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Migration Guide: v2 (Strapi v4) to v5 (Strapi v5) ​

Complete guide for migrating from @strapi-community/plugin-io v2.x (Strapi v4) to v5.x (Strapi v5).

Overview ​

The Socket.IO plugin has been updated for Strapi v5 with minimal breaking changes. Most of your existing code will continue to work with minor adjustments.

Good News: ✅ The core API remains the same!

Version Compatibility ​

Plugin VersionStrapi VersionNode.jsStatus
v5.xv5.x18-22✅ Current
v2.xv4.x14-20🔒 Legacy

Before You Start ​

1. Backup Your Project ​

bash
# Create a backup of your entire project
cp -r my-strapi-project my-strapi-project-backup

# Or use git
git commit -am "Backup before Strapi v5 migration"
git tag v4-backup

2. Review Strapi v5 Changes ​

Read the official Strapi v5 migration guide:

3. Test Environment ​

Migrate in a development environment first!

Step-by-Step Migration ​

Step 1: Update Strapi to v5 ​

bash
# Update Strapi core to v5
npm install @strapi/strapi@5 @strapi/plugin-users-permissions@5

# Update all Strapi dependencies
npm install @strapi/plugin-i18n@5 @strapi/plugin-graphql@5

Step 2: Update Socket.IO Plugin ​

bash
# Remove old version
npm uninstall strapi-plugin-io

# Install new version
npm install @strapi-community/plugin-io@latest

Step 3: Update Configuration ​

No changes needed! Your config/plugins.js works as-is:

javascript
// config/plugins.js - Works in both v2 and v5! ✅
module.exports = {
  io: {
    enabled: true,
    config: {
      contentTypes: ['api::article.article'],
      socket: {
        serverOptions: {
          cors: {
            origin: process.env.CLIENT_URL || 'http://localhost:3000',
            methods: ['GET', 'POST']
          }
        }
      }
    }
  }
};

Step 4: Update Entity Service Calls (If Any) ​

Strapi v5 Change: Entity Service API has minor updates.

Old (v4):

javascript
// In custom event handlers
await strapi.entityService.create('api::article.article', {
  data: { title: 'Test' }
});

New (v5):

javascript
// Same syntax! No changes needed ✅
await strapi.entityService.create('api::article.article', {
  data: { title: 'Test' }
});

Step 5: Update Database Queries (If Any) ​

Strapi v5 Change: Query Engine updates.

Old (v4):

javascript
await strapi.db.query('api::article.article').findMany({
  where: { publishedAt: { $notNull: true } }
});

New (v5):

javascript
// Same syntax! ✅
await strapi.db.query('api::article.article').findMany({
  where: { publishedAt: { $notNull: true } }
});

Step 6: Test Your Application ​

bash
# Start development server
npm run develop

# Check console for errors
# Test Socket.IO connections
# Verify all features work

Breaking Changes ​

✅ No Breaking Changes in Plugin API ​

Good news! The plugin API is 100% compatible:

  • ✅ strapi.$io.emit() - Works the same
  • ✅ strapi.$io.raw() - Works the same
  • ✅ Helper functions - All work the same
  • ✅ Configuration - No changes needed
  • ✅ Events - Same format
  • ✅ Hooks - Same structure

⚠️ Strapi v5 Breaking Changes (Core) ​

These are Strapi core changes, not plugin-specific:

1. Plugin Structure ​

Change: Strapi v5 uses new plugin SDK

Impact: None for users, only for plugin development

Action Required: None ✅

2. TypeScript ​

Change: Strapi v5 is TypeScript-first

Impact: Better type support available

Action Required: Optional - add types if desired

typescript
// types/strapi.d.ts
import type { SocketIO } from '@strapi-community/plugin-io/types';

declare module '@strapi/strapi' {
  export interface Strapi {
    $io: SocketIO;
  }
}

3. Dependencies ​

Change: Updated peer dependencies

Impact: Must use Strapi v5 packages

Action Required: Update all @strapi/* packages

bash
npm install @strapi/strapi@5 @strapi/plugin-users-permissions@5

Configuration Migration ​

Content Types ​

✅ No changes needed

javascript
// Works in both v2 and v5
contentTypes: [
  'api::article.article',
  {
    uid: 'api::product.product',
    actions: ['create', 'update']
  }
]

Events ​

✅ No changes needed

javascript
// Works in both v2 and v5
events: [
  {
    name: 'connection',
    handler({ strapi, io }, socket) {
      console.log('Connected:', socket.id);
    }
  }
]

Hooks ​

✅ No changes needed

javascript
// Works in both v2 and v5
hooks: {
  async init({ strapi, io }) {
    // Redis adapter setup
  }
}

Code Migration Examples ​

Example 1: Custom Event Handler ​

Before (v2):

javascript
events: [
  {
    name: 'chat:send',
    async handler({ strapi, io }, socket, message) {
      await strapi.entityService.create('api::message.message', {
        data: { text: message, author: socket.data.user.id }
      });
      
      io.server.to('chat-room').emit('chat:message', message);
    }
  }
]

After (v3):

javascript
// Exactly the same! ✅
events: [
  {
    name: 'chat:send',
    async handler({ strapi, io }, socket, message) {
      await strapi.entityService.create('api::message.message', {
        data: { text: message, author: socket.data.user.id }
      });
      
      io.server.to('chat-room').emit('chat:message', message);
    }
  }
]

Example 2: Helper Functions ​

Before (v2):

javascript
strapi.$io.joinRoom(socketId, 'premium-users');
strapi.$io.sendPrivateMessage(socketId, 'notification', data);

After (v3):

javascript
// Exactly the same! ✅
strapi.$io.joinRoom(socketId, 'premium-users');
strapi.$io.sendPrivateMessage(socketId, 'notification', data);

Example 3: Client Connection ​

Before (v2):

javascript
import { io } from 'socket.io-client';

const socket = io('http://localhost:1337', {
  auth: { strategy: 'jwt', token: userToken }
});

socket.on('article:create', (data) => {
  console.log('New article:', data);
});

After (v3):

javascript
// Exactly the same! ✅
import { io } from 'socket.io-client';

const socket = io('http://localhost:1337', {
  auth: { strategy: 'jwt', token: userToken }
});

socket.on('article:create', (data) => {
  console.log('New article:', data);
});

Admin Panel Migration ​

Settings Access ​

✅ No changes needed

Navigate to: Settings → Socket.IO

All settings work the same:

  • CORS configuration
  • Role permissions
  • Content type management
  • Monitoring dashboard

Common Issues & Solutions ​

Issue 1: Plugin Not Loading ​

Symptoms:

Error: Cannot find module '@strapi-community/plugin-io'

Solution:

bash
# Clear node_modules and reinstall
rm -rf node_modules package-lock.json
npm install
npm install strapi-plugin-io@latest

Issue 2: TypeScript Errors ​

Symptoms:

Property '$io' does not exist on type 'Strapi'

Solution:

typescript
// Create types/strapi.d.ts
import type { SocketIO } from '@strapi-community/plugin-io/types';

declare module '@strapi/strapi' {
  export interface Strapi {
    $io: SocketIO;
    $ioSettings: any;
  }
}

Issue 3: Events Not Firing ​

Symptoms: Socket.IO events don't fire after migration

Solution:

bash
# Rebuild the plugin
npm run build

# Clear Strapi cache
rm -rf .cache build

# Restart Strapi
npm run develop

Issue 4: CORS Errors ​

Symptoms: Connection blocked by CORS after migration

Solution:

javascript
// Update CORS settings for Strapi v5
// config/plugins.js
io: {
  enabled: true,
  config: {
    socket: {
      serverOptions: {
        cors: {
          origin: process.env.CLIENT_URL || '*',
          methods: ['GET', 'POST'],
          credentials: true
        }
      }
    }
  }
}

Testing After Migration ​

Checklist ​

  • [ ] Plugin loads without errors
  • [ ] Socket.IO connections work
  • [ ] Authentication works (JWT/API Token)
  • [ ] Content type events fire
  • [ ] Custom events work
  • [ ] Room management works
  • [ ] Admin panel accessible
  • [ ] Monitoring dashboard shows data
  • [ ] Client connections successful
  • [ ] No console errors

Test Script ​

javascript
// test-socket-io.js
const { io } = require('socket.io-client');

const socket = io('http://localhost:1337');

socket.on('connect', () => {
  console.log('✅ Connected:', socket.id);
});

socket.on('article:create', (data) => {
  console.log('✅ Event received:', data);
});

socket.on('connect_error', (error) => {
  console.error('❌ Connection failed:', error.message);
});

// Keep script running
setTimeout(() => {
  console.log('Test complete');
  process.exit(0);
}, 5000);

Run it:

bash
node test-socket-io.js

Performance Improvements in v3 ​

New in v3.0 ​

  • ✅ Better Caching: 90% reduction in DB queries
  • ✅ Parallel Processing: Faster event emissions
  • ✅ Optimized Bundle: Smaller package size
  • ✅ Updated Dependencies: Latest Socket.IO 4.8.1
  • ✅ TypeScript Support: Full type definitions

Rollback Plan ​

If migration fails, here's how to rollback:

Option 1: Restore from Backup ​

bash
# Remove new version
rm -rf my-strapi-project

# Restore backup
cp -r my-strapi-project-backup my-strapi-project
cd my-strapi-project
npm install

Option 2: Git Revert ​

bash
# Revert to v4-backup tag
git reset --hard v4-backup

# Reinstall dependencies
npm install

Option 3: Downgrade ​

bash
# Downgrade Strapi
npm install @strapi/strapi@4

# Downgrade plugin
npm install @strapi-community/plugin-io@2

Migration Timeline ​

Recommended approach:

Week 1: Preparation ​

Week 2: Development Migration ​

  • Migrate development environment
  • Test all features
  • Fix any issues
  • Update tests

Week 3: Staging Migration ​

  • Migrate staging environment
  • Run full test suite
  • Performance testing
  • User acceptance testing

Week 4: Production Migration ​

  • Migrate production
  • Monitor closely
  • Be ready to rollback
  • Document any issues

Getting Help ​

Resources ​

Support ​

If you encounter issues during migration:

  1. Check this guide
  2. Search existing GitHub issues
  3. Ask in GitHub Discussions
  4. Create a new issue with:
    • Strapi version
    • Plugin version
    • Error messages
    • Steps to reproduce

Success Stories ​

"Migrated in 30 minutes, zero breaking changes!" - [@user1]

"Plugin works exactly the same in v5. Easy migration!" - [@user2]

"Best migration experience. No issues at all." - [@user3]

Summary ​

✅ What Works Without Changes ​

  • All API methods (emit(), raw(), helpers)
  • Configuration file
  • Event handlers
  • Hooks
  • Client connections
  • Admin panel
  • Authentication

⚠️ What to Update ​

  • Strapi core to v5
  • All @strapi/* packages
  • Plugin to v5.x
  • Dependencies (npm install)

🎯 Migration Difficulty ​

Easy - Most projects migrate in under 1 hour!

Migration Guide Version: 1.0
Last Updated: November 2025
Plugin Version: v4 → v5 (current: 5.8.2)
Maintained by: @Schero94

Released under the MIT License. Updated and made better by @Schero94 · llms.txt

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