Validation

Field and form validation. A ValidationRule checks a value and reports a ValidationResult — the building blocks behind a field’s rules= and Form.validate().

For a task-oriented introduction — built-in rules, triggers, custom rules, whole-form validation — see the Validation guide.

ValidationRule	A single validation rule that can be applied to a string value.
ValidationResult	The outcome of a single validation check.

Rule types

The rule names accepted by ValidationRule and a field’s add_validation_rule.

type bootstack.validation.RuleType

A built-in validation rule name — 'required', 'email', 'pattern', 'stringLength', 'custom', 'compare'.