How to assign a unique username

Often, you'd run into a situation where you need a unique value for each user. The method to check that a value is unique can be extended to various situations. It can be a username, slug or anything else.

To explain how you can let a user set a unique username for them.

Editor - https://bubble.io/page?type=page&name=slug&id=nocodeassistant-tutorials&tab=tabs-1

Preview - https://nocodeassistant-tutorials.bubbleapps.io/version-test/slug

Assigning a new username

I've placed a repeating group to search and display the user's details. And on the right, I've set up input to type a new username. Upon selecting a user on the left, their details will be displayed in the User Info group on the right.

When we click on the button Set, I set up two workflows to check the validity of the new username. The username/slug details are stored in the User data type for each user.  

Check if the username is unique

To check if the username is unique, I search for Users with constraint as Slug=Input's value. If the count is 0, the username is unique, and I can display a success message.

If the username is not unique

If the count > 0, another user has already taken the username/slug, and it is not valid.

I then display an error message to the user to try a new username.

Editor - https://bubble.io/page?type=page&name=slug&id=nocodeassistant-tutorials&tab=tabs-1

Preview - https://nocodeassistant-tutorials.bubbleapps.io/version-test/slug

If you need help with your Bubble app, hit me at himanshu@nocodeassistant.com or follow me on Twitter.