README

This Collection knows about their parent and sets it on an item when adding, .i.e:

$collection = $foo->getBars(); 
$collection->add($bar); // behind the scenes: $bar->setFoo($foo);

This way you can manage this relation via Symfony Forms without the ugly by_reference and addBar()/removeBar() methods.

Requirements

You need to either:

• wrap an initialized PersistentCollection with PeristentAssociationRelationCollection — works out of the box
• use RelationCollection and tell it how to set the owner of an object using a closure. the former does this automatically basing on mapping information retrieved from PersistentCollection

Why?

Because I don’t want to write adders/removers boilerplate for every relation. And also because of reasons.

Example usage

With existing doctrine relations

<?php

use Nassau\RelationCollection\PersistentAssociationRelationCollection;

/**
 * @ORM\Entity
 **/
class Foo {

    /**
     * @var Bar[]
     * @ORM\OneToMany(targetEntity="Bar", mappedBy="foo", cascade={"all"}, orphanRemoval=true)
     **/
    private $bars;
   
    public function getBars() {
        return new PersistentAssociationRelationCollection($this->bars);
    }
    
    public function setBars($bars) {
        // noop, handled by reference, $this->getBars()->add($bar);
    }
}

Manually

<?php

use Nassau\RelationCollection\RelationCollection;

class Foo {

    private $bars;
   
    public function __construct() {
        $this->bars = new RelationCollection(function (Bar $bar) {
            $bar->setFoo($this);
        });
    }
    
    public function getBars() {
        return $this->bars;
    }
    
}

class Bar {
    /** @var Foo */
    private $foo;
    
    public function setFoo(Foo $foo) {
        $this->foo = $foo;
    }
}

$foo = new Foo;

$foo->getBars()->add(new Bar);