indexing - Select from IndexedDB database, using multiple indexes -

each of indexeddb objects have following format:

object: {      objectname: "somename"      objecttest: "sometest"      objectage: "someage" } 

then have following indexes set:

storeobject.createindex( "by_objectname", "objectname", { unique: false } ); storeobject.createindex( "by_objecttest", "objecttest", { unique: false } ); storeobject.createindex( "by_objectage", "objectage", { unique: false } ); 

so first wanted loop through objects objectname (this working):

var openedindex = storeobject.index("by_objectname"); var numitemsinindex = openedindex.count(); if (openedindex) {     var curcursor = openedindex.opencursor();                    curcursor.onsuccess = function(evt) {                            var cursor = evt.target.result;          if (cursor) {                 //do                 cursor.continue();         }     } } 

so above code taking objects , sorted objectname. how can take objects have objecttest: "certainvalue" , sorting objectname remain same in above example. need filter list of result before line if (openedindex) { because need use numitemsinindex later in loop.

so in other words, if relational database, how implement:

select * objects objecttest = "certainvalue" sort objectname 

you can create index on 2 properties @ once defining keypath parameter createindex array. use property wish sort first item in array. example, see other posts, one: in indexeddb, there way make sorted compound query?