How can public fields “break lazy loading” in Doctrine 2?

Question

When I run doctrine orm:validate-schema, it pops up a bunch of warnings about my mapped columns being public and not using getter/setter methods to wrap them. I

Answer 1

Note that Doctrine 2.4 now supports proxy objects for entites with public properties.

Marco Pivetta's website explains how it works:

class Customer {
    public $name;
    public $surname;
}

class CustomerProxy extends Customer {
    public function __construct(Customer $customer) {
        unset($this->name, $this->surname);
        $this->customer = $customer;
    }
    public function __set($name, $value) {
        $this->customer->$name = $value;
    }

    public function __get($name) {
        return $this->customer->$name;
    }
    // __isset, __unset, __clone, __sleep, __wakeup (or serialize/unserialize)
}