Field specific errors on repeated field - php

Question

I am required to display errors under specific fields depending on the situation. In my case there can be two. Which are Password is empty and Passwords do not match. Currently all the messages gets displayed under the password.second field.
I need to display Password is empty error under the password.first field and Passwords don not match under the password.second field.
I tried to generate the errors separately via {% for error in form.password.first.vars.errors %} and {% for error in form.password.second.vars.errors %} but failed as the two error messages I require only gets rendered when I use {% for error in form.password.vars.errors %}. I have been at this for quite a while and returned empty handed. The implementation is as follows,
I am using a repeated field to implement the password and confirm password as follows,
$builder->add( 'password', 'repeated', array( 'type' => 'password','required' => true, 'invalid_message' => ErrorMessages::PASSWORDS_DO_NOT_MATCH, 'options' => array('attr' => array('class' => 'password-field form-control')),'first_options' => array('label' => false,'error_bubbling' => true,'label_attr'=>array('class'=>'col-sm-4 control-label')),'second_options' => array('label' => false,'label_attr'=>array('class'=>'col-sm-4 control-label'))));
And the password entity validation is as follows,
class User implements UserInterface, \Serializable {
/**
* #Assert\Email(message=ErrorMessages::EMAIL_ADDRESS_INVALID)
* #Assert\NotBlank(message=ErrorMessages::EMAIL_ADDRESS_EMPTY)
*/
private $email;
/**
* #Assert\NotBlank(message=ErrorMessages::PASSWORD_EMPTY, groups={"full"})
*/
private $password;
....
I render these two fields in the twig in the following manner,
<div class="form-group {% if form.password.vars.errors|length > 0 %}has-error{% endif %} {% if form.password.vars.required == 'true' %}required{% endif %}">
{{ form_label(form.password.first, "Password") }}
<div class="col-sm-8">
{{ form_row(form.password.first) }}
</div>
</div>
<div class="form-group {% if form.password.vars.errors|length > 0 %}has-error{% endif %} {% if form.password.vars.required == 'true' %}required{% endif %}">
{{ form_label(form.password.second, "Confirm password") }}
<div class="col-sm-8">
{{ form_row(form.password.second) }}
<span class="help-block">
{% for error in form.password.vars.errors %}
{{ error.messageTemplate|trans(error.messageParameters, 'validators')~'' }}
{% endfor %}
</span>
</div>
</div>

Answer 1

If you want to use the convenient repeated field, then you're probably stuck - the way repeated works is to duplicate, using a ValueToDuplicatesTransformer, the field you add into two fields containing the same data, and it ensures that they are the same at the point where the Transformer turns submitted form values back into model data (not using normal constraints). From validation's PoV, there is only one field, so you can't choose which textbox the error goes against.
But there may be other options if you want to sort it out yourself!
You could make a Custom Validation Constraint. To achieve the behaviour you're after I think you'll need it to be a Class Constraint Validator, so that it has access to both fields at once, and can compare them. However, that will again mean that the error gets applied at a higher level than you want, so probably won't work.
So probably the way is to manually test the fields in your Controller, and add the relevant error directly to the field with which you want it to be associated, something like the following. You need to split the password field into two so that you can test them against each other, so put the NotBlank constraint on the first field.
Controller
// ...
$password1 = $form->get('password1');
$password2 = $form->get('password2');
if ($password1->getData() != $password2->getData() )
{
$password2->addError(new FormError("Passwords do not match!") );
}
// ...