refactoring

Resolve #7779

packages/backend/src/models/entities/note-reaction.ts

@@ -0,0 +1,44 @@
+import { PrimaryColumn, Entity, Index, JoinColumn, Column, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { Note } from './note';
+import { id } from '../id';
+
+@Entity()
+@Index(['userId', 'noteId'], { unique: true })
+export class NoteReaction {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the NoteReaction.'
+	})
+	public createdAt: Date;
+
+	@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;
+
+	// TODO: 対象noteのuserIdを非正規化したい(「受け取ったリアクション一覧」のようなものを(JOIN無しで)実装したいため)
+
+	@Column('varchar', {
+		length: 260
+	})
+	public reaction: string;
+}