import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  ManyToOne,
  OneToMany,
} from 'typeorm';
import { ApiProperty } from '@nestjs/swagger';

@Entity()
export class Category {
  @ApiProperty({ description: '自增主键', type: 'int' })
  @PrimaryGeneratedColumn()
  id: number;

  @ApiProperty({ description: '名字', type: 'string' })
  @Column()
  name: string;

  @ApiProperty({ description: '描述', nullable: true, type: 'string' })
  @Column({ nullable: true })
  description: string;

  @ApiProperty({ description: 'val', nullable: true, type: 'string' })
  @Column({ nullable: true })
  val: string;

  @ApiProperty({ description: '父级', nullable: true })
  @ManyToOne((type) => Category, (category) => category.children, {
    nullable: true,
  })
  parent: Category;

  @ApiProperty({ description: '子级，多个' })
  @OneToMany((type) => Category, (category) => category.parent)
  children: Category[];
}