diff --git a/field.go b/field.go
index c30ef665..3624c45c 100644
--- a/field.go
+++ b/field.go
@@ -53,7 +53,7 @@ func (f *Field) sqlTag() (str string) {
 		}
 	}
 
-	typ, addational_typ, size := parseSqlTag(f.structField.Tag.Get(tagIdentifier))
+	typ, addational_typ, size := parseSqlTag(f.structField.Tag.Get(f.model.do.db.tagIdentifier))
 
 	if typ == "-" {
 		return
@@ -61,9 +61,9 @@ func (f *Field) sqlTag() (str string) {
 
 	if len(typ) == 0 {
 		if f.isPrimaryKey {
-			typ = f.model.do.chain.d.dialect.PrimaryKeyTag(value, size)
+			typ = f.model.do.db.dialect.PrimaryKeyTag(value, size)
 		} else {
-			typ = f.model.do.chain.d.dialect.SqlTag(value, size)
+			typ = f.model.do.db.dialect.SqlTag(value, size)
 		}
 	}
 
diff --git a/model.go b/model.go
index 0003bd04..71f17429 100644
--- a/model.go
+++ b/model.go
@@ -191,7 +191,7 @@ func (m *Model) tableName() (str string) {
 
 	str = toSnake(m.typeName())
 
-	if !singularTableName {
+	if !m.do.db.singularTable {
 		pluralMap := map[string]string{"ch": "ches", "ss": "sses", "sh": "shes", "day": "days", "y": "ies", "x": "xes", "s?": "s"}
 		for key, value := range pluralMap {
 			reg := regexp.MustCompile(key + "$")
@@ -205,7 +205,7 @@ func (m *Model) tableName() (str string) {
 }
 
 func (m *Model) callMethod(method string) {
-	if m.data == nil || m.do.chain.hasError() {
+	if m.data == nil || m.do.db.hasError() {
 		return
 	}