integrity constraint violation 1062 with ORM and Symfony2 - php

Question

I have an Entity with a primary key like this:
/**
* #var integer
*
* #ORM\Column(name="product_id", type="integer", nullable=false)
* #ORM\Id
*/
protected $productId;
....
/**
* Set productId
*
* #param integer $productId
* #return Products
*/
public function setProductId($productId)
{
$this->productId = $productId;
return $this;
}
/**
* Get productId
*
* #return integer
*/
public function getProductId()
{
return $this->productId;
}
But when I try to insert an ProductId with set method, I get this error:
integrity constraint violation 1062 duplicate entry '0' for key 'primary'
I tried with * #ORM\GeneratedValue(strategy="NONE") but the result it's the same, I need to set the Product Id because the sequence isn't 1, 2, 3... is different.
And I can't create a new Id because my current ProductId is used by other entities like Foreing Keys.
Any solution?
Thanks in advance.
-----Edit with the file where I have the error-----
$prod = new Products();
$prod->setProductId("65");
$manager->persist($prod);
$manager->flush();
----Edit with whole Entity----
namespace My\WebBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
class Products
{
/**
* #var integer
*
* #ORM\Column(name="product_id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="NONE")
*/
protected $productId;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=50, nullable=false)
*/
private $name;
/**
* #var integer
*
* #ORM\Column(name="version", type="integer", nullable=true)
*/
private $version;
/**
* #var string
*
* #ORM\Column(name="code", type="string", length=10, nullable=false)
*/
private $code;
/**
* #var integer
*
* #ORM\Column(name="price", type="integer", nullable=false)
*/
private $price;
/**
* Set productId
*
* #param integer $productId
* #return Products
*/
public function setProductId($productId)
{
$this->productId = $productId;
return $this;
}
/**
* Get productId
*
* #return integer
*/
public function getProductId()
{
return $this->productId;
}
/**
* Set name
*
* #param string $name
* #return Products
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set version
*
* #param integer $version
* #return Products
*/
public function setVersion($version)
{
$this->version = $version;
return $this;
}
/**
* Get version
*
* #return integer
*/
public function getVersion()
{
return $this->version;
}
/**
* Set code
*
* #param string $code
* #return Products
*/
public function setCode($code)
{
$this->code = $code;
return $this;
}
/**
* Get code
*
* #return string
*/
public function getCode()
{
return $this->code;
}
/**
* Set price
*
* #param integer $price
* #return Products
*/
public function setPrice($price)
{
$this->price = $price;
return $this;
}
/**
* Get price
*
* #return integer
*/
public function getPrice()
{
return $this->price;
}

Answer 1

When using no identifier generation strategy you should not forget that you have to assign the custom ID before you call EntityManagers persist() method.
I think you are persisting the new Entity before assigning the custom ID which means your $productId property is set to null and will be casted to 0 (zero) if you try to flush it. That will cause your error.
Doctrine Doc

Answer 2

Marcus post a good answer to your problem. You can solve it by adding id into you Entity, and use productId as secondary key.
Add id and set it to Auto increment, like
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
Then you can use your productId with:
/**
* #var integer
*
* #ORM\Column(name="product_id", type="integer", nullable=false)
*/
protected $productId;
With this solution you will use $productId as secondary key. Don't forget to clear data in your table.
You also have an error here:
$prod->setProductId(65);
Now you try set data which is string - in your table is integer.