diff --git a/do.go b/do.go
index 1a695915..5c1f1886 100644
--- a/do.go
+++ b/do.go
@@ -262,8 +262,11 @@ func (s *Do) prepareUpdateSql(include_self bool) {
 	}
 
 	if include_self {
-		for key, value := range s.model.columnsAndValues("update") {
-			sqls = append(sqls, fmt.Sprintf("%v = %v", s.quote(key), s.addToVars(value)))
+		data := s.model.reflectData()
+		if data.CanAddr() {
+			for key, value := range s.model.columnsAndValues("update") {
+				sqls = append(sqls, fmt.Sprintf("%v = %v", s.quote(key), s.addToVars(value)))
+			}
 		}
 	}
 
diff --git a/gorm_test.go b/gorm_test.go
index 31e0480d..08b3bab0 100644
--- a/gorm_test.go
+++ b/gorm_test.go
@@ -895,7 +895,7 @@ func TestUpdate(t *testing.T) {
 		t.Errorf("Product 456 should be changed to 789")
 	}
 
-	if db.Model(&product2).Update("CreatedAt", time.Now().Add(time.Hour)).Error != nil {
+	if db.Model(product2).Update("CreatedAt", time.Now().Add(time.Hour)).Error != nil {
 		t.Error("No error should raise when update with CamelCase")
 	}
 
diff --git a/main.go b/main.go
index cfda79c4..f14cab56 100644
--- a/main.go
+++ b/main.go
@@ -16,7 +16,7 @@ type DB struct {
 	tagIdentifier string
 	singularTable bool
 	logger        Logger
-	logMode       bool
+	logMode       int
 }
 
 func Open(driver, source string) (db DB, err error) {
@@ -40,7 +40,11 @@ func (s *DB) SetLogger(l Logger) {
 }
 
 func (s *DB) LogMode(b bool) *DB {
-	s.logMode = b
+	if b {
+		s.logMode = 2
+	} else {
+		s.logMode = 1
+	}
 	return s
 }
 
diff --git a/model.go b/model.go
index c21a6bae..d5fcf5ff 100644
--- a/model.go
+++ b/model.go
@@ -127,14 +127,9 @@ func (m *Model) columnsHasValue(operation string) (fields []*Field) {
 }
 
 func (m *Model) updatedColumnsAndValues(values map[string]interface{}, ignore_protected_attrs bool) (results map[string]interface{}, any_updated bool) {
-	if m.data == nil {
-		return values, true
-	}
-
 	data := m.reflectData()
 	if !data.CanAddr() {
-		m.do.err(errors.New("Can't take address of the object"))
-		return
+		return values, true
 	}
 
 	for key, value := range values {
diff --git a/private.go b/private.go
index 541a0d54..f87d4cc8 100644
--- a/private.go
+++ b/private.go
@@ -34,7 +34,13 @@ func (s *DB) do(data interface{}) *Do {
 func (s *DB) err(err error) error {
 	if err != nil {
 		s.Error = err
-		s.warn(err)
+		if s.logMode == 0 {
+			if err != RecordNotFound {
+				go fmt.Println(err)
+			}
+		} else {
+			s.warn(err)
+		}
 	}
 	return err
 }
@@ -44,7 +50,7 @@ func (s *DB) hasError() bool {
 }
 
 func (s *DB) print(level string, v ...interface{}) {
-	if s.logMode || level == "debug" {
+	if s.logMode == 2 || level == "debug" {
 		if _, ok := s.parent.logger.(Logger); !ok {
 			fmt.Println("logger haven't been set, using os.Stdout")
 			s.parent.logger = default_logger