Validator.validate isn't filling the object name

[jbdeandrade]

Ao fazer a validação com o validator.validate da seguinte forma:

public void adicionarForm(Filial filial) {
     validator.validate(filial);  

    //
}

não é possível capturar o erro na view da utilizando:

${errors.from('filial.nomeFantasia')}

[garcia-jj]

I'll answer for this issue in english because its our default language to talk here.

This is not a bug, but an expected behavior because using manual validation we can't discovery the name of instance you trying to validate. I'll explain.

In the automatic validation we can easily discovery the parameter name using Paranamer. If you have a controller method called void add(User user), we know that the parameter name is user, because the code is compiled with this meta information.

In the manual validation you call the method with signature Validation.validate(Object object). So we can discovery that the parameter name is object, but we can't discovery the name of instance object you pass as argument. Using this code as example:

public void add(User user, User anotherUser) {
    validation.validate(user);
    validation.validate(anotherUser);
}

In runtime there is no way to discovery that the instance passed to validate method is instance. And neither for the second argument.

May we can add a method validate(String alias, Object objectToValidate) to allow users to define an alias to prepend in category name, but this can breaks backwards compatibility, because we are adding a new method in an interface, and users who migrates to the new version will have problems.

@lucascs @Turini What you think about this case?

Note: I'll change the issue title to allow a better explanation about the case

[lucascs]

👍 to add the validate with alias on the next major version

[Turini]

indeed