Data.js Query Interface

query_paths.js

// For a specific user get all document subscriptions, along with their corresponding 
// documents, complete with creator, subjects, entites, and all content nodes (=children recursively)
query = {
   "type": "/type/subscription",
   "user": "/user/"+username,
  "document": {
     "creator": {},
     "children": {_recursive: true},
     "subjects": {},
     "entities": {}
  },
  "creator": {}
}


// Usage:
graph.fetch(qry, function(err, nodes) {
  console.log(nodes.keys());
});

range_queries.js

// We should support basic range queries to make use of CouchDB views.
// Currently those range queries only work locally.

qry = {
  "type": "/type/person",
  "age>": 20
}

// How can we express "within" (would internally use startkey/endkey)

// All persons whose name is between "M" and "U".
qry = {
  "type": "/type/person",
  "name>=": "M",
  "name<=": "U"
}

// All persons whose name is between "M" and "U".
qry = {
  "type": "/type/person",
  "name.between": ["M", "U"]
}

two_pass_queries.js

// Sometimes you might want do do fast queries using an index, but you want to apply further
// filters that can't be handled by the indexed query. You should be able to pass an additional
// query object that further narrows down the result. This is all done on the server, so the
// client can relax and network traffic gets minimized.

// Fetch all persons originating in Springfield containing "Simpsons" in their name 
// with age >= 10
qry = {
  "type": "/type/person",
  "origin": "/location/springfield",
  "_match": {
    "name~": "Simpsons",
    "age>=": 10
  }
}