Symfony 2 Doctrine一对多不写连接表

Question

I am trying to create a one-to-many between tax_rates and countries , where one tax rate can have multiple countries associated with it, with a join table on the countries referencing the tax_rate with the following schema:

/** @Entity **/
class TaxRates
{
    ...

    /**
    * @ORM\OneToMany(targetEntity="Acme\DemoBundle\Entity\Country", mappedBy="tax_rate", cascade={"persist"})
    */
    protected $country;

    ...

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

/** @Entity **/
class Country
{
    /**
      * @ORM\ManyToOne(targetEntity="Acme\TaxBundle\Entity\TaxRates", inversedBy="country")
      * @ORM\JoinColumn(name="taxrate_id", referencedColumnName="id")
      */
    protected $tax_rate;
}

I have the following in my Symfony form from the TaxRates with the country being included as a Entity Type:

$builder->add('country', 'entity', array(
                'class' => "AcmeDemoBundle:Country",
                'property' => "name",
                "multiple" => true,
            ))

When I load into the form, enter valid data and then submit it, it writes correctly into the TaxRates table. However it does not add the id into the join table on the countries so I have a record, with nothing referencing it.

If anyone could advise on what I'm doing wrong that'd be fantastic, thank you.

Answer 1

It's just a guess but I suspect you are not calling $country->setTaxRate. Do something like:

class TaxRates {
  function addCountry($country) {
    $this->countries[] = $country;
    $country->setTaxRate($this); // This is what might be missing