use NotNull instead of NotBlank

[xabbuh]

Since we have the Type constraint enforcing strings and the Length constraint ensuring that the empty strings are rejected, wouldn't it be more sensible to use the more strict NotNull constraint?

[OskarStark]

But if we enforce a string it’s clear it cannot be null, or?

[xabbuh]

The TypeValidator won't do anything if we pass null: https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Validator/Constraints/TypeValidator.php#L32-L34

[javiereguiluz]

Thank you Christian.