diff --git a/frappe/core/doctype/comment/comment.py b/frappe/core/doctype/comment/comment.py
index 04ecc83b38..01707978c8 100644
--- a/frappe/core/doctype/comment/comment.py
+++ b/frappe/core/doctype/comment/comment.py
@@ -144,7 +144,7 @@ def update_comments_in_parent(reference_doctype, reference_name, _comments):
 	"""Updates `_comments` property in parent Document with given dict.
 
 	:param _comments: Dict of comments."""
-	if not reference_doctype or not reference_name or frappe.db.get_value("DocType", reference_doctype, "issingle"):
+	if not reference_doctype or not reference_name or frappe.db.get_value("DocType", reference_doctype, "issingle") or frappe.db.get_value("DocType", reference_doctype, "virtual_doctype"):
 		return
 
 	try:
diff --git a/frappe/model/base_document.py b/frappe/model/base_document.py
index f1667b4fa8..e508d6abc2 100644
--- a/frappe/model/base_document.py
+++ b/frappe/model/base_document.py
@@ -505,18 +505,18 @@ class BaseDocument(object):
 						not _df.get('fetch_if_empty')
 						or (_df.get('fetch_if_empty') and not self.get(_df.fieldname))
 				]
+				if not frappe.get_meta(doctype).virtual_doctype:
+					if not fields_to_fetch:
+						# cache a single value type
+						values = frappe._dict(name=frappe.db.get_value(doctype, docname,
+							'name', cache=True))
+					else:
+						values_to_fetch = ['name'] + [_df.fetch_from.split('.')[-1]
+							for _df in fields_to_fetch]
 
-				if not fields_to_fetch:
-					# cache a single value type
-					values = frappe._dict(name=frappe.db.get_value(doctype, docname,
-						'name', cache=True))
-				else:
-					values_to_fetch = ['name'] + [_df.fetch_from.split('.')[-1]
-						for _df in fields_to_fetch]
-
-					# don't cache if fetching other values too
-					values = frappe.db.get_value(doctype, docname,
-						values_to_fetch, as_dict=True)
+						# don't cache if fetching other values too
+						values = frappe.db.get_value(doctype, docname,
+							values_to_fetch, as_dict=True)
 
 				if frappe.get_meta(doctype).issingle:
 					values.name = doctype