@dauflo/nest-fixtures
v1.3.1
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A module for making fixtures with NestJS. This package is inspired by Doctrine fixtures.
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NestJS Fixtures
Tired of creating random script to insert data into your database, tired of your coworkers asking you to update the data, this package is made for you!
Nest Fixtures
allow you to turn all your data schemas into fixtures
to populate your database.
Currently this package only works for Mongodb databases.
Installation
Before you get started, you'll have to install a few packages. Obviously you need @dauflo/nest-fixtures
. You'll also need nest-commander
to run your fixtures command.
npm i nest-commander @dauflo/nest-fixtures
How to use
You'll need to create a datafixtures
directory inside src
, this is where you'll write all your fixtures.
A fixtures file could look like this:
// src/datafixtures/cat.fixtures.ts
import { Injectable } from '@nestjs/common'
import { InjectModel } from '@nestjs/mongoose'
import { Model } from 'mongoose'
import { Fixtures } from '@dauflo/nest-fixtures'
import { Cat, CatDocument } from 'src/models/cats/cat.schema'
@Injectable()
export class CatFixtures extends Fixtures {
constructor(@InjectModel(Cat.name) private catModel: Model<CatDocument>) {
super()
}
async load(): Promise<void> {
// do your logic
}
}
Congratz! You have you first fixtures, it's now time to populate your database. To do so, head to you app.module.ts
file and add the following lines.
// src/app.module.ts
import { FixturesCommand, FixturesModule } from '@dauflo/nest-fixtures'
@Module({
imports: [
FixturesModule.forRootAsync(
'src/datafixtures/*.fixtures.ts',
'src/models/**/*.schema.ts'
)
],
providers: [
FixturesCommand
]
})
export class AppModule {}
You can change the directory path schema to match you project directory structure.
Now you need to create a new entrypoint file and update a bit your packages.json
// src/fixtures.ts
import { CommandFactory } from "nest-commander";
import { AppModule } from "./app.module";
async function bootstrap() {
await CommandFactory.run(AppModule)
}
bootstrap()
"scripts": {
"fixtures": "npm run build && node dist/fixtures fixtures",
"fixtures:delete": "npm run build && node dist/fixtures fixtures --delete"
}
You can now run either:
npm run fixtures
to import data into your databasenpm run fixtures:delete
to purge the database and import data
Fixtures dependencies
You'll sometimes have some fixtures that will require data from other fixtures.
// src/datafixtures/user.fixtures.ts
import { Injectable } from '@nestjs/common'
import { InjectModel } from '@nestjs/mongoose'
import { Model } from 'mongoose'
import { Fixtures, ReferenceRepository } from '@dauflo/nest-fixtures'
import { User, UserDocument } from 'src/models/users/user.schema'
@Injectable()
export class UserFixtures extends Fixtures {
constructor(
private reference: ReferenceRepository,
@InjectModel(User.name) private userModel: Model<UserDocument>
) {
super()
}
async load(): Promise<void> {
const user = new this.userModel({
name: 'Alex'
})
const userDoc = await user.save()
this.reference.addReference('user', userDoc)
}
}
// src/datafixtures/cat.fixtures.ts
import { Injectable } from '@nestjs/common'
import { InjectModel } from '@nestjs/mongoose'
import { Model } from 'mongoose'
import { Fixtures } from '@dauflo/nest-fixtures'
import { Cat, CatDocument } from 'src/models/cats/cat.schema'
@Injectable()
export class CatFixtures extends Fixtures {
constructor(
private reference: ReferenceRepository,
@InjectModel(Cat.name) private catModel: Model<CatDocument>
) {
super()
}
async load(): Promise<void> {
const user = this.reference.getReference('user')
new this.catModel({
name: 'Higgins',
owner: user
}).save()
}
getDependencies(): string[] {
return [UserFixtures.name]
}
}
To create dependencies, just add the getDependencies
method and give the fixtures you need.
The ReferenceRepository
is a singleton
that will keep track of the data passed from fixtures to fixtures.
Discriminator
You can use the mongoose discriminator feature in your fixtures. You just need to add put your discriminators class in a folder named for example discri
and add the following definition when importing the fixtures modules:
// src/app.module.ts
import { FixturesCommand, FixturesModule } from '@dauflo/nest-fixtures'
@Module({
imports: [
FixturesModule.forRootAsync(
'src/datafixtures/*.fixtures.ts',
'src/models/**/*.schema.ts',
'discri'
)
],
providers: [
FixturesCommand
]
})
export class AppModule {}
License
This project is licensed under the MIT License - see the LICENSE file for details.