Schema definition in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Schema decorator from Mongoose.

NestJS

import { [1] } from '@nestjs/mongoose';

Drag options to blanks, or click blank then click option'

ASchema

BModule

CController

DInjectable

Attempts:

3 left

💡 Hint

Common Mistakes

Importing Module or Controller instead of Schema

Forgetting to import from '@nestjs/mongoose'

The @Schema decorator is imported from @nestjs/mongoose to define a Mongoose schema in NestJS.

2fill in blank

medium

Complete the code to define a schema class named User.

NestJS

@[1]()
export class User {}

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AController

BSchema

CInjectable

DModule

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Injectable or @Controller instead of @Schema

Missing parentheses after the decorator

The @Schema() decorator marks the class as a Mongoose schema in NestJS.

3fill in blank

hard

Fix the error in the property decorator to define a schema property.

NestJS

import { Prop } from '@nestjs/mongoose';

@Schema()
export class Product {
  @[1]()
  name: string;
}

Drag options to blanks, or click blank then click option'

AProp

BProperty

CSchema

DField

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Property or @Field which are not valid in NestJS Mongoose schemas

Forgetting to import Prop

The @Prop() decorator defines a property in the Mongoose schema.

4fill in blank

hard

Fill both blanks to create a schema factory for the User class.

NestJS

export const UserSchema = [1](User, [2]);

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ASchemaFactory.createForClass

BUser

C{ timestamps: true }

DProp

Attempts:

3 left

💡 Hint

Common Mistakes

Using the class name instead of the factory method

Passing the class name as second argument instead of options object

SchemaFactory.createForClass(User, { timestamps: true }) creates a Mongoose schema with timestamps enabled.

5fill in blank

hard

Fill all three blanks to define a schema with a required string property 'title'.

NestJS

@Schema()
export class Book {
  @[1]({ required: [2] })
  [3]: string;
}

Drag options to blanks, or click blank then click option'

AProp

Btrue

Ctitle

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using false instead of true for required

Missing the property name or using wrong decorator

The @Prop({ required: true }) decorator marks the 'title' property as required in the schema.