mvp

apps/backend/src/projects/entities/project-activity.entity.ts

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+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  Index,
+  JoinColumn,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import { UserEntity } from '../../users/entities/user.entity';
+import { ProjectEntity } from './project.entity';
+
+@Entity('project_activities')
+export class ProjectActivityEntity {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @ManyToOne(() => ProjectEntity, (project) => project.activities, {
+    onDelete: 'CASCADE',
+  })
+  @JoinColumn({ name: 'project_id' })
+  project!: ProjectEntity;
+
+  @Index('idx_project_activities_project_created')
+  @Column({ name: 'project_id', type: 'char', length: 36 })
+  projectId!: string;
+
+  @ManyToOne(() => UserEntity, { nullable: true, onDelete: 'SET NULL' })
+  @JoinColumn({ name: 'actor_user_id' })
+  actorUser!: UserEntity | null;
+
+  @Column({ name: 'actor_user_id', type: 'char', length: 36, nullable: true })
+  actorUserId!: string | null;
+
+  @Column({ type: 'varchar', length: 80 })
+  action!: string;
+
+  @Column({ type: 'json', nullable: true })
+  metadata!: Record<string, string | number | boolean | null> | null;
+
+  @CreateDateColumn({ name: 'created_at', type: 'datetime', precision: 3 })
+  createdAt!: Date;
+}