how should I implement validation on my non

Doctrine entities have validation metadata specified on their member fields independently of forms. Symfony2's form system somehow uses the validators provided by the entity.

How does that work? What ties it all together?

I have a non-doctrine model which I would like to validate without forms, but when I use forms they should use that validation information and display it correctly. So I need to:

Define validators on a non-doctrine object

Define validators without annotations

Allow the model to validate itself without a form

Allow forms to use the validators on the non-doctrine object

---

Not sure if it handles your situation (as no code for a non-doctrine entity is provided), but you can use symfony validation constraints on values and arrays of values:

Validation

As an example of validating a couple of date values in array:

private function isInvalid($data)
{
    $response = array();
    $constraint = new Collection(array(
                'from'=>new Date(),
                'to'=>new Date(),
            ));

    $validationList = $this->get('validator')->validateValue($data, $constraint);

    if(count($validationList)>0) {
        foreach($validationList as $err) { 
            array_push($data,array(
                'field'=>$err->getPropertyPath(),
                'message'=>$err->getMessage(),
            ));
        }
        return $response;
    }
    return false;
}

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