README

In order to simplify request validation and reduce amount of boilerplate, this package provides you set of additional constraints.

Json and FixedJson constraints

If you are dealing with json requests, you probably hate Collection validator. As a replacement this library provides you two additional constraints: JsonValidator and FixedJsonValidator.

The difference between JsonValidator and FixedJsonValidator, which is both extends from CollectionValidator, is that they use different value for option allowExtraFields. FixedJson doesn't allow extra fields, but Json - just ignores that.

Shortcuts

This validator provides you some shortcuts for common validators:

$rules = new FixedJson([
    'foo' => 'string',
    'bar' => 'email',
    'buz' => 'datetime',
]);

this is equivalent of

$rules = new Collection([
    'foo' => [new NotNull(), new Type('string')],
    'bar' => [new NotNull(), new Email()],
    'buz' => [new NotNull(), new DateTime()]
]);

List of available shortcuts:

Null Safety

By default all constraint (except null) shortcuts expands with NotNull constraint. If null is acceptable value for you, you can just add question mark at the beginning of shortcut. So this rules will be equivalent:

$rules = new Json([
    'foo' => '?string',
    'bar' => 'string'
]);

$equivalent = new Collection([
    'allowExtraFields' => true,
    'fields' => [
        'foo' => [new Type('string')],
        'bar' => [new NotNull(), new Type('string')]
    ]
]);

The syntax is taken from PHP 7.1

Optional fields

If your json request has optional keys, then you probably will write something like this:

$rules = new Collection([
    'foo' => new Optional([new NotNull(), new Type('string')])
]);

With JsonValidator the same rule can be written as:

$rules = new Json([
    'foo?' => 'string'
]);

Please note that question mark (?) will be skipped if you manually provide info about is this field is required or not. So using this rule:

$fules = new Json([
    'foo?' = new Required([new NotNull()]),
    'bar??' => 'string',
])

validator will expect foo? containing not null value. And property bar? considered as optional since it has question mark in it's end (?).