cherrypick/packages/backend/src/models/entities/NoteUnread.ts

import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
import { id } from '../id.js';
import { User } from './User.js';
import { Note } from './Note.js';
import type { Channel } from './Channel.js';

@Entity()
@Index(['userId', 'noteId'], { unique: true })
export class NoteUnread {
	@PrimaryColumn(id())
	public id: string;

	@Index()
	@Column(id())
	public userId: User['id'];

	@ManyToOne(type => User, {
		onDelete: 'CASCADE',
	})
	@JoinColumn()
	public user: User | null;

	@Index()
	@Column(id())
	public noteId: Note['id'];

	@ManyToOne(type => Note, {
		onDelete: 'CASCADE',
	})
	@JoinColumn()
	public note: Note | null;

	/**
	 * メンションか否か
	 */
	@Index()
	@Column('boolean')
	public isMentioned: boolean;

	/**
	 * ダイレクト投稿か否か
	 */
	@Index()
	@Column('boolean')
	public isSpecified: boolean;

	//#region Denormalized fields
	@Index()
	@Column({
		...id(),
		comment: '[Denormalized]',
	})
	public noteUserId: User['id'];

	@Index()
	@Column({
		...id(),
		nullable: true,
		comment: '[Denormalized]',
	})
	public noteChannelId: Channel['id'] | null;
	//#endregion
}