@check

The @check attribute in BAML adds validations without raising exceptions if they fail. This allows the validations to be inspected at runtime.

Usage

Field Check

class Foo {
  bar int @check(less_than_zero, {{ this < 0 }})
}

Block check

class Bar {
  baz int
  quux string
  @@check(quux_limit, {{ this.quux|length < this.baz }})
}

See Jinja in Attributes for a longer description of the Jinja syntax available in checks.

Benefits

• Non-Intrusive Validation: Allows for validation checks without interrupting the flow of data processing.
• Runtime Inspection: Enables inspection of validation results at runtime.

See more in validations guide.