neo-for-nest

Nest Neo4j

Neo4j integration for Nest.js

Description

This repository provides Neo4j integration for Nest.

Installation

$ npm i --save neo-for-nest

Quick Start

Register the Neo4j Module in your application using the forRoot method, passing the neo4j connection information as an object:

import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { Neo4jModule, Neo4jModule } from 'neo-for-nest'

@Module({
  imports: [
    Neo4jModule.forRootAsync({
      imports: [ConfigModule],
      useFactory: () => {
        return {
          inject: [ConfigService],
          scheme: 'neo4j',
          host: 'localhost',
          port: 7687,
          username: 'neo4j',
          password: 'neo4j',
          //password: 'l1Ohm2LXEKWb0pKzKWWhLSO-lKfBu0s5kOBvdxIaq00',
        } as Neo4jConfig;
      },
    }),
  ],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

Querying Neo4j

The neo-for-nest is @Injectable, so can be passed into any constructor:

import { Neo4jService } from 'neo-for-nest'

@Controller()
export class AppController {
  constructor(private readonly appService: AppService,
    private readonly neo4jService: Neo4jService
    ) {}

  @Get()
  async getHello(): Promise<any> {
    const res = await this.neo4jService.read(`MATCH (n) RETURN count(n) AS count`)

    return `There are ${res.records[0].get('count')} nodes in the database`
  }
}

Methods

getConfig(): Neo4jConfig;
getReadSession(database?: string): Session;
getWriteSession(database?: string): Session;
read(query: string, params?: object, database?: string): Result;
write(query: string, params?: object, database?: string): Result;

Thanks

https://github.com/adam-cowley/nest-neo4j