Data Type

A data type in Bubble is a category of information your app stores. Think of it like a table in a spreadsheet: it defines what kind of object you are saving, such as a user, a product, or an appointment.

Every Bubble app is built on data types. They are the building blocks of your database, and every feature your app has will connect back to one or more of them.

Key Takeaways

• Core structure: A data type is the blueprint for every record of that kind stored in your Bubble database.
• Fields define properties: Each data type has fields that describe its attributes, like a product's name, price, or image.
• Relationships between types: One data type can reference another, letting you model complex real-world relationships.
• Built-in User type: Bubble includes a default User data type that powers all authentication and account features automatically.

What is a Data Type in Bubble?

A data type in Bubble is a named category for a group of related records. It acts like a database table. Each record created from that type shares the same field structure. Examples include User, Product, Order, or Message.

When you define a data type, you are telling Bubble what kind of thing you want to store.

• Data type name: Should be singular and descriptive, such as "Product" rather than "Products" or "items."
• Automatic fields: Bubble adds a unique ID, creation date, and creator field to every data type automatically.
• Custom fields: You add fields for the specific information each record of that type needs to hold.

Data types are defined in the Data tab of the Bubble editor. Getting the naming and structure right early avoids confusion throughout the project.

How Data Types Work in Bubble

Data types in Bubble store records in a cloud-hosted database. Each record is a single instance of that type, holding values for every field you defined. Workflows create, update, and delete records. Elements display them.

When a user submits a form, a workflow creates a new record of a data type with the submitted field values.

• Record creation: Workflows use "Create a new thing" to add a record of any data type to your database.
• Record reference: One data type can hold a field of another type, creating a link between the two records.
• List fields: A field can store multiple references to another data type, modeling one-to-many relationships cleanly.

Understanding how Bubble's database handles relational data helps you model real-world scenarios like orders belonging to users.

Why Data Types Matter for No-Code Apps

Data types determine how your whole app is structured. A well-designed set of data types makes every feature easier to build. A poorly designed one causes cascading problems in workflows, page logic, and performance.

The data model is the most important architectural decision in any Bubble app. Everything else is built on top of it.

• Feature clarity: Clear data types make it obvious what each workflow should create, update, or delete.
• Query performance: Well-structured types with proper fields let Bubble search and filter records efficiently.
• Scalability: A clean data model handles thousands or millions of records without needing to be redesigned.

If your data types are messy or overlapping, workflows become hard to maintain and pages become slow. Planning the model first is the right approach.

Common Data Type Mistakes in Bubble

The most common mistakes are creating too many data types for simple things, storing everything in one flat type, or forgetting to link types to each other when a relationship clearly exists.

Three patterns cause most data model problems in Bubble apps.

• Over-splitting: Creating a separate data type for something that could simply be a field or option set adds unnecessary complexity.
• Flat models: Storing unrelated information in one data type instead of using relationships makes queries harder and slower.
• Missing links: Forgetting to reference related types forces you to duplicate data or write overly complex workflows.

Taking 30 minutes to sketch your data types before building in Bubble will save hours of rework. Many experienced Bubble developers call this the most valuable step in any project.

Conclusion

Data types are the foundation of every Bubble app. They define what your app stores, how records relate to each other, and how your workflows and pages function at the core level. Getting the data model right early is what allows your app to grow without breaking. At LOW/CODE Agency, we've helped 450+ clients build and scale apps on Bubble and other no-code platforms. Our clients include global brands like Medtronic, American Express, Coca-Cola, Zapier, and Sotheby's.

Frequently Asked Questions

What is a data type in Bubble?

A data type is a category of records in your Bubble database, similar to a table, defining what kind of information each record holds.

How do I create a data type in Bubble?

Go to the Data tab in the Bubble editor, click "New type," give it a singular name, and start adding fields.

Can data types in Bubble reference each other?

Yes. A field in one data type can reference another type, creating a relational link between the two records.

Is the User data type customizable in Bubble?

Yes. Bubble's built-in User type comes with default fields, but you can add custom fields to it just like any other type.

How many data types should a Bubble app have?

It depends on the app, but most simple apps need between 5 and 15 data types. More complex platforms may need 20 or more.

What is the difference between a data type and an option set in Bubble?

A data type stores dynamic records created at runtime. An option set stores fixed, predefined values that do not change.