How to build event registration in Bubble

To build event registration in Bubble, you create an Event data type, a way for users to sign up (usually by creating a new Registration thing), and a workflow that checks capacity and prevents duplicates. The core idea: each time a user registers, you create a Registration entry linked to the Event and the User, and optionally update the Event’s attendee list or count.

Data Structure

You only need two data types:

• Event — fields: Title (text), Date (date), Capacity (number), Attendees (list of Users or list of Registrations)
• Registration — fields: Event (Event), User (User), Timestamp (date)

Storing registrations as their own data type is cleaner because it avoids duplicates and makes cancellations easier.

Building the Registration Form

On the Event page, add a button like “Register”. When clicked, it runs a workflow. Before creating anything, you check two conditions:

• User not already registered: Do a search for Registrations filtered by User = Current User and Event = Current Page Event.
• Capacity not full: Compare Event’s Attendees count with Event’s Capacity.

Workflow Logic

Inside the button workflow:

• Action: Create a new Registration
• Set field Event = Current Page Event
• Set field User = Current User

If you also store attendees inside Event:

• Action: Make changes to Event
• Field Attendees add Current User

Privacy Rules

For the Registration data type:

• Allow “User can view only registrations where User = Current User”.
• Admin role can view all if needed.

This ensures users don’t see others’ registrations.

Optional: Confirmation Email

After registration is created, add an email step using Bubble’s built‑in email action:

// Send confirmation email
Send email: To = Current User's email
Subject = "You're registered!"
Body = "Thanks for registering for " + Current Page Event's Title

Optional: Prevent Double Clicks

Disable the Register button while workflow is running using the element’s Conditional tab to prevent duplicate creations.

Optional: Listing Attendees

Create a repeating group of type Registration with source “Search for Registrations where Event = Current Page Event”. Display each Registration’s User’s name.