Error: Cannot query across many-to-many for property on updating - postgresql

Question

I am try to update many to may relation.
export class CreateProductDto {
#ApiProperty()
#IsString()
description: string;
#ApiProperty()
#IsString()
name: string;
#ApiProperty({ isArray: true })
#IsNumber({}, { each: true })
#IsArray()
categoryIds: number[];
}
export class UpdateProductDto extends PartialType(CreateProductDto) {}
export class ProductsService {
constructor(
#InjectRepository(Product)
private productRepository: Repository<Product>,
private categoriesService: CategoriesService,
) {}
async update(id: number, updateProductDto: UpdateProductDto) {
let categories: Category[] = undefined;
if (updateProductDto.categoryIds) {
categories = await Promise.all(
updateProductDto.categoryIds.map(
async (id) => await this.categoriesService.findOneOrFail(id),
),
);
delete updateProductDto.categoryIds;
}
await this.productRepository.update(
{ id },
{ ...updateProductDto, categories },
);
return await this.findOneOrFail(id);
}
async findOneOrFail(id: number) {
const product = await this.productRepository.findOne({ id });
if (product) {
return product;
}
throw new BadRequestException(`Product is not present`);
}
}
#Entity()
export class Product extends BaseEntity {
#Column()
description: string;
#Column()
name: string;
#ManyToMany(() => Category, (object) => object.products, {
cascade: true,
eager: true,
})
#JoinTable()
categories: Category[];
}
#Entity()
export class Category extends BaseEntity {
#Column()
name: string;
#ManyToMany(() => Product, (object) => object.categories)
products: Product[];
}
Finally when i try to call ProductsService.update with this payload it
"categoryIds": [ 2 ]
i got an error like this
Error: Cannot query across many-to-many for property categories
Can some please help me to update many to many

Answer 1

In your Category Entity add the relation id of Product and use save method instead of update when you update your entity.
#Entity()
export class Category extends BaseEntity {
#Column()
name: string;
#ManyToMany(() => Product, (object) => object.categories)
products: Product[];
// Add this
#Column()
productId: string;
}

Answer 2

To solve problemes like i use.
async dummyUpdate(objetUpdateDto: ObjectUpdateDto): Promise<TypeReturn> {
const { idObjectToUpdate, colum1ToUpate, colum2ToUpate } = objetUpdateDto;
try {
const objectToUpdate = await this.repositoryOfEntity.findOne(idObjectToUpdate);
idObjectToUpdate.colum1ToUpate = colum1ToUpate;
idObjectToUpdate.colum2ToUpate = colum2ToUpate;
await this.repositoryOfEntity.save(objectToUpdate);
return objectToUpdate,
} catch(err) {
throw new ConflictException("your message" + err);
}
}