lib/indexing_db_local.js
function(collection, options, cb) {
    var ids = [];
    var keys = _.isFunction(collection.url) ? collection.url() : collection.url;
    keys += options.keys;
    debug('findKeys', keys);
    this.store().getItem(keys, function(err, data) {
      if (data) ids.push(keys);
      cb(null, ids);
    });
  }
function(collection, options, cb) {
    var ids = [];
    var keys = _.isFunction(collection.url) ? collection.url() : collection.url;
    keys += options.keys;
    debug('findKeys', keys);
    this.store().getItem(keys, function(err, data) {
      if (data) ids.push(keys);
      cb(null, ids);
    });
  }
function ( collection , options , cb ) { var ids = [ ] ; var keys = _ . isFunction ( collection . url ) ? collection . url ( ) : collection . url ; keys += options . keys ; debug ( 'findKeys' , keys ) ; this . store ( ) . getItem ( keys , function ( err , data ) { if ( data ) ids . push ( keys ) ; cb ( null , ids ) ; } ) ; }
mock adapter only supports exact match
mock adapter only supports exact match