Meetup registration system with PostgreSQL database & interactive giveaway tool

This workflow contains community nodes that are only compatible with the self-hosted version of n8n.

🎉 n8n Workflow: Meetup Registration & Giveaway Picker

This n8n workflow is designed to handle both participant registration and giveaway winner selection, fully integrated with a frontend experience.

📋 Participant Registration Flow

This part of the workflow automates the registration process for meetup attendees.

🔄 Steps:

1. 📝 Participant Form (Webhook Trigger)

   • Triggered when a user submits the form.
   • Captures fields like nama_lengkap, email, whatsapp, discord_username, and more.

2. 🛠️ Data Mapping

   • Maps raw form inputs into a structured format.
   • Supports trimming, validation, and transformation as needed.

3. 💾 Save to Database

   • Performs an upsert operation to store participant info in PostgreSQL.
   • Prevents duplicate entries based on unique ID (e.g., WhatsApp or email).

4. ✅ Confirmation Screen

   • Returns a success message or thank-you page after registration is complete.

🎁 Giveaway App

This section serve frontend app to display and select random winners.

🔄 Steps:

1. 🌐 Webhook GET (Giveaway App)

   • Exposes a public endpoint that delivers a ready-to-use HTML app.
   • Can be opened in a browser or projected during the event.

2. 📥 Fetch Participants

   • Executes a SQL query to retrieve all participant records from the database.

3. 🧮 Format Participant Data

   • Redacts personal details (e.g., masks WhatsApp numbers).
   • Encodes the id using Base64 for privacy and uniqueness.

4. 📤 Render Giveaway App

   • Returns an HTML-based Single Page Application with the participant list included.
   • Allows the host to click a button to pick random winners live.

✅ Use Case Highlights

• Streamlined participant collection and storage using n8n workflows
• Secure data handling with redaction and ID encoding
• Frontend integration for a fun, interactive giveaway experience
• Reusable for other community events, workshops, or internal team draws