MissingSchemaError in Nestjs - mongodb

Question

hello everyone i'm not able specify relation to another model. when i add a relation it's showing me this error
Book Model
import { Prop, Schema, SchemaFactory } from '#nestjs/mongoose';
import { Document } from 'mongoose';
export type BookDocument = Book & Document;
#Schema({ timestamps: true, collection: 'books' })
export class Book {
#Prop({ type: String, required: true })
name: string;
#Prop({ type: String, required: true })
author: string;
#Prop({ type: String, required: true })
bookType: string;
}
export const BooksSchema = SchemaFactory.createForClass(Book);
BookLend Model
import { Prop, Schema, SchemaFactory } from '#nestjs/mongoose';
import { Schema as mongooseSchema, Document } from 'mongoose';
import { Book } from '../../books/enitiy/book.model';
import { IsNotEmpty } from 'class-validator';
export type BookLendDocument = BookLend & Document;
#Schema({ timestamps: true })
export class BookLend {
#IsNotEmpty()
#Prop({ type: mongooseSchema.Types.ObjectId, ref: 'books', required: true })
bookId: Book;
#IsNotEmpty()
#Prop({ type: String, required: true })
name: string;
#IsNotEmpty()
#Prop({ type: String, required: true })
returnDate: string;
#Prop({ type: String })
returnedOn: string;
#IsNotEmpty()
#Prop({ type: String, required: true })
status: string;
}
export const BookLendSchema = SchemaFactory.createForClass(BookLend);
i'm referring the books objectID to booklend booksID , when i use below code i'm getting error MissingSchemaError: Schema hasn't been registered for model "books".
const allBookLendDetails = await this.bookLend
.find()
.populate('bookId')
.exec();

Answer 1

hi guy's I fixed it by importing the BooksSchema into BookLend Module file
here ref code:-
import { Module } from '#nestjs/common';
import { BookLendService } from './book-lend.service';
import { BookLendController } from './book-lend.controller';
import { MongooseModule } from '#nestjs/mongoose';
import { BookLendSchema } from './entities/book-lend.entity';
import { CommonService } from '../common-service/common-service.service';
import { BooksSchema } from '../books/enitiy/book.model';
#Module({
imports: [
MongooseModule.forFeature([
{ name: 'booklend', schema: BookLendSchema },
{ name: 'books', schema: BooksSchema },
]),
],
controllers: [BookLendController],
providers: [BookLendService, CommonService],
})
export class BookLendModule {}
In the service file, you need to inject the model
constructor(
#InjectModel('booklend') private readonly bookLend: Model<BookLend>,
#InjectModel('books') private readonly books: Model<Book>
) {}