final fix for #1884

fix mongo functions so they return correct data if duplicate keys are
passed. getObjects(['post:1', 'post:1'], callback) was only returning
one object.

src/database/mongo/helpers.js

@@ -2,23 +2,13 @@
 
 var helpers = {};
 
-helpers.findItem = function(data, key) {
-	if(!data) {
-		return null;
+helpers.toMap = function(data) {
+	var map = {};
+	for (var i = 0; i<data.length; ++i) {
+		map[data[i]._key] = data[i];
 	}
-
-	for(var i=0; i<data.length; ++i) {
-		if(data[i]._key === key) {
-			var item = data.splice(i, 1);
-			if(item && item.length) {
-				return item[0];
-			} else {
-				return null;
-			}
-		}
-	}
-	return null;
-};
+	return map;
+}
 
 helpers.fieldToString = function(field) {
 	if(field === null || field === undefined) {