Data binding and variables

Bind Components, Extract and Pass data throughout your App

Applies to Classic App Builder. Screens and recordings in this section show the Classic interface.

Binding connects a source value to a component, query, page parameter, or action input.

Understand the flow

Selecting a different row should update the dependent value. Passing a displayed field and passing a stable record identifier are different choices; use the value required by the target.

Start with an example

• Binding components explains Bind and Functions.

• Connect a table to an edit form follows a selected record into a form.

• Connect a filter to a table narrows visible results.

• Bind related tables connects related data.

• Extract and pass values covers component and page values.

• Variables stores values used by app logic.

• Bindings across pages and across overlays cover navigation boundaries.

Verify a binding

Check the source component, selected record, field, and value type. Test a second selection, an empty selection, and a missing value. For writes, inspect the record identifier separately from the form's editable fields.

If the value is correct but the operation fails, investigate the action and its inputs.