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lcbp3/specs/06-tasks/TASK-BE-015-schema-v160-migration.md
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# Task: Backend Schema v1.6.0 Migration
**Status:** ✅ Completed
**Priority:** P1 (High - Breaking Changes)
**Estimated Effort:** 3-5 days
**Dependencies:** Schema v1.6.0 already created
**Owner:** Backend Team
---
## 📋 Overview
อัพเดท Backend Entities และ DTOs ให้ตรงกับ Schema v1.6.0 ที่มีการ Refactor โครงสร้างตาราง
---
## 🎯 Objectives
- [x] Update Correspondence Entities
- [x] Update RFA Entities (Shared PK Pattern)
- [x] Update DTOs for new field names
- [x] Update Services for new relationships
- [x] Add/Update Unit Tests
---
## 📝 Schema Changes Summary
### Breaking Changes ⚠️
| Table | Change | Impact |
| --------------------------- | ---------------------------------------------- | --------------- |
| `correspondence_recipients` | FK → `correspondences(id)` | Update relation |
| `rfa_items` | `rfarev_correspondence_id``rfa_revision_id` | Rename column |
### Column Changes
| Table | Old | New | Notes |
| -------------------------- | ------------------- | ----------------------------- | ----------- |
| `correspondence_revisions` | `title` | `subject` | Rename |
| `correspondence_revisions` | - | `body`, `remarks` | Add columns |
| `rfa_revisions` | `title` | `subject` | Rename |
| `rfa_revisions` | `correspondence_id` | - | Remove |
| `rfa_revisions` | - | `body`, `remarks`, `due_date` | Add columns |
### Architecture Changes
| Table | Change |
| ------ | ---------------------------------------------------- |
| `rfas` | Shared PK with `correspondences` (no AUTO_INCREMENT) |
| `rfas` | `id` references `correspondences(id)` |
---
## 🛠️ Implementation Steps
### 1. Update CorrespondenceRevision Entity
```typescript
// File: backend/src/modules/correspondence/entities/correspondence-revision.entity.ts
// BEFORE
@Column()
title: string;
// AFTER
@Column()
subject: string;
@Column({ type: 'text', nullable: true })
body: string;
@Column({ type: 'text', nullable: true })
remarks: string;
@Column({ name: 'schema_version', default: 1 })
schemaVersion: number;
```
### 2. Update CorrespondenceRecipient Entity
```typescript
// File: backend/src/modules/correspondence/entities/correspondence-recipient.entity.ts
// BEFORE
@ManyToOne(() => CorrespondenceRevision, { onDelete: 'CASCADE' })
@JoinColumn({ name: 'correspondence_id', referencedColumnName: 'correspondenceId' })
revision: CorrespondenceRevision;
// AFTER
@ManyToOne(() => Correspondence, { onDelete: 'CASCADE' })
@JoinColumn({ name: 'correspondence_id' })
correspondence: Correspondence;
```
### 3. Update RFA Entity (Shared PK Pattern)
```typescript
// File: backend/src/modules/rfa/entities/rfa.entity.ts
// BEFORE
@PrimaryGeneratedColumn()
id: number;
// AFTER
@PrimaryColumn()
id: number;
@OneToOne(() => Correspondence, { onDelete: 'CASCADE' })
@JoinColumn({ name: 'id' })
correspondence: Correspondence;
```
### 4. Update RfaRevision Entity
```typescript
// File: backend/src/modules/rfa/entities/rfa-revision.entity.ts
// REMOVE
@Column({ name: 'correspondence_id' })
correspondenceId: number;
// RENAME
@Column()
subject: string; // was: title
// ADD
@Column({ type: 'text', nullable: true })
body: string;
@Column({ type: 'text', nullable: true })
remarks: string;
@Column({ name: 'due_date', type: 'datetime', nullable: true })
dueDate: Date;
```
### 5. Update RfaItem Entity
```typescript
// File: backend/src/modules/rfa/entities/rfa-item.entity.ts
// BEFORE
@Column({ name: 'rfarev_correspondence_id' })
rfaRevCorrespondenceId: number;
// AFTER
@Column({ name: 'rfa_revision_id' })
rfaRevisionId: number;
@ManyToOne(() => RfaRevision, { onDelete: 'CASCADE' })
@JoinColumn({ name: 'rfa_revision_id' })
rfaRevision: RfaRevision;
```
### 6. Update DTOs
```typescript
// correspondence/dto/create-correspondence-revision.dto.ts
export class CreateCorrespondenceRevisionDto {
subject: string; // was: title
body?: string;
remarks?: string;
}
// rfa/dto/create-rfa-revision.dto.ts
export class CreateRfaRevisionDto {
subject: string; // was: title
body?: string;
remarks?: string;
dueDate?: Date;
}
```
---
## 🗂️ Files to Modify
### Entities
| File | Status | Changes |
| ------------------------------------ | ------ | ----------------------------------------- |
| `correspondence.entity.ts` | ✅ | Minor: add recipients relation |
| `correspondence-revision.entity.ts` | ✅ | Rename title→subject, add body/remarks |
| `correspondence-recipient.entity.ts` | ✅ | FK change to correspondence |
| `rfa.entity.ts` | ✅ | Shared PK pattern |
| `rfa-revision.entity.ts` | ✅ | Remove correspondenceId, add body/remarks |
| `rfa-item.entity.ts` | ✅ | Rename column |
### DTOs
| File | Status | Changes |
| --------------------------------------- | ------ | ------------------------------- |
| `create-correspondence-revision.dto.ts` | ✅ | title→subject, add body/remarks |
| `update-correspondence-revision.dto.ts` | ✅ | Same |
| `create-rfa-revision.dto.ts` | ✅ | title→subject, add fields |
| `update-rfa-revision.dto.ts` | ✅ | Same |
| `create-rfa-item.dto.ts` | ✅ | Column rename |
### Services
| File | Status | Changes |
| --------------------------- | ------ | -------------------------------- |
| `correspondence.service.ts` | ✅ | Update queries for new relations |
| `rfa.service.ts` | ✅ | Handle Shared PK creation |
---
## ✅ Verification
### Unit Tests
```bash
# Run existing tests to verify compatibility
pnpm test:watch correspondence
pnpm test:watch rfa
```
### Integration Tests
1. Create new Correspondence → verify subject field saved
2. Create new RFA → verify Shared PK pattern works
3. Verify recipients linked to correspondence (not revision)
4. Verify RFA items linked via rfa_revision_id
---
## 📚 Related Documents
- [Schema v1.6.0](../07-database/lcbp3-v1.6.0-schema.sql)
- [Data Dictionary v1.6.0](../07-database/data-dictionary-v1.6.0.md)
- [CHANGELOG v1.6.0](../../CHANGELOG.md)
---
## 🚨 Risks & Mitigation
| Risk | Impact | Mitigation |
| ----------------- | ------ | ------------------------------------ |
| Breaking frontend | High | Update frontend types simultaneously |
| Data migration | Medium | Schema already handles FK changes |
| Test failures | Low | Update tests with new field names |
---
## 📌 Notes
- Schema v1.6.0 SQL files already exist in `specs/07-database/`
- This task focuses on **backend code changes only**
- Frontend will need separate task for DTO/type updates
- Consider feature flag for gradual rollout