nest with db connection and sample exec of db objects

This commit is contained in:
Kallesh B S 2025-02-24 10:32:41 +05:30
commit 89ca063292
25 changed files with 14622 additions and 0 deletions

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# compiled output
/dist
/node_modules
/build
# Logs
logs
*.log
npm-debug.log*
pnpm-debug.log*
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yarn-error.log*
lerna-debug.log*
# OS
.DS_Store
# Tests
/coverage
/.nyc_output
# IDEs and editors
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.c9/
*.launch
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*.sublime-workspace
# IDE - VSCode
.vscode/*
!.vscode/settings.json
!.vscode/tasks.json
!.vscode/launch.json
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# dotenv environment variable files
.env
.env.development.local
.env.test.local
.env.production.local
.env.local
# temp directory
.temp
.tmp
# Runtime data
pids
*.pid
*.seed
*.pid.lock
# Diagnostic reports (https://nodejs.org/api/report.html)
report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json

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{
"singleQuote": true,
"trailingComma": "all"
}

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<p align="center">
<a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="120" alt="Nest Logo" /></a>
</p>
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<p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
<p align="center">
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## Description
[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
## Project setup
```bash
$ npm install
```
## Compile and run the project
```bash
# development
$ npm run start
# watch mode
$ npm run start:dev
# production mode
$ npm run start:prod
```
## Run tests
```bash
# unit tests
$ npm run test
# e2e tests
$ npm run test:e2e
# test coverage
$ npm run test:cov
```
## Deployment
When you're ready to deploy your NestJS application to production, there are some key steps you can take to ensure it runs as efficiently as possible. Check out the [deployment documentation](https://docs.nestjs.com/deployment) for more information.
If you are looking for a cloud-based platform to deploy your NestJS application, check out [Mau](https://mau.nestjs.com), our official platform for deploying NestJS applications on AWS. Mau makes deployment straightforward and fast, requiring just a few simple steps:
```bash
$ npm install -g mau
$ mau deploy
```
With Mau, you can deploy your application in just a few clicks, allowing you to focus on building features rather than managing infrastructure.
## Resources
Check out a few resources that may come in handy when working with NestJS:
- Visit the [NestJS Documentation](https://docs.nestjs.com) to learn more about the framework.
- For questions and support, please visit our [Discord channel](https://discord.gg/G7Qnnhy).
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## Support
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## Stay in touch
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- Website - [https://nestjs.com](https://nestjs.com/)
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## License
Nest is [MIT licensed](https://github.com/nestjs/nest/blob/master/LICENSE).

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// @ts-check
import eslint from '@eslint/js';
import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
import globals from 'globals';
import tseslint from 'typescript-eslint';
export default tseslint.config(
{
ignores: ['eslint.config.mjs'],
},
eslint.configs.recommended,
...tseslint.configs.recommendedTypeChecked,
eslintPluginPrettierRecommended,
{
languageOptions: {
globals: {
...globals.node,
...globals.jest,
},
ecmaVersion: 5,
sourceType: 'module',
parserOptions: {
projectService: true,
tsconfigRootDir: import.meta.dirname,
},
},
},
{
rules: {
'@typescript-eslint/no-explicit-any': 'off',
'@typescript-eslint/no-floating-promises': 'warn',
'@typescript-eslint/no-unsafe-argument': 'warn'
},
},
);

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{
"$schema": "https://json.schemastore.org/nest-cli",
"collection": "@nestjs/schematics",
"sourceRoot": "src",
"compilerOptions": {
"deleteOutDir": true
}
}

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import { DataSourceOptions } from 'typeorm';
export const OracleConfig: DataSourceOptions = {
type: 'oracle',
username: 'system',
password: 'root',
connectString: '192.168.1.96/xe',
// entities: [__dirname + '/**/*.entity{.ts,.js}'],
synchronize: true,
};
export const MssqlConfig: DataSourceOptions = {
type: 'mssql',
host: 'localhost',
port: 1433,
username: 'mssql1433',
password: 'root',
database: 'demo',
// entities: [__dirname + '/**/*.entity{.ts,.js}'],
synchronize: true,
options: {
enableArithAbort: true,
trustServerCertificate: true,
},
};
export const MysqlConfig: DataSourceOptions = {
type: 'mysql',
host: 'localhost',
port: 3306,
username: 'root',
password: 'root',
database: 'demo',
// entities: [__dirname + '/**/*.entity{.ts,.js}'],
synchronize: true,
};

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{
"name": "test",
"version": "0.0.1",
"description": "",
"author": "",
"private": true,
"license": "UNLICENSED",
"scripts": {
"build": "nest build",
"format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
"start": "nest start",
"start:dev": "nest start --watch",
"start:debug": "nest start --debug --watch",
"start:prod": "node dist/main",
"lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
"test": "jest",
"test:watch": "jest --watch",
"test:cov": "jest --coverage",
"test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
"test:e2e": "jest --config ./test/jest-e2e.json"
},
"dependencies": {
"@nestjs/common": "^11.0.1",
"@nestjs/core": "^11.0.1",
"@nestjs/platform-express": "^11.0.1",
"@nestjs/typeorm": "^11.0.0",
"mssql": "^10.0.4",
"mysql2": "^3.12.0",
"oracledb": "^6.7.2",
"pg": "^8.13.3",
"reflect-metadata": "^0.2.2",
"rxjs": "^7.8.1",
"typeorm": "^0.3.20"
},
"devDependencies": {
"@eslint/eslintrc": "^3.2.0",
"@eslint/js": "^9.18.0",
"@nestjs/cli": "^11.0.0",
"@nestjs/schematics": "^11.0.0",
"@nestjs/testing": "^11.0.1",
"@swc/cli": "^0.6.0",
"@swc/core": "^1.10.7",
"@types/express": "^5.0.0",
"@types/jest": "^29.5.14",
"@types/node": "^22.10.7",
"@types/oracledb": "^6.5.3",
"@types/supertest": "^6.0.2",
"eslint": "^9.18.0",
"eslint-config-prettier": "^10.0.1",
"eslint-plugin-prettier": "^5.2.2",
"globals": "^15.14.0",
"jest": "^29.7.0",
"prettier": "^3.4.2",
"source-map-support": "^0.5.21",
"supertest": "^7.0.0",
"ts-jest": "^29.2.5",
"ts-loader": "^9.5.2",
"ts-node": "^10.9.2",
"tsconfig-paths": "^4.2.0",
"typescript": "^5.7.3",
"typescript-eslint": "^8.20.0"
},
"jest": {
"moduleFileExtensions": [
"js",
"json",
"ts"
],
"rootDir": "src",
"testRegex": ".*\\.spec\\.ts$",
"transform": {
"^.+\\.(t|j)s$": "ts-jest"
},
"collectCoverageFrom": [
"**/*.(t|j)s"
],
"coverageDirectory": "../coverage",
"testEnvironment": "node"
}
}

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import { Test, TestingModule } from '@nestjs/testing';
import { AppController } from './app.controller';
import { AppService } from './app.service';
describe('AppController', () => {
let appController: AppController;
beforeEach(async () => {
const app: TestingModule = await Test.createTestingModule({
controllers: [AppController],
providers: [AppService],
}).compile();
appController = app.get<AppController>(AppController);
});
describe('root', () => {
it('should return "Hello World!"', () => {
expect(appController.getHello()).toBe('Hello World!');
});
});
});

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import { Controller, Get } from '@nestjs/common';
import { AppService } from './app.service';
@Controller()
export class AppController {
constructor(private readonly appService: AppService) {}
@Get()
getHello(): string {
return this.appService.getHello();
}
}

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import { Module } from '@nestjs/common';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { DbModule } from './db/db.module';
import { OracleSpModule } from './oraclesp/oraclesp.module';
@Module({
imports: [DbModule, OracleSpModule],
controllers: [AppController],
providers: [AppService],
})
export class AppModule {}

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import { Injectable } from '@nestjs/common';
@Injectable()
export class AppService {
getHello(): string {
return 'Hello World!';
}
}

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import { Test, TestingModule } from '@nestjs/testing';
import { DbController } from './db.controller';
describe('DbController', () => {
let controller: DbController;
beforeEach(async () => {
const module: TestingModule = await Test.createTestingModule({
controllers: [DbController],
}).compile();
controller = module.get<DbController>(DbController);
});
it('should be defined', () => {
expect(controller).toBeDefined();
});
});

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import { Controller, Get, Param } from '@nestjs/common';
import { DbService } from './db.service';
@Controller('db')
export class DbController {
constructor(private readonly dbService: DbService) { }
@Get('/getConn/:type')
async getConn(@Param('type') type: string) {
try {
const dataSource = this.dbService.getDataSource();
if (dataSource) {
return 'Connection successfull1';
}
else {
await this.dbService.initialize(this.dbService.getDbTypeConfig(type))
const conn = this.dbService.getDataSource();
if(conn){
return "Connection successfull2";
}
else{
throw new Error('Error while connecting to db..!')
}
}
}
catch (err) {
console.log(err);
}
}
@Get('/closeConn')
closeConn() {
try {
const dataSource = this.dbService.getDataSource();
if (dataSource) {
return this.dbService.closeConnection();
}
}
catch (err) {
return "No Connection Detected to close";
}
}
}

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import { Module } from '@nestjs/common';
import { DbService } from './db.service';
import { DbController } from './db.controller';
@Module({
providers: [DbService],
controllers: [DbController],
exports:[DbService]
})
export class DbModule {}

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import { Test, TestingModule } from '@nestjs/testing';
import { DbService } from './db.service';
describe('DbService', () => {
let service: DbService;
beforeEach(async () => {
const module: TestingModule = await Test.createTestingModule({
providers: [DbService],
}).compile();
service = module.get<DbService>(DbService);
});
it('should be defined', () => {
expect(service).toBeDefined();
});
});

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import { Injectable } from '@nestjs/common';
import { MssqlConfig, MysqlConfig, OracleConfig } from 'ormconfig';
import { DataSource, DataSourceOptions } from 'typeorm';
import * as oracledb from 'oracledb';
@Injectable()
export class DbService {
private dataSource: DataSource | null = null;
private oracleConnection: oracledb.Connection | null = null;
constructor() {}
async initialize(options: DataSourceOptions) {
if (options.type === 'oracle') {
this.oracleConnection = await oracledb.getConnection(options);
} else {
this.dataSource = new DataSource({
...options,
});
await this.dataSource.initialize();
console.log('Data Source has been initialized!');
}
}
getDataSource(): DataSource | oracledb.Connection | null {
if (this.oracleConnection) {
return this.oracleConnection; // Return the Oracle connection
}
return this.dataSource; // Return the TypeORM DataSource
}
getDbTypeConfig(type?: string): DataSourceOptions {
if (type === 'oracle') return OracleConfig;
else return MssqlConfig;
}
async closeConnection() {
if (this.oracleConnection) {
try {
await this.oracleConnection.close(); // Close Oracle connection
console.log('Oracle connection has been closed!');
} catch (err) {
console.error('Error closing Oracle connection:', err);
}
this.oracleConnection = null;
} else if (this.dataSource) {
await this.dataSource.destroy();
console.log('Data Source has been closed!');
this.dataSource = null;
} else {
console.log('Data Source is not initialized.');
}
}
}

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import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
async function bootstrap() {
const app = await NestFactory.create(AppModule);
await app.listen(process.env.PORT ?? 3000);
}
bootstrap();

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import { Controller,Get } from '@nestjs/common';
import { OracleSpService } from './oraclesp.service';
@Controller('oracleSP')
export class OracleSpController {
constructor(private readonly oracleSPService:OracleSpService){}
@Get('/getRegions')
getRegions(){
return this.oracleSPService.getRegions();
}
}

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import { Module } from '@nestjs/common';
import { OracleSpService } from './oraclesp.service';
import { OracleSpController } from './oraclesp.controller';
import { DbModule } from 'src/db/db.module';
@Module({
imports:[DbModule],
providers: [OracleSpService],
controllers: [OracleSpController]
})
export class OracleSpModule {}

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import { Inject, Injectable } from '@nestjs/common';
import { DbService } from 'src/db/db.service';
import * as oracledb from 'oracledb'
@Injectable()
export class OracleSpService {
private dbService: DbService;
constructor(@Inject(DbService) dbService: DbService) {
this.dbService = dbService;
}
async getRegions() {
let connection;
let rows = [];
try {
// Connect to the Oracle database using oracledb
connection = await this.dbService.getDataSource()
if (!connection) {
throw new Error('No DB Connected')
}
const result = await connection.execute(
`BEGIN
sp1(:res);
END;`,
{
res: {
type: oracledb.CURSOR,
dir: oracledb.BIND_OUT
}
},
{
outFormat: oracledb.OUT_FORMAT_OBJECT
}
);
if (result.outBinds && result.outBinds.res) {
const cursor = result.outBinds.res; // The OUT cursor
let rowsBatch;
do {
rowsBatch = await cursor.getRows(100); // Fetch 100 rows at a time
rows = rows.concat(rowsBatch); // Append fetched rows to the main array
} while (rowsBatch.length > 0);
console.log('Rows fetched:', rows);
// Close the cursor after you're done
await cursor.close();
} else {
throw new Error('No cursor returned from the stored procedure');
}
return rows;
} catch (err) {
console.error('Error fetching users: ', err);
throw new Error('Error fetching users');
} finally {
}
}
async InsertRegions() {
let connection;
try {
// Connect to the Oracle database using oracledb
connection = await this.dbService.getDataSource()
if (!connection) {
throw new Error('No DB Connected')
}
const result = await connection.execute(
`BEGIN
sp1(:a,:b,:res);
END;`, {
a: {
val: "03",
type: oracledb.DB_TYPE_VARCHAR
},
b: {
val: 'indu1',
type: oracledb.DB_TYPE_VARCHAR
},
res: {
type: oracledb.CURSOR,
dir: oracledb.BIND_OUT
}
}, {
outFormat: oracledb.OUT_FORMAT_OBJECT
}
);
let fres = await result.outBinds.res.getRows();
return fres
} catch (err) {
console.error('Error fetching users: ', err);
throw new Error('Error fetching users');
} finally {
}
}
async updateRegions() {
let connection;
try {
// Connect to the Oracle database using oracledb
connection = await this.dbService.getDataSource()
if (!connection) {
throw new Error('No DB Connected')
}
const result = await connection.execute(
`BEGIN
sp1(:a,:b,:res);
END;`, {
a: {
val: 3,
type: oracledb.DB_TYPE_NUMBER
},
b: {
val: 'indu1',
type: oracledb.DB_TYPE_VARCHAR
},
res: {
type: oracledb.CURSOR,
dir: oracledb.BIND_OUT
}
}, {
outFormat: oracledb.OUT_FORMAT_OBJECT
}
);
let fres = await result.outBinds.res.getRows();
return fres
} catch (err) {
console.error('Error fetching users: ', err);
throw new Error('Error fetching users');
} finally {
}
}
}

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import { Test, TestingModule } from '@nestjs/testing';
import { INestApplication } from '@nestjs/common';
import * as request from 'supertest';
import { App } from 'supertest/types';
import { AppModule } from './../src/app.module';
describe('AppController (e2e)', () => {
let app: INestApplication<App>;
beforeEach(async () => {
const moduleFixture: TestingModule = await Test.createTestingModule({
imports: [AppModule],
}).compile();
app = moduleFixture.createNestApplication();
await app.init();
});
it('/ (GET)', () => {
return request(app.getHttpServer())
.get('/')
.expect(200)
.expect('Hello World!');
});
});

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{
"moduleFileExtensions": ["js", "json", "ts"],
"rootDir": ".",
"testEnvironment": "node",
"testRegex": ".e2e-spec.ts$",
"transform": {
"^.+\\.(t|j)s$": "ts-jest"
}
}

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{
"extends": "./tsconfig.json",
"exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
}

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{
"compilerOptions": {
"module": "commonjs",
"declaration": true,
"removeComments": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"allowSyntheticDefaultImports": true,
"target": "ES2021",
"sourceMap": true,
"outDir": "./dist",
"baseUrl": "./",
"incremental": true,
"skipLibCheck": true,
"strictNullChecks": true,
"forceConsistentCasingInFileNames": true,
"noImplicitAny": false,
"strictBindCallApply": false,
"noFallthroughCasesInSwitch": false
}
}