Validator Attributes

Used for validating properties. A property can have any number of validator attributes.

A validator has two shapes over one job. It either corrects the value, as min_value / max_value does, or it rejects it and draws a message beside the property, as require does.

Note

Validators run before a property’s widget is built, and again across every visible property on every inspector edit, so a property whose bound reads another property re-validates when that one changes. They do not run on a property hidden by show_if / hide_if.

• min_value / max_value
• require