How do you set up Mongoose in a NestJS application and define a schema?

Q: How do you set up Mongoose in a NestJS application and define a schema?

// npm i @nestjs/mongoose mongoose // AppModule @Module({ imports: [ MongooseModule.forRoot(process.env.MONGODB_URI), UsersModule, ], }) export class AppModule {} // Schema definition @Schema({ timestamps: true }) // adds createdAt, updatedAt automatically export class User { @Prop({ required: true, unique: true }) email: string; @Prop({ required: true, select: false }) password: string; @Prop() name?: string; @Prop({ type: [{ type: MongooseSchema.Types.ObjectId, ref: 'Post' }] }) posts: Types.ObjectId[]; } export const UserSchema = SchemaFactory.createForClass(User); export type UserDocument = HydratedDocument ; // Feature module @Module({ imports: [ MongooseModule.forFeature([{ name: User.name, schema: UserSchema }]), ], providers: [UsersService], }) export class UsersModule {} // Service injection @Injectable() export class UsersService { constructor( @InjectModel(User.name) private userModel: Model , ) {} } @Schema({ timestamps: true }) automatically adds createdAt and updatedAt fields to every document. SchemaFactory.createForClass(User) generates the Mongoose schema from the decorated class. MongooseModule.forFeature() registers the model for the feature module's DI scope. @InjectModel(User.name) injects the Mongoose Model — always use the class .name property, not a string literal. HydratedDocument is the correct type for a Mongoose document with instance methods.

Difficulty: 5/10

Mongoose integration, NestJS modules, Schema definition

Install @nestjs/mongoose and mongoose, then import MongooseModule.forRoot() in AppModule. Define schemas using @Schema() and @Prop() decorators on classes and generate the schema with SchemaFactory.createForClass(). Register schemas in feature modules with MongooseModule.forFeature() and inject the model with @InjectModel().

Mongoose setup, schema definition, and model injection

Mongoose setup rules:

1
@Schema({ timestamps: true }) automatically adds createdAt and updatedAt fields to every document.
2

How do you set up Mongoose in a NestJS application and define a schema?

Difficulty: 5/10

Mongoose integration, NestJS modules, Schema definition

Install @nestjs/mongoose and mongoose, then import MongooseModule.forRoot() in AppModule. Define schemas using @Schema() and @Prop() decorators on classes and generate the schema with SchemaFactory.createForClass(). Register schemas in feature modules with MongooseModule.forFeature() and inject the model with @InjectModel().

Mongoose setup, schema definition, and model injection

Mongoose setup rules:

1
@Schema({ timestamps: true }) automatically adds createdAt and updatedAt fields to every document.
2

How do you set up Mongoose in a NestJS application and define a schema?

How do you set up Mongoose in a NestJS application and define a schema?

Scenario Questions

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