Doctrine2 multiple join - mysql

Question

I have problem with my User Entity. I have code generated by Doctrine it is below:
/**
* #var \Doctrine\Common\Collections\Collection
*
* #ORM\ManyToMany(targetEntity="Frontend\UserBundle\Entity\SfGuardPermission", inversedBy="user")
* #ORM\JoinTable(name="sf_guard_user_permission",
* joinColumns={
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
* },
* inverseJoinColumns={
* #ORM\JoinColumn(name="permission_id", referencedColumnName="id")
* }
* )
*/
protected $permission;
Problem is with join because I can't join user and permission. What I must to do? I must join sf_guard_user with sf_guard_user_group with sf_guard_grop with sf_guard_group_permission with sf_guard_permission. Because I need to get User permission. I do not no how to write join like this in code above. Is it possible?

Answer 1

You can not write this join in one annotation. In fact you gone have three entity tables sf_guard_user, sf_guard_group and sf_guard_permission and two cross tables which you can write as you already started, sf_guard_user_group and sf_guard_group_permission.
But since it looks like you try to migrate some symfony 1.x stuff to symfony 2.x:
The sf_guard_user_permisson table in symfony 1.x is a cross table between users and permission, containing extraordinaire permission for a user which are not granted through the groups the user is in, so you are already done.

Answer 2

SBH thx for replay, of course you have right with everything what you have written. But my sf_guard_user_permisson is empty so I can't use it. I can generate this table, this is no problem, but then I will must maintain it. This is next work for me so i wrote code below:
namespace Frontend\UserBundle\Entity;
// ...
/**
* #var \Doctrine\Common\Collections\Collection
*
*/
protected $permissions;
/**
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getPermissions()
{
$groups = $this->getSfGuardGroups();
foreach ($groups as $group)
{
$groupPermisions = $group->getPermission();
foreach ($groupPermisions as $groupPermision)
{
if (!in_array($groupPermision, $this->permissions)) {
$this->permissions[] = $groupPermision;
}
}
}
return $this->permissions;
}
/**
* #param string $permissionName
* #return boolean
*/
public function hasPermission($permissionName)
{
$this->getPermissions();
foreach ($this->permissions as $permission)
{
if($permission->getName() === $permissionName) {
return true;
}
}
return false;
}
// ..
What do you think about it? Your opinion is very important for me.
Edit:
Thx for SBH help, I have got answer for my question. I have hope it will help other people. If you do not understand something please look at SBH answer.