In this case, the store can have many owners, and the owners can have many store.
However, when i save the entity by using Repository and the problem happen:
Maximum call stack size exceeded
I think it need to use Nested Tree annotation? But i dont know how to correct it. Please help!
#Entity('store')
export class StoreEntity {
#PrimaryGeneratedColumn('uuid')
id: string;
#Column()
name: string;
...
#ManyToMany(type => UserEntity, user => user.ownStores)
#JoinTable()
owners: UserEntity[];
}
#Entity('user')
export class UserEntity {
#PrimaryGeneratedColumn('uuid')
id: string;
#Column({
type: 'varchar',
})
email: string;
...
#ManyToMany(type => StoreEntity, store => store.owners)
ownStores: StoreEntity[];
Related
I wanted to create one to one relation in typeorm (NestJS). Just like in the picture below.
I wanted then to signup user with email and password and create row in custom_auth and user_profile table.
relations
I cant find solution to create that type of relation. I was only able to create typical relation using foreign key (solution in typeorm docs)
export class CustomAuth {
#PrimaryGeneratedColumn()
id: number
#Column({ unique: true })
email: string
#Column()
password: string
#OneToOne(() => UserProfile, (userProfile) => userProfile.customAuth, {
cascade: true,
})
userProfile: UserProfile
}
export class UserProfile {
#PrimaryGeneratedColumn()
userId: number
#Column()
name: string
#Column({ nullable: true })
address: string
#OneToOne(() => CustomAuth, (customAuth) => customAuth.userProfile, {})
#JoinColumn()
customAuth: CustomAuth
}
We have this typeorm entities defined in our NestJS application:
#Entity()
export class Crawler {
#PrimaryColumn({ length: 50 })
id!: string;
...
#ManyToOne(() => CrawlerFamily, (crawlerFamily) => crawlerFamily.id, {
nullable: false,
eager: true,
})
#JoinColumn({ name: 'crawler_family_id' })
crawler_family!: CrawlerFamily;
}
#Entity()
export class CrawlerFamily {
#PrimaryGeneratedColumn()
id?: number;
#Column({ length: 255 })
name!: CrawlerFamilyName;
}
Now, when we try to search for this Crawler entity we need to use findBy instead of findOneBy when we want only one crawler, because when we try to use findOneBy this is the error message we get in response:
{"context":"RpcExceptionsHandler","level":"error","message":"Duplicate column name 'Crawler_crawler_family_id'","stack":["QueryFailedError: Duplicate column name 'Crawler_crawler_family_id'\n at Query.<anonymous> (/home/node/app/node_modules/typeorm/driver/mysql/MysqlQueryRunner.js:158:37)\n at /home/node/app/node_modules/newrelic/lib/shim/shim.js:1313:22\n at LegacyContextManager.runInContext (/home/node/app/node_modules/newrelic/lib/context-manager/legacy-context-manager.js:59:23)\n at DatastoreShim.applySegment (/home/node/app/node_modules/newrelic/lib/shim/shim.js:1303:25)\n at Query.wrappedCallback [as onResult] (/home/node/app/node_modules/newrelic/lib/shim/shim.js:1189:21)\n at Query.execute (/home/node/app/node_modules/mysql2/lib/commands/command.js:36:14)\n at PoolConnection.handlePacket (/home/node/app/node_modules/mysql2/lib/connection.js:456:32)\n at PacketParser.onPacket (/home/node/app/node_modules/mysql2/lib/connection.js:85:12)\n at PacketParser.executeStart (/home/node/app/node_modules/mysql2/lib/packet_parser.js:75:16)\n at TLSSocket.<anonymous> (/home/node/app/node_modules/mysql2/lib/connection.js:360:25)"],"timestamp":"2022-08-17T13:48:23.146Z"}
How to properly setup these entities? I've tried using #Column() decorator to change column name but it's not working.
You're using one to many/many to one wrong, see:
https://orkhan.gitbook.io/typeorm/docs/many-to-one-one-to-many-relations
Here's what you should have:
#Entity()
export class Crawler {
#PrimaryColumn({ length: 50 })
id!: string;
...
#ManyToOne(() => CrawlerFamily, (crawlerFamily) => crawlerFamily.crawler, {
nullable: false,
eager: true,
})
crawler_family!: CrawlerFamily;
}
#Entity()
export class CrawlerFamily {
#PrimaryGeneratedColumn()
id?: number;
#Column({ length: 255 })
name!: CrawlerFamilyName;
#OneToMany(() => Crawler, (crawler) => crawler.crawlerFamily)
crawler!: Crawler[];
}
I have a relationship created between User and Groups, where a group can contain multiple users and a user can be present in more than one group. The relationship was built on the UserEntity and GroupsEntity entities. The problem occurs when the request is made in Postman. The User record is created, but the ids corresponding to the relationship between groups and user are not created in the new table (relationship of the two entities).
Help codes:
UserEntitity.ts
import { AssociateEntity } from 'src/associate/entities/associate.entity';
import { Associate } from 'src/associate/interfaces/associate.interface';
import { GroupsEntity } from 'src/groups/entities/group.entity';
import { Groups } from 'src/groups/interfaces/groups.interface';
import { SubsidiaryEntity } from 'src/subsidiary/entities/subsidiary.entity';
import { Subsidiary } from 'src/subsidiary/interfaces/subsidiary.interface';
import {
Column,
DeleteDateColumn,
Entity,
JoinTable,
ManyToMany,
ManyToOne,
OneToMany,
PrimaryGeneratedColumn,
} from 'typeorm';
#Entity()
export class UserEntity {
#PrimaryGeneratedColumn()
id: number;
#Column()
name: string;
#Column()
login: string;
#Column()
password: string;
#Column()
email: string;
#Column()
adm: boolean;
#Column()
passwordValidity: string;
#Column()
initials: string;
#Column()
system: string;
#ManyToOne(() => SubsidiaryEntity, (subsidiary) => subsidiary.id)
subsidiary: Subsidiary;
#ManyToMany(() => GroupsEntity, { cascade: true })
#JoinTable()
group: Groups[];
#Column({ default: true })
status: boolean;
#DeleteDateColumn()
deletedAt: Date;
#OneToMany(() => AssociateEntity, (associate) => associate.id)
associate: Associate[];
}
GroupsEntity.ts
import { UserEntity } from 'src/user/entities/user.entity';
import { User } from 'src/user/interfaces/user.interface';
import {
Column,
DeleteDateColumn,
Entity,
ManyToMany,
PrimaryGeneratedColumn,
} from 'typeorm';
#Entity()
export class GroupsEntity {
#PrimaryGeneratedColumn()
id: number;
#Column()
description: string;
#Column({ default: true })
status: boolean;
#DeleteDateColumn()
deletedAt: Date;
#ManyToMany(() => UserEntity, (user) => user.group)
user: User;
}
user.service.ts (method create)
async create(user: User) {
try {
const groups: Array<Groups> = await this.groupService.findByIds(
user.groups,
);
//#ts-ignore
user.groups = groups;
const newUser = await this.userRepository.save(user);
return newUser;
} catch (error) {
this.logger.error(`error: ${JSON.stringify(error.message)}`);
throw new RpcException(error.code + error.message);
}
}
The structure of the bank is given by:
Bank entity relationships
The code doesn't report errors, but it doesn't create the relationship with the ids either. I'm using microservices in nestJS, the language is TypeScript and the database used is MySQL.
Join table you have define the join Column and inverseJoinColumn Details. Example
#JoinTable({
name: 'cat_use_cloth',
joinColumn: { name: 'cat_id', referencedColumnName: 'id'},
inverseJoinColumn: { name: 'cloth_id', referencedColumnName: 'id'},
})
Ref: https://medium.com/#rodrigo.tornaciole/nest-js-many-to-many-relationship-using-typeorm-and-crud-ec6ed79274f0
Having a really strange issue with TypeORM and MariaDB. I have two entities with UUIDs as the primary key. The Companies entity is working fine as it scaffolds the schema as CHAR but the users table is being instantiated as an auto increment INT.
User Entity
#Entity()
export class User {
#PrimaryGeneratedColumn('uuid')
id: string;
#Column()
firstname: string;
#Column()
lastname: string;
#Column({ unique: true })
email: string;
#Column()
password: string;
#ManyToOne(() => Company, (company) => company.users)
company: Company;
}
Companies Entity
#Entity()
export class Company {
#PrimaryGeneratedColumn('uuid')
id: string;
#Column()
name: string;
#OneToMany(() => User, (user) => user.company)
users: User[];
}
Config
const config: MysqlConnectionOptions = {
type: 'mariadb',
....
entities: ['dist/src/**/*.entity.js'],
synchronize: true,
};
Users Table Screenshot
Companies Table Screenshot
Find it really strange, is it because I'm using MariaDB instead of straight MySQL?
Okay looks like I fixed it, really odd one. Looks like something was cached incorrectly. Deleted dist folder and node modules. reinstalled and total recompile. Fixed...
I'm new to TypeORM and databases overall and I have simple question.
What is the way to 'merge' entities?
For example:
I have two entities, Product and Producer:
#Entity()
export class Product {
#PrimaryGeneratedColumn()
id: number;
#Column("int")
producer_id: number;
#Column()
producer: //I want show producer data here
#Column("varchar", { length: 255 })
name: string;
}
#Entity()
export class Producer {
#PrimaryGeneratedColumn()
id: number;
#Column()
name: string;
#Column()
logo: string;
}
As you can see, in Product entity I have producer_id property which contains ID of producer.
When I'm loading the product I want TypeORM to search through producers, get one with Id matching producer_id in Product and store it in producer property.
Maybe my question is little bit embroiled but I hope you'll get the point.
Thanks for all answers.
As far as I can see, you're looking for a one-to-many relation (one producer many products).
Check this doc from typeorm for further info. But basically do the following:
#Entity()
export class Product {
#PrimaryGeneratedColumn()
id: number;
#Column("int")
producer_id: number;
#ManyToOne(type => Producer, producer => producer.product)
producer: Producer
#Column("varchar", { length: 255 })
name: string;
}
#Entity()
export class Producer {
#PrimaryGeneratedColumn()
id: number;
#Column()
name: string;
#Column()
logo: string;
#OneToMany(type => Product, product => product.producer)
products: Product[]
}
And then in your queries specify relations to fetch:
productRepository.find({ relations: ["producer"] });
I'm not an user of typeorm, but it should be something like that