Nullable values

Allow null explicitly and distinguish it from an absent object field.

Nullables

Use the nullable() method to create a nullable schema. This method allows you to validate and transform nullables.

Nullables are a bit special in Acanthis. They are not a type, but a modifier. You can use them with any type to make it nullable.

string().nullable(defaultValue: 'default');
number().nullable(defaultValue: 5);
boolean().nullable(defaultValue: true);
date().nullable(defaultValue: DateTime.now());
...

You can also validate the nullable type.

string().nullable().enumerated(['Acanthis', 'Dart']);

INFO

At the enumerated list will be added null and the default value if provided.

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