Reference setting value in entity symfony - symfony

Question

I have a doubt about code organization using symfony3 and doctrine: I'll try to explain as clear as I can. Let's say I have a FootballClub entity:
class FootballClub
{
// other code
private $memberships;
public function addMembership(Membership $membership) : FootballClub
{
$this->memberships[] = $membership;
return $this;
}
public function removeMembership(Membership $membership) : bool
{
return $this->memberships->removeElement($membership);
}
}
The entity is in a many-to-one relationship with another entity, Membership, which represents the contract a player has with the club. Let's say each club
has only a limited number of membership it can acquire, number that is represented as a setting, for example, as a property in a Setting entity.
The question is: how should I reference that setting when removing a membership from the club and check that is respected? Entities should not have any dependency, so what would be the correct way to implement this? A service? can you provide an example? Thank you for your time.

Answer 1

You could create a Settings entity, linked in OneToOne relation with FootballCluc entity.
Define Settings like this and instanciate it in the FootballClub's constructor
Settings entity
/** #Entity */
class Settings
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="integer")
*/
private $maxMembership;
// Other configurable properties ...
__constructor($maxMembership = 50)
{
$this->maxMembership = $maxMembership;
}
public function getMaxMembership()
{
return $this->maxMembership;
}
public function setMaxMembership($maxMembership)
{
$this->maxMembership = $maxMembership;
}
}
Football Entity
class FootballClub
{
/**
* One FootballClub has One Settings.
* #OneToOne(targetEntity="Settings")
* #JoinColumn(name="settings_id", referencedColumnName="id")
*/
private $settings;
// other code
private $memberships;
__constructor(Settings $settings = null)
{
if (null === $settings) {
$settings = new Settings();
}
$this->settings = $settings;
}
public function addMembership(Membership $membership) : FootballClub
{
if ($this->settings->getMaxMembership() <= count($this->memberships)) {
// throw new Exception("Max number of membership reached"); Strict mode
// return false // soft mode
}
$this->memberships-> = $membership;
return $this;
}
public function removeMembership(Membership $membership) : bool
{
return $this->memberships->removeElement($membership);
}
}