problem with saving entity that includes another entity

I am new with NestJs and TypeOrm .

my Database is Mysql2 .

This is planOrder.entity

// planOrder.entity import { Media } from 'src/media/media.entity'; import { Entity, PrimaryGeneratedColumn, ManyToOne, OneToOne, CreateDateColumn, UpdateDateColumn } from 'typeorm'; import { Plan } from './plan.entity'; import { Transaction } from 'src/transaction/entities/transaction.entity'; @Entity() export class PlanOrder { @PrimaryGeneratedColumn() id: number; @ManyToOne(() => Media, (media) => media.id) media: Media; @ManyToOne(() => Plan, (plan) => plan.id) plan: Plan @OneToOne(() => Transaction, (transaction) => transaction.id) transaction: Transaction @CreateDateColumn() createdAt: Date; @UpdateDateColumn() updatedAt: Date; } 

and when I wanna to create new plan order like this :

// planOrderService.ts async create(body: CreatePlanOrderDto, userId: number) { // creating transaction is done successfully const transaction = await this.transactionService.create({ amount: body.amount, description: body.description, paymentDate: body.paymentDate, refrenceNumber: body.refrenceNumber, userId }) const planOrder = this.planOrderRepository.create() planOrder.transaction = transaction // if I remove this line it would be saved without any errors try { // error happens here this.planOrderRepository.save(planOrder) } catch (error) { console.log('e', error) } } 

first I create an transaction .

then I add that transaction to orderPlan entity

then I save it .

but it can't be saved

and I get an error

/home/morteza/Desktop/simple-vedica-back/src/query-builder/UpdateQueryBuilder.ts:681 throw new UpdateValuesMissingError() ^ UpdateValuesMissingError: Cannot perform update query because update values are not defined. Call "qb.set(...)" method to specify updated values. at UpdateQueryBuilder.createUpdateExpression (/home/morteza/Desktop/simple-vedica-back/src/query-builder/UpdateQueryBuilder.ts:681:19) at UpdateQueryBuilder.getQuery (/home/morteza/Desktop/simple-vedica-back/src/query-builder/UpdateQueryBuilder.ts:53:21) at UpdateQueryBuilder.getQueryAndParameters (/home/morteza/Desktop/simple-vedica-back/src/query-builder/QueryBuilder.ts:495:28) at UpdateQueryBuilder.execute (/home/morteza/Desktop/simple-vedica-back/src/query-builder/UpdateQueryBuilder.ts:142:50) at updateSubject (/home/morteza/Desktop/simple-vedica-back/src/persistence/SubjectExecutor.ts:618:63) at Array.map () at SubjectExecutor.executeUpdateOperations (/home/morteza/Desktop/simple-vedica-back/src/persistence/SubjectExecutor.ts:670:34) at SubjectExecutor.execute (/home/morteza/Desktop/simple-vedica-back/src/persistence/SubjectExecutor.ts:148:20) at processTicksAndRejections (node:internal/process/task_queues:95:5) at EntityPersistExecutor.execute (/home/morteza/Desktop/simple-vedica-back/src/persistence/EntityPersistExecutor.ts:182:21)