.finite()

Passes when value.isFinite is true. NaN, double.infinity and double.negativeInfinity are doubles, so they pass l.double() and l.num() unless .finite() is present. jsonDecode never produces them, but values computed in Dart can.

Signature

NumberValidator<N, O> finite({String? message, MessageBuilder? messageBuilder})

Parameters

Parameter	Type	Meaning
message	String?	Replaces the default error message.
messageBuilder	MessageBuilder?	Builds the message from the issue. message wins when both are given. See Message builders.

Issue

Code notFinite. Default message: value must be a finite number. value is replaced by the field name when there is one.

Code generation

No annotation adds .finite() yet. Apply it to the generated schema’s field by hand if you need it, or check it in a @WithCustomValidator.

Example

Hand-written

final price = l.double().finite();

Generated

bool isFinite(double value) => value.isFinite;

@WithCustomValidator(isFinite, message: 'must be finite') required double price,

price.validate(input)+1-2

1. +valid: 19.99
2. -invalid: double.nanvalue must be a finite number
3. -invalid: double.infinityvalue must be a finite number

Without .finite():

true
true