A progressive Node.js framework for building efficient and scalable server-side applications, heavily inspired by Angular.
Nest framework TypeScript starter repository.
Wrapper for csv-parser library
$ npm install nest-csv-parser
# or if you using Yarn
$ yarn add nest-csv-parserAdd nest-csv-parser as a dependency.
import { Module } from '@nestjs/common'
import { CsvModule } from 'nest-csv-parser'
// ...imports of your app dependecies
@Module({
imports: [
CsvModule, // <-- add into imports
...
],
controllers: [ ... ],
providers: [ ... ]
})
export class AppModule {}Parser will create instance of entity for each line in CSV stream.
// app.parser.ts
import { Injectable } from '@nestjs/common'
import { CsvParser } from 'nest-csv-parser'
class Entity {
foo: string
bar: string
}
@Injectable()
export class AppService {
constructor(
private readonly csvParser: CsvParser
) {}
async parse() {
// Create stream from file (or get it from S3)
const stream = fs.createReadStream(__dirname + '/some.csv')
const entities: Entity[] = await csvParser.parse(stream, Entity)
return entities
}
}csvParser.parse(stream, Entity, count, offset, csvConfig) has 5 parameters.
required
First parameter has to be the stream of the CSV file. NodeJS Reference
required
Has to be object from which will parser create instance.
default: null
How many lines you want to parse.
default: null
Offset is similar to SQL databases. Skips the N lines from the beginning of the file.
default
{ strict: true, separator: ';' }Just a configuration object for csv-parser library options you can find here
# clone repository
$ git clone [email protected]:mCzolko/nest-csv-parser.git
$ cd nest-csv-parser
# install dependencies
$ yarn install
# watch mode
$ yarn test:watch# unit tests
$ yarn testMichael Czolko
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