The cause of the problem is that the add() method, defined in "vendor/sonata-project/doctrine-orm-admin-bundle/Sonata/DoctrineORMAdminBundle/Model/ModelManager.php line 560" received a two dimensional array object instead of a simple array.
Let's take a look at the `User.php`:
//src/Enstb/Bundle/VisplatBundle/Entity/User.php
public function getRoles()
{
return $this->roles->toArray();
}Well, what we can do? One of the possible solutions is making a new name for roles, in our case is `rolesCollection`, to let us configure a different return type.
//src/Enstb/Bundle/VisplatBundle/Administrator/UserAdmin.php
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper
//...
->add('rolesCollection','entity',array(
'class' => 'EnstbVisplatBundle:Role',
'property'=>'name',
'expanded' => true,
'compound' => true,
'multiple' => true,
'by_reference' => false
));
}//src/Enstb/Bundle/VisplatBundle/Entity/User.php
public function addRolesCollection($role){
$this->addRole($role);
}
public function removeRolesCollection($role){
$this->removeRole($role);
}
public function getRolesCollection()
{
return $this->roles;
}
public function setRolesCollection($roles)
{
if (count($roles) > 0) {
foreach ($roles as $role) {
$this->addRole($role);
}
}
return $this;
}//src/Enstb/Bundle/VisplatBundle/Entity/User.php
public function addRole(\Enstb\Bundle\VisplatBundle\Entity\Role $role)
{
if(!in_array($role,$this->getRoles())){
// Link each role with the user
$role->addUser($this);
$this->roles->add($role);
}
return $this;
}