process.env.NEO4J_URI || 'bolt://localhost:7687',
+  neo4j.auth.basic(
+    process.env.NEO4J_USER || 'neo4j',
+    process.env.NEO4J_PASSWORD || 'letmein'
+  )
+);
+
+const schemaInferenceOptions = {
+  alwaysIncludeRelationships: false
+};
+
+const inferAugmentedSchema = driver => {
+  return inferSchema(driver, schemaInferenceOptions).then(result => {
+    console.log('TYPEDEFS:');
+    console.log(result.typeDefs);
+
+    return makeAugmentedSchema({
+      typeDefs: result.typeDefs
+    });
+  });
+};
+
+const createServer = augmentedSchema =>
+  new ApolloServer({
+    schema: augmentedSchema,
+    // inject the request object into the context to support middleware
+    // inject the Neo4j driver instance to handle database call
+    context: ({ req }) => {
+      return {
+        driver,
+        req
+      };
+    }
+  });
+
+const port = process.env.GRAPHQL_LISTEN_PORT || 3000;
+
+inferAugmentedSchema(driver)
+  .then(createServer)
+  .then(server => server.listen(port, '0.0.0.0'))
+  .then(({ url }) => {
+    console.log(`GraphQL API ready at ${url}`);
+  })
+  .catch(err => console.error(err));