adding-constraints-to-neo4jgraphql

adding-constraints-to-neo4jgraphql.js

const { Neo4jGraphQL } = require("@neo4j/graphql");
const neo4j = require("neo4j-driver");
const { ApolloServer } = require("apollo-server");
const { getResolversFromSchema } = require("@graphql-tools/utils");
const { mergeTypeDefs } = require("@graphql-tools/merge");
const { makeExecutableSchema } = require("@graphql-tools/schema");
const { printSchema } = require("graphql");
const {
  constraintDirective,
  constraintDirectiveTypeDefs,
} = require("graphql-constraint-directive");

const typeDefs = `
  type Movie {
    title: String!
    actors: [Person] @relationship(type: "ACTED_IN", direction: IN)
  }

  type Person {
    name: String 
  }
`;

const driver = neo4j.driver(
  "bolt://localhost:7687",
  neo4j.auth.basic("admin", "password")
);

const neoSchema = new Neo4jGraphQL({
  typeDefs,
  driver,
});

const extendedTypeDefs = `
  extend input MovieCreateInput {
    title: String! @constraint(minLength: 5, format: "email")
  }
`;

const schema = makeExecutableSchema({
  typeDefs: mergeTypeDefs(
    [
      constraintDirectiveTypeDefs,
      printSchema(neoSchema.schema),
      extendedTypeDefs,
    ],
    { ignoreFieldConflicts: true }
  ),
  resolvers: getResolversFromSchema(neoSchema.schema),
  schemaTransforms: [constraintDirective()],
});

const server = new ApolloServer({
  schema,
});

async function main() {
  await server.listen(4000);
  console.log("http://localhost:4000");
}

main();