Add brands through company, it's possible? How?

Question:

I have this two tables (see pics below) mapped as follow:

class Brand
{
    ...

    /**
     * @var Company
     *
     * @ORM\ManyToOne(targetEntity="Company")
     * @ORM\JoinColumn(name="companies_id", referencedColumnName="id")
     */
    protected $company;

}

class Company
{
    ...  
}

I need to add support for add a new Brand from Company but I have not idea in how to achieve this. This are handled through SonataAdminBundle but I think I need to add something else to entities in order to create brands from company but I am not sure what this would be, can I get some help? I am stucked

1st attempt

After get an answer this is how I modify Company entity:

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

class Company
{
    ...

    /**
     * @var Brand
     * @ORM\OneToMany(targetEntity="Brand", mappedBy="company", cascade={"persist"})
     **/
    protected $brands;

    public function __construct()
    {
        $this->brands = new ArrayCollection();
    }

    ...

    public function getBrands()
    {
        return $this->brands;
    }

    /**
     * Add brands
     *
     * @param Brand $brand
     * @return Brands
     */
    public function addBrand( Brand $brand)
    {
        $this->brands[] = $brand;
        return $this;
    }

    /**
     * Remove brands
     *
     * @param Brand $brand
     */
    public function removeBrand( Brand $brand)
    {
        $this->brands->removeElement($brand);
    }
}

But I am getting this error:

No entity manager defined for class Doctrine\Common\Collections\ArrayCollection

Why is that?

You could try setting up your entities like this:

class Brand
{
    /**
     * @var Company
     *
     * @ORM\ManyToOne(targetEntity="Company", inversedBy="brands")
     * @ORM\JoinColumn(name="companies_id", referencedColumnName="id")
     */
    protected $company;
}

class Company
{
    /**
     * @var ArrayCollection
     *
     * @OneToMany(targetEntity="Brand", mappedBy="company", cascade={"persist"})
     **/
    protected $brands;
}

What we're defining here is that new Brands can be created from the Company entity with cascade={"persist"}.

It's recommended you implement addBrand and removeBrand in Company for direct interaction with the ArrayCollection.

A simple example of the final functionality:

$company = $service->getCompany(1); // our company entity

$brand = new Brand();
$brand->set...
...

$company->addBrand($brand);

$entityManager->persist($company);

EDIT

This is just an example, you may choose not to add with keys or even implement a remove function, but this is a starting point:

public function addBrand(Brand $brand)
{
    // key needs to be something that can uniquely identify the brand
    // e.g. name
    $this->getBrands()->set(*key*, $brand);

    return $this;
}

public function removeBrand($key)
{
    $this->getBrands()->remove($key);

    return $this;
}

Related:

how to escape php code in echo with javascript

WooCommerce seems to only orderby date and not price

Pull information from SQL database and getting login errors

How can I replace the white rectangle within an image using ImageMagick?

Cant submit form

When I click to the next page on pagination,it goes to 404 error in codeigniter

Laravel Interfaces

How can we validate multiple fields with one validation in cakePHP 2.0?

Include both local and server at the same time

WooCommerce: How to display Category Name in single-product.php

Php Mysql Query not working properly

compare today's date with unix timestamp value in database

$http.get returns actual php script instead of running it (yeoman, grunt)

Mixing

Codeigniter PHP Mailer, Sender Info

PHP Regular Expressions Counting starting consonants in a string

PHP / MySQLi: How to prevent SQL injection on INSERT (code partially working)

How to register global variable for my Laravel application?

How to search images by name inside a folder?

how to multiply two column names using codeigniter validation rule

Wordpress End If Statements

How to modify CodeIgniter calendar to handle multiple events per day?

How to secure configuration file containing database username and password

How to Match a string with the format: “20959WC-01” in php?

mysql_real_escape_string creates \ in server only not in local

Wordpress log out using URL and redirect to specify page

Is it a good practise store the checkout steps fields in php $_SESSION?

MySQL Query returning strange values

Laravel 4.2 Sending email error

Rewrite url not working in htaccess

php include capitalization on files

Error connecting to MSSQL using PHP

Dynamically select from a dynamically generated dropdown

Time format conversion with PHP

access the json encoded object returned by php in jquery

Click on link next link should be display on same page

Jquery parsley validate not working

RecursiveIteratorIterator to fetch subdirectories

Trying to rewrite mysql_* to pdo

php redirection working in chorme but not on firefox

What are correct permissions for Linux Apache2 PHP 5.3 log file?

How do I display my mysql table column headers in my php/html output?

array and function php

Unable to configure Symfony (3rd party) bundle

How to pass a value from a page to another page in PHP

Composer dump-autoload gives preg_match error

Symfony 2 unable to pass entity repository to form

Why am getting this error?: Unknown column 'firstname' in 'field list'