Symfony 2.5.6 breaking login? - symfony

Question

I'm following the login/security conventions, everything ok with Symfony 2.3 to 2.55 , until I updated to 2.5.6. Now the Login url is displaying:
Neither the property "_username" nor one of the methods "getUsername()", "username()", "isUsername()", "hasUsername()", "__get()" exist and have public access in class "Acme\DemoBundle\Entity\Login".
Any idea to solve this?
namespace Acme\DemoBundle\Entity;
class Login {
protected $_username;
protected $_password;
protected $_remember_me;
public function get_Username() {
return $this->_username;
}
public function set_Username($username) {
$this->_username = $username;
}
public function get_Password() {
return $this->_password;
}
public function set_Password($password) {
$this->_password = $password;
}
public function get_RememberMe() {
return $this->_remember_me;
}
public function set_RememberMe($remember) {
$this->_remember_me = $remember;
}
}

Answer 1

The name of the fields is configurable. You can change _username and _password fields to anything you want and set them in security.yml. For example as I use custom LoginType (alias login_form), I have this in security.yml:
security:
firewalls:
secured_area:
username_parameter: login_form[username]
password_parameter: login_form[password]
This allows me to have $username and $password variables in the Login Model.

Answer 2

Symfony standard Login needs that you submit a _username and _password named inputs.
Initially my entity user properties were username and password.
Unfortunately I found that twig rendered the inputs ignoring the attr{name='_username'} sent from the formtype builder. So I took the shortcut of renaming the entities properties to the underscore version.
Then everything worked fine until I updated Symfony to 2.5.6 version.
Then as Cerad suggested, I got rid of the entity underscores and form id... but still needed to pass the input names with the underscores. So I overrode this Wig block, just changing the name assignation from the first line to the last one:
{% block widget_attributes -%}
id="{{ id }}"
{%- if read_only %} readonly="readonly"{% endif -%}
{%- if disabled %} disabled="disabled"{% endif -%}
{%- if required %} required="required"{% endif -%}
{%- for attrname, attrvalue in attr -%}
{{- " " -}}
{%- if attrname in ['placeholder', 'title'] -%}
{{- attrname }}="{{ attrvalue|trans({}, translation_domain) }}"
{%- elseif attrvalue is sameas(true) -%}
{{- attrname }}="{{ attrname }}"
{%- elseif attrvalue is not sameas(false) -%}
{{- attrname }}="{{ attrvalue }}"
{%- endif -%}
{%- endfor -%}
name={{full_name}}
{%- endblock widget_attributes %}