refactoring

Resolve #7779

packages/backend/src/models/entities/user-group.ts

@@ -0,0 +1,46 @@
+import { Entity, Index, JoinColumn, Column, PrimaryColumn, ManyToOne } from 'typeorm';
+import { User } from './user';
+import { id } from '../id';
+
+@Entity()
+export class UserGroup {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column('timestamp with time zone', {
+		comment: 'The created date of the UserGroup.'
+	})
+	public createdAt: Date;
+
+	@Column('varchar', {
+		length: 256,
+	})
+	public name: string;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The ID of owner.'
+	})
+	public userId: User['id'];
+
+	@ManyToOne(type => User, {
+		onDelete: 'CASCADE'
+	})
+	@JoinColumn()
+	public user: User | null;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public isPrivate: boolean;
+
+	constructor(data: Partial<UserGroup>) {
+		if (data == null) return;
+
+		for (const [k, v] of Object.entries(data)) {
+			(this as any)[k] = v;
+		}
+	}
+}