Rename resource to asset
Add album repository
 Rapsys\TreeBundle\Entity\Album:
     type: entity
-    #repositoryClass: Rapsys\TreeBundle\Repository\AlbumRepository
+    repositoryClass: Rapsys\TreeBundle\Repository\AlbumRepository
     table: albums
     id:
         id:
         path:
             type: string
             length: 4096
-            nullable: true
-        title:
-            type: string
-            length: 64
+            unique: true
             nullable: true
         slug:
             type: string
         updated:
             type: datetime
     oneToMany:
-        resources:
-            targetEntity: Rapsys\TreeBundle\Entity\Resource
+        assets:
+            targetEntity: Rapsys\TreeBundle\Entity\Asset
             mappedBy: album
     lifecycleCallbacks:
         preUpdate: ['preUpdate']