neo/TENANT_MIGRATION_IMPLEMENTATION_COMPLETE.md

Tenant Migration Implementation - Complete

✅ Implementation Summary

All tenant migration functionality has been successfully added to the backend. This implementation provides comprehensive tools for managing database schema changes across all tenants in the multi-tenant platform.

📁 Files Created

Scripts Directory: /root/neo/backend/scripts/

1. migrate-tenant.ts (167 lines)

   • Migrates a single tenant by slug or ID
   • Handles password decryption
   • Provides detailed progress output
   • Usage: npm run migrate:tenant <slug-or-id>

2. migrate-all-tenants.ts (170 lines)

   • Migrates all active tenants in sequence
   • Collects success/failure statistics
   • Provides comprehensive summary
   • Exits with error code if any tenant fails
   • Usage: npm run migrate:all-tenants

3. check-migration-status.ts (181 lines)

   • Checks migration status across all tenants
   • Shows completed and pending migrations
   • Identifies which tenants need updates
   • Usage: npm run migrate:status

4. README.md (Comprehensive documentation)

   • Detailed usage instructions
   • Security notes on password encryption
   • Troubleshooting guide
   • Best practices
   • Example workflows

Documentation Files

5. /root/neo/TENANT_MIGRATION_GUIDE.md (Root level guide)
   • Quick start guide
   • Architecture diagrams
   • Complete workflow examples
   • CI/CD integration examples
   • Security documentation

Updated Files

6. /root/neo/backend/package.json
   • Added 6 new migration scripts to the scripts section

🚀 Available Commands

Command	Description
npm run migrate:make <name>	Create a new migration file in migrations/tenant/
npm run migrate:status	Check migration status for all tenants
npm run migrate:tenant <slug>	Run pending migrations for a specific tenant
npm run migrate:all-tenants	Run pending migrations for all active tenants
npm run migrate:latest	Run migrations on default database (rarely used)
npm run migrate:rollback	Rollback last migration on default database

🔧 How It Works

Architecture

┌─────────────────────────────────────────────────────────┐
│                    Central Database                      │
│                                                          │
│  ┌──────────┐  ┌──────────┐  ┌──────────┐             │
│  │  Tenant  │  │  Tenant  │  │  Tenant  │             │
│  │    1     │  │    2     │  │    N     │             │
│  └──────────┘  └──────────┘  └──────────┘             │
│       │              │              │                   │
│       │ (encrypted   │              │                   │
│       │  password)   │              │                   │
└───────┼──────────────┼──────────────┼───────────────────┘
        │              │              │
        ▼              ▼              ▼
┌───────────┐  ┌───────────┐  ┌───────────┐
│  Tenant   │  │  Tenant   │  │  Tenant   │
│  DB 1     │  │  DB 2     │  │  DB N     │
│           │  │           │  │           │
│ Migrations│  │ Migrations│  │ Migrations│
│  Applied  │  │  Applied  │  │  Applied  │
└───────────┘  └───────────┘  └───────────┘

Migration Flow

1. Creating a Migration

   npm run migrate:make add_custom_fields
   # Creates: migrations/tenant/20250127123456_add_custom_fields.js
   

2. Testing on Single Tenant

   npm run migrate:tenant acme-corp
   # Output:
   # 📋 Tenant: Acme Corp (acme-corp)
   # 📊 Database: acme_corp_db
   # 🔄 Running migrations...
   # ✅ Ran 1 migration(s):
   #    - 20250127123456_add_custom_fields.js
   

3. Checking Status

   npm run migrate:status
   # Shows which tenants have pending migrations
   

4. Applying to All Tenants

   npm run migrate:all-tenants
   # Migrates all active tenants sequentially
   # Provides summary of successes/failures
   

🔐 Security Features

Password Encryption

• Tenant database passwords are encrypted using AES-256-CBC
• Stored encrypted in central database
• Automatically decrypted during migration
• Requires DB_ENCRYPTION_KEY environment variable

Environment Setup

# Required for migration scripts
export DB_ENCRYPTION_KEY="your-32-character-secret-key!!"

This key must match the key used by TenantService for encryption/decryption.

📋 Example Workflows

Scenario 1: Adding a Field to All Tenants

# 1. Create migration
npm run migrate:make add_priority_field

# 2. Edit the generated file
# migrations/tenant/20250127120000_add_priority_field.js

# 3. Test on one tenant
npm run migrate:tenant test-company

# 4. Check status
npm run migrate:status

# 5. Apply to all
npm run migrate:all-tenants

Scenario 2: Checking Migration Status

npm run migrate:status

# Output:
# 📋 Found 3 active tenant(s)
# 
# 📦 Acme Corp (acme-corp)
#    Database: acme_corp_db
#    Completed: 5 migration(s)
#    ✅ Up to date
#
# 📦 TechStart (techstart)
#    Database: techstart_db
#    Completed: 4 migration(s)
#    ⚠️  Pending: 1 migration(s)
#       - 20250127120000_add_priority_field.js
#
# 💡 Run: npm run migrate:all-tenants

Scenario 3: New Tenant Provisioning (Automatic)

When a new tenant is created via the API:

// Happens automatically in TenantProvisioningService
POST /tenants
{
  "name": "New Company",
  "slug": "new-company"
}

// Backend automatically:
// 1. Creates database
// 2. Runs all migrations
// 3. Sets tenant status to ACTIVE

🛠️ Technical Implementation

Script Structure

All scripts follow this pattern:

1. Import Dependencies

   import { PrismaClient as CentralPrismaClient } from '../prisma/generated-central/client';
   import knex, { Knex } from 'knex';
   import { createDecipheriv } from 'crypto';
   

2. Decrypt Password

   function decryptPassword(encryptedPassword: string): string {
     // AES-256-CBC decryption
   }
   

3. Create Tenant Connection

   function createTenantKnexConnection(tenant: any): Knex {
     const decryptedPassword = decryptPassword(tenant.dbPassword);
     return knex({ /* config */ });
   }
   

4. Run Migrations

   const [batchNo, log] = await tenantKnex.migrate.latest();
   

5. Report Results

   console.log(`✅ Ran ${log.length} migrations`);
   

🧪 Testing the Implementation

1. Verify Scripts Are Available

cd /root/neo/backend
npm run | grep migrate

Expected output:

migrate:make
migrate:latest
migrate:rollback
migrate:status
migrate:tenant
migrate:all-tenants

2. Test Creating a Migration

npm run migrate:make test_migration

Should create a file in migrations/tenant/

3. Check Status (if tenants exist)

npm run migrate:status

4. Test Single Tenant Migration (if tenants exist)

npm run migrate:tenant <your-tenant-slug>

📚 Documentation Locations

• Quick Reference: /root/neo/TENANT_MIGRATION_GUIDE.md
• Detailed Scripts Docs: /root/neo/backend/scripts/README.md
• Architecture Overview: /root/neo/MULTI_TENANT_IMPLEMENTATION.md

🎯 Key Features

✅ Single Tenant Migration - Target specific tenants for testing ✅ Bulk Migration - Update all tenants at once ✅ Status Checking - See which tenants need updates ✅ Progress Tracking - Detailed output for each operation ✅ Error Handling - Graceful failure with detailed error messages ✅ Security - Encrypted password storage and decryption ✅ Comprehensive Docs - Multiple levels of documentation

🔄 Integration Points

With Existing Code

1. TenantProvisioningService

   • Already uses runTenantMigrations() method
   • New scripts complement automatic provisioning
   • Same migration directory: migrations/tenant/

2. Knex Configuration

   • Uses existing knexfile.js
   • Same migration table: knex_migrations
   • Compatible with existing migrations

3. Prisma Central Client

   • Scripts use central DB to fetch tenant list
   • Same encryption/decryption logic as backend services

🚦 Next Steps

To Use This Implementation:

1. Ensure Environment Variables

   export DB_ENCRYPTION_KEY="your-32-character-secret-key!!"
   

2. Generate Prisma Client (if not already done)

   cd /root/neo/backend
   npx prisma generate --schema=prisma/schema-central.prisma
   

3. Check Current Status

   npm run migrate:status
   

4. Create Your First Migration

   npm run migrate:make add_my_feature
   

5. Test and Apply

   # Test on one tenant
   npm run migrate:tenant <slug>
   
   # Apply to all
   npm run migrate:all-tenants
   

📊 Complete File List

/root/neo/
├── TENANT_MIGRATION_GUIDE.md          (new)
└── backend/
    ├── package.json                    (updated - 6 new scripts)
    ├── knexfile.js                     (existing)
    ├── migrations/
    │   └── tenant/                     (existing)
    │       ├── 20250126000001_create_users_and_rbac.js
    │       ├── 20250126000002_create_object_definitions.js
    │       ├── 20250126000003_create_apps.js
    │       ├── 20250126000004_create_standard_objects.js
    │       └── 20250126000005_add_ui_metadata_to_fields.js
    ├── scripts/                        (new directory)
    │   ├── README.md                   (new)
    │   ├── migrate-tenant.ts           (new)
    │   ├── migrate-all-tenants.ts      (new)
    │   └── check-migration-status.ts   (new)
    └── src/
        └── tenant/
            └── tenant-provisioning.service.ts (existing - uses migrations)

✨ Summary

The tenant migration system is now fully implemented with:

• ✅ 3 TypeScript migration scripts
• ✅ 6 npm commands
• ✅ 2 comprehensive documentation files
• ✅ Full integration with existing architecture
• ✅ Security features (password encryption)
• ✅ Error handling and progress reporting
• ✅ Status checking capabilities

You can now manage database migrations across all tenants efficiently and safely! 🎉