Symfony 4 Doctrine multiple table joins in one property - mysql

Question

Very new to symfony and Doctrine. I have the following tables in my database.
mo_user
id | email | password
__________________________________
9144 | summer#h.com | !password!
mo_user_role
user_id| role_id
_________________
9144 | 5
mo_permission
id | namespace | name | description
______________________________________________
1 | admin | - | -
2 | users | - | -
3 | view_summary_report | - | -
4 | view_user_statement | - | -
mo_role_permission
role_id | permission_id
________________________
5 | 3
5 | 4
I am trying to return an array of the permissions of the current user in this case user with id = 9144 which should be array('view_summary_report','view_user_statement').
I have mapped all the tables to their corresponding entity classes. and in MoUser.php entity class which corresponds to mo_user table, I have a
permissions method which should return the array but my join from annotations is failing,
My getPermissions() method in MoUser.php
/**
* #var Collection|MoPermission[]
* #ORM\ManyToMany(targetEntity="App\Entity\MoPermission")
* #ORM\JoinTable(
* name="mo_user_role",
* joinColumns={#ORM\JoinColumn(name="user_id",referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="role_id",referencedColumnName="id")}
* )
*/
private $permissions;
public function getPermissions()
{
$currentPermissions = array();
foreach ($this->permissions->toArray() as $index => $permission) {
$currentPermissions[] = $permission->getNamespace();
}
//Return default role if Roles are not assigned to this user.
if(count($currentPermissions)>0) {
return $currentPermissions;
} else {
return array('DEFAULT_PERMISSION');
}
}
So I figured out the raw sql to achieve what I wanted which is below, but I would like to know the Symfony/Doctrine annotated way of achieving the following raw SQL.
SELECT t0.id AS id_1, t0.namespace AS namespace_2, t0.name AS name_3, t0.description AS description_4
FROM mo_permission t0
LEFT JOIN mo_role_permission ON t0.id = mo_role_permission.permission_id
LEFT JOIN mo_user_role ON mo_role_permission.role_id = mo_user_role.role_id
WHERE mo_user_role.user_id = 9144;

Answer 1

I don't think there is a proper way to achieve what you're trying to do directly through property annotations with your current setup.
You could achieve what you want with one of these solution though :
One of mo_user_role and mo_role_permission is not needed, since none of them have additional field. You should just have a mo_user_permission table generated by a ManyToMany relationship between MoUser and MoPermission, which would grant you direct access to MoPermission from MoUser's getPermissions()
Another way would be to create a service which would have a GetPermissionsFromUser(MoUser $moUser) method (for example), calling the proper query from the entity's repository, which you would call when needed.
You could still achieve what you want in your getPermissions() method with your current setup, but you would have to loop through each relation's items to build your new result array manually.
e.g. for last point :
public function getPermissions() {
$permissions = [];
foreach($this->roles as $role) {
foreach($role->getPermissions() as $permission) {
permissions[] = $permission->getNamespace();
}
}
return $permissions;
}
This would assume you have a MoRole entity, which would make sense regarding your current setup, but you didn't mention it. Otherwise, same logic could still be applied though, it's just a naming matter.

Answer 2

I'm pretty sure that you could do that query using Doctrine (and a QueryBuilder) like...
use Doctrine\ORM\EntityRepository
class PermissionRepository extends EntityRepository
{
//....
/**
* #param UserInterface $user
* #return array|Permission[]
*/
public function getPermissionsForUser(UserInterface $user)
{
$queryBuilder = $this->createQueryBuilder('permission');
/**
* permissions will be in a multi-dimensional array
* with a single key per array of 'namespace'
*/
$permissions = $queryBuilder
->select('permission.namespace')
->join('permission.role', 'role')
->join('role.user', 'user')
->where($queryBuilder->expr()->eq('user', ':user'))
->setParameter('user', $user)
->getQuery()
->getArrayResult();
if (count($permissions) > 0) {
/**
* If there are any permissions found just return
* the 'namespace' property from each "sub-array"
*/
return array_column($permissions, 'namespace');
}
return ['DEFAULT_PERMISSION'];
}
//...
}
And then you would call it like..
$permissions = $repository->getPermissionsForUser($user);