Validation considerations in Laravel 5.4
Laravel 5.4 introduces two new built-in middleware
TrimStrings, the first middleware transforms request parameters with empty
string as a value to
null, the latter trims the leading and trailing white space from the values of request parameters.
So for example if we have
?firstname.lastname@example.org, in laravel 5.3 the value of "age" would be an empty string
"" and the value of "email" would be
but in laravel 5.4 the value of "age" would be
null and the value of "email" would be
Notice the leading space in the email value when we test using laravel 5.3
Considerations while using the Validator
While using the validator in laravel 5.4, you should put in mind that empty strings passed from a request object will be converted to null, that means the following rule will fail:
"age" => "integer"
That's because the value of age from the previous example is
null, in order to make it pass you need to add the
nullable flag to your rules set:
"age" => "nullable|integer"
If you decided to use the
ConvertEmptyStringsToNull you need to make sure you use the
nullable flag on all your optional keys.