Reverting. Will work on this in a separate PR.

Author: maxfortun

lib/backend.js

@@ -772,11 +772,9 @@ Backend.prototype._fetchSnapshot = function(collection, id, version, callback) {
   var db = this.db;
   var backend = this;
 
-  var options = {metadata: true};
-  var fields = null;
   var shouldGetLatestSnapshot = version === null;
   if (shouldGetLatestSnapshot) {
-    return backend.db.getSnapshot(collection, id, fields, options, function(error, snapshot) {
+    return backend.db.getSnapshot(collection, id, null, null, function(error, snapshot) {
       if (error) return callback(error);
 
       callback(null, snapshot);
@@ -791,7 +789,7 @@ Backend.prototype._fetchSnapshot = function(collection, id, version, callback) {
     // - we want to avoid the 'op' middleware, because we later use the 'readSnapshots' middleware in _sanitizeSnapshots
     // - we handle the projection in _sanitizeSnapshots
     var from = milestoneSnapshot ? milestoneSnapshot.v : 0;
-    db.getOps(collection, id, from, version, options, function(error, ops) {
+    db.getOps(collection, id, from, version, null, function(error, ops) {
       if (error) return callback(error);
 
       backend._buildSnapshotFromOps(id, milestoneSnapshot, ops, function(error, snapshot) {
@@ -845,12 +843,9 @@ Backend.prototype._fetchSnapshotByTimestamp = function(collection, id, timestamp
   var from = 0;
   var to = null;
 
-  var options = {metadata: true};
-  var fields = null;
-
   var shouldGetLatestSnapshot = timestamp === null;
   if (shouldGetLatestSnapshot) {
-    return backend.db.getSnapshot(collection, id, fields, options, function(error, snapshot) {
+    return backend.db.getSnapshot(collection, id, null, null, function(error, snapshot) {
       if (error) return callback(error);
 
       callback(null, snapshot);
@@ -866,6 +861,7 @@ Backend.prototype._fetchSnapshotByTimestamp = function(collection, id, timestamp
       if (error) return callback(error);
       if (snapshot) to = snapshot.v;
 
+      var options = {metadata: true};
       db.getOps(collection, id, from, to, options, function(error, ops) {
         if (error) return callback(error);
         filterOpsInPlaceBeforeTimestamp(ops, timestamp);