t/var/configs/extra.json

   1 {
   2         "sets": [{
   3                 "class": "Photo",
   4                 "quantity": "all",
   5         "external": {
   6             "file": {
   7                 "class": "File",
   8                 "args": {"path":"__ATTR(photo_dir)__"}
   9             }
  10         }
  11         },{
  12                 "class": "Album",
  13                 "quantity": "all",
  14          "fetch" : [
  15             {
  16                "quantity" : "all",
  17                "rel" : "photos"
  18             }
  19          ]
  20         },{
  21                 "class": "Photographer",
  22                 "quantity": "all"
  23         }]
  24 }