How to build ratings and reviews in Bubble

The simplest valid way to build ratings and reviews in Bubble is to create a Review data type with fields for rating, comment, author, and the thing being reviewed, then create a form that creates a new Review, and finally display reviews with a repeating group and calculate average rating using :average on the Review’s rating field. Bubble handles the math automatically as long as your data structure is correct.

Data Structure

You need one new data type: Review. This keeps everything clean and scalable.

• Review
  • rating (number)
  • comment (text)
  • author (User)
  • thing\_reviewed (whatever you’re reviewing, e.g. Product, Course, Listing)
  • created\_date (auto, works for sorting)

You do NOT put a list of reviews on the thing being reviewed. Bubble can always “Search for Reviews” filtered by thing\_reviewed = This Product.

Creating Reviews

Build a simple form:

• A star input (you can use icons or a dropdown) saved as number.
• A multiline input for the comment.
• A button “Submit Review”.

Workflow on button click: Create a new Review with fields:

// Bubble “Create a new thing” fields
rating = StarInput’s value
comment = CommentInput’s value
author = Current User
thing_reviewed = Current Page Product

Showing Reviews

Use a Repeating Group with type Review and data source:

// Search for all reviews of current product
Search for Reviews
  constraint: thing_reviewed = Current Page Product
  sorted by created date descending

Inside the cell, show Current cell’s Review’s rating and comment.

Average Rating

Add a text element wherever you want the overall rating:

// Bubble expression for average rating
Search for Reviews:average's rating

Bubble automatically averages the number field.

Privacy Rules

• Anyone can view Review fields (if your app shows reviews publicly).
• Only This Review's author is Current User should be allowed to modify/delete.

This prevents users editing others’ reviews.