added test case for #169

tests/Integration/ManyToManyRelationshipTest.php

@@ -12,6 +12,7 @@
 namespace GraphAware\Neo4j\OGM\Tests\Integration;
 
 use GraphAware\Neo4j\OGM\Tests\Integration\Models\ManyToManyRelationship\Group;
+use GraphAware\Neo4j\OGM\Tests\Integration\Models\ManyToManyRelationship\Permission;
 use GraphAware\Neo4j\OGM\Tests\Integration\Models\ManyToManyRelationship\User;
 
 /**
@@ -63,6 +64,34 @@ public function testUserCanBeLoadedWithGroups()
         }
     }
 
+    public function testUserCanBeLoadedWithGroupsNested()
+    {
+        $user = new User('jim');
+        $group1 = new Group('owners');
+        $group2 = new Group('creators');
+        $perm1 = new Permission('delete');
+        $perm2 = new Permission('create');
+        $group1->getPermissions()->add($perm1);
+        $group2->getPermissions()->add($perm2);
+        $this->em->persist($group1);
+        $this->em->persist($group2);
+        $user->getGroups()->add($group1);
+        $user->getGroups()->add($group2);
+        $this->em->persist($user);
+        $this->em->flush();
+        $this->em->clear();
+
+        /** @var User $jim */
+        $jim = $this->em->getRepository(User::class)->findOneBy(['login' => 'jim']);
+
+        $this->assertEquals(2, $jim->getGroups()->count());
+        /** @var $permission Permission */
+        $permission = $jim->getGroups()->first()->getPermission();
+        $this->assertEquals(1, $permission->getGroups()->count());
+        $permission->getGroups()->first(); // trigger
+        $this->assertEquals(1, $permission->getGroups()->count(), 'groups count should not change after accessing groups permissions.');
+    }
+
     public function testUserCanHaveGroupAdded()
     {
         $user = new User('jim');

tests/Integration/Models/ManyToManyRelationship/Group.php

@@ -42,10 +42,26 @@ class Group
      */
     protected $users;
 
+    /**
+     * @OGM\Relationship(type="HAS_PERMISSION", direction="OUTGOING", mappedBy="groups", collection=true, targetEntity="Permission")
+     *
+     * @var Collection|Permission[]
+     */
+    protected $permissions;
+
+    /**
+     * @OGM\Relationship(type="HAS_PERMISSION", direction="OUTGOING", mappedBy="groups", collection=false, targetEntity="Permission")
+     *
+     * @var Permission
+     */
+    protected $permission;
+
+
     public function __construct($name)
     {
         $this->name = $name;
         $this->users = new Collection();
+        $this->permissions = new Collection();
     }
 
     /**
@@ -72,6 +88,22 @@ public function getUsers()
         return $this->users;
     }
 
+    /**
+     * @return Collection|Permission[]
+     */
+    public function getPermissions()
+    {
+        return $this->permissions;
+    }
+
+    /**
+     * @return Permission
+     */
+    public function getPermission()
+    {
+        return $this->permission;
+    }
+
     /**
      * @param string $name
      */

tests/Integration/Models/ManyToManyRelationship/Permission.php

@@ -0,0 +1,83 @@
+<?php
+
+/*
+ * This file is part of the GraphAware Neo4j PHP OGM package.
+ *
+ * (c) GraphAware Ltd <info@graphaware.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace GraphAware\Neo4j\OGM\Tests\Integration\Models\ManyToManyRelationship;
+
+use GraphAware\Neo4j\OGM\Annotations as OGM;
+use GraphAware\Neo4j\OGM\Common\Collection;
+
+/**
+ * Class Permission.
+ *
+ * @OGM\Node(label="Permission")
+ */
+class Permission
+{
+    /**
+     * @OGM\GraphId()
+     *
+     * @var int
+     */
+    protected $id;
+
+    /**
+     * @OGM\Property()
+     *
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * @OGM\Relationship(type="HAS_PERMISSION", direction="INCOMING", mappedBy="permissions", collection=true, targetEntity="Group")
+     *
+     * @var Collection|Group[]
+     */
+    protected $groups;
+
+
+    public function __construct($name)
+    {
+        $this->name = $name;
+        $this->groups = new Collection();
+    }
+
+    /**
+     * @return int
+     */
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * @return Collection|Group[]
+     */
+    public function getGroups()
+    {
+        return $this->groups;
+    }
+
+    /**
+     * @param string $name
+     */
+    public function setName($name)
+    {
+        $this->name = $name;
+    }
+}