Merge pull request #4255 from pyramation/master

lean() for migrating from stream() to cursor()

lib/querycursor.js

@@ -160,7 +160,9 @@ function _next(ctx, callback) {
 
       var opts = ctx.query._mongooseOptions;
       if (!opts.populate) {
-        return _create(ctx, doc, null, callback);
+        return opts.lean === true ?
+                callback(null, doc) :
+                _create(ctx, doc, null, callback);
       }
 
       var pop = helpers.preparePopulationOptionsMQ(ctx.query,

test/query.cursor.test.js

@@ -151,4 +151,28 @@ describe('QueryCursor', function() {
       }).catch(done);
     });
   });
+
+  describe('#lean()', function() {
+    it('lean', function(done) {
+      var cursor = Model.find().sort({ name: 1 }).lean().cursor();
+
+      var expectedNames = ['Axl', 'Slash'];
+      var cur = 0;
+      cursor.on('data', function(doc) {
+        assert.equal(doc.name, expectedNames[cur++]);
+        assert.strictEqual(false, doc instanceof mongoose.Document);
+      });
+
+      cursor.on('error', function(error) {
+        done(error);
+      });
+
+      cursor.on('end', function() {
+        assert.equal(cur, 2);
+        done();
+      });
+
+    });
+  });
+
 });