Can pick type project on embedded documents

lib/cursor.js

@@ -85,18 +85,16 @@ Cursor.prototype.project = function (candidates) {
   candidates.forEach(function (candidate) {
     var toPush;
     if (action === 1) {   // pick-type projection
-      toPush = _.pick(candidate, keys);
+      toPush = { $set: {} };
+      keys.forEach(function (k) {
+        toPush.$set[k] = model.getDotValue(candidate, k);
+        if (toPush.$set[k] === undefined) { delete toPush.$set[k]; }
+      });
+      toPush = model.modify({}, toPush);
     } else {   // omit-type projection
-      //console.log('--------------------------------------------');
-      //console.log(candidate);
       toPush = { $unset: {} };
       keys.forEach(function (k) { toPush.$unset[k] = true });
-
-      //console.log(toPush);
-
       toPush = model.modify(candidate, toPush);
-
-      //console.log(toPush);
     }
     if (keepId) {
       toPush._id = candidate._id;

test/cursor.test.js

@@ -834,6 +834,21 @@ describe('Cursor', function () {
       });
     });
 
+    it("Projections on embedded documents - pick type", function (done) {
+      var cursor = new Cursor(d, {});
+      cursor.sort({ age: 1 });   // For easier finding
+      cursor.projection({ name: 1, 'toys.ballon': 1, _id: 0 });
+      cursor.exec(function (err, docs) {
+        assert.deepEqual(docs[0], { name: 'Jo', toys: { ballon: 'much' } });
+        assert.deepEqual(docs[1], { name: 'LM' });
+        assert.deepEqual(docs[2], { name: 'Grafitti' });
+        assert.deepEqual(docs[3], { name: 'Louis', toys: { ballon: 'yeah' } });
+        assert.deepEqual(docs[4], {});
+
+        done();
+      });
+    });
+
   });   // ==== End of 'Projections' ====
 
 });