diff --git a/chain.go b/chain.go
index 2c71ae5c..1ecef1bc 100644
--- a/chain.go
+++ b/chain.go
@@ -38,7 +38,7 @@ func (s *Chain) err(err error) error {
 }
 
 func (s *Chain) hasError() bool {
-	return len(s.Errors) > 0
+	return s.Error != nil
 }
 
 func (s *Chain) deleteLastError() {
diff --git a/do.go b/do.go
index d70d2c5d..8b1f902e 100644
--- a/do.go
+++ b/do.go
@@ -302,14 +302,14 @@ func (s *Do) last() {
 }
 
 func (s *Do) getForeignKey(from *Model, to *Model, foreign_key string) (err error, from_from bool, foreign_value interface{}) {
-	if has_column, is_slice, value := from.ColumnAndValue(foreign_key); has_column {
+	if has_column, is_slice, value := from.columnAndValue(foreign_key); has_column {
 		from_from = true
 		if is_slice {
 			foreign_value = to.primaryKeyValue()
 		} else {
 			foreign_value = value
 		}
-	} else if has_column, _, _ := to.ColumnAndValue(foreign_key); has_column {
+	} else if has_column, _, _ := to.columnAndValue(foreign_key); has_column {
 		foreign_value = from.primaryKeyValue()
 	} else {
 		err = errors.New("Can't find valid foreign Key")
diff --git a/model.go b/model.go
index da595d71..0003bd04 100644
--- a/model.go
+++ b/model.go
@@ -151,7 +151,7 @@ func (m *Model) hasColumn(name string) bool {
 	return false
 }
 
-func (m *Model) ColumnAndValue(name string) (has_column bool, is_slice bool, value interface{}) {
+func (m *Model) columnAndValue(name string) (has_column bool, is_slice bool, value interface{}) {
 	data := m.reflectData()
 
 	if data.Kind() == reflect.Struct {