export abstract class BaseCollection extends BaseEntity {
    @CreateDateColumn({ type: 'timestamp', default: () => 'LOCALTIMESTAMP' })
    createDate: string;    
@UpdateDateColumn({ type: 'timestamp', name: 'update_date', default: () => 'LOCALTIMESTAMP' })
    updateDate: string;    
@VersionColumn({ name: 'data_version' })
    dataVersion: number;
}