How to fetch Objects from Model/Service layer - service

Question

In an app we are developing, we have Services, Mappers and Entities. We are not using an ORM. In the app, we have Group, GroupMember & Member entities. The GroupMember entity has the groupId, memberId & memberAccess properties. The memberAccess fields tells us the access level of the Member within the Group. Now we need to fetch
all the Groups where a member has specific level of access. (by providing a memberId)
all the Groups where a member is a member along with his access. (by providing a memberId)
all the Members within a group with their access. (by providing a groupId)
any ideas which service(s) should be used for each of the following. and how they will interact to fetch the specific data.

Answer 1

1) MembershipMapper: implement your queries here returning arrays of entities (have a look at ZfcBase\Mapper\AbstractDbMapper as base class)
function getGroupsForMember($member, $access = null)
function getMembersForGroup($group, $access = null)
2) MembershipServive: in Module.php under getServiceConfig you add this service to the service manager. Use a closure to create a new MembershipService and inject a MembershipMapper into it. The groups/members functions will probably just be proxies to the mapper.
function setMembershipMapper($membershipMapper)
function getMembershipMapper()
function getGroupsForMember($member, $access = null)
function getMembersForGroup($group, $access = null)
3) Controller: inject your MembershipService into your controller (you can do this in the same way you create your services with a closure). Then call the methods on the service.
Example for creating a service/mapper/controller in the service/controller manager (goes in Module.php)
public function getServiceConfig()
{
return array(
'factories' => array(
'MembershipService' => function (Zend\ServiceManager\ServiceManager $sm) {
$service = new YourNS\Service\Membership();
$service->setMembershipMapper($sm->get('MembershipMapper'));
return $service;
},
'MembershipMapper' => function ($sm) {
$mapper = new \YourNS\Mapper\Membership();
return $mapper;
},
);
}
public function getControllerConfig()
{
return array(
'factories' => array(
'YourNS\Controller\Something' => function (Zend\Mvc\Controller\ControllerManager $cm) {
$controller = new YourNS\Controller\Something();
$controller->setMembershipService($cm->getServiceLocator()->get('MembershipService'));
return $controller;
},
}