Null type

Ensure the field's value is null. This validator is useful for enforcing that certain fields must be explicitly null.

use Grape;

$validator = Grape::schema([
    "deleted_at" => Grape::null(),
]);

The null validator strictly enforces that a value must be null. This is different from simply being nullable - it requires the value to be explicitly null rather than just allowing null values.

You can use the following modifiers to mark the null field as required. Note that nullable() is not applicable since this validator inherently expects null values.
See Working with required and nullable for more details.

use Grape;

$validator = Grape::schema([
    "deleted_at" => Grape::null()->required(),
]);

Error Messages

Here are the default error messages for the null type:

[
    "null" => "The {field} must be null.",
]