Set table name handler

main.go

@@ -485,7 +485,3 @@ func (s *DB) SetJoinTableHandler(source interface{}, column string, handler Join
 		}
 	}
 }
-
-func (s *DB) SetTableNameHandler(source interface{}, handler func(*DB) string) {
-	s.NewScope(source).GetModelStruct().TableName = handler
-}

model_struct.go

@@ -13,11 +13,19 @@ import (
 
 var modelStructs = map[reflect.Type]*ModelStruct{}
 
+var DefaultTableNameHandler = func(db *DB, defaultTableName string) string {
+	return defaultTableName
+}
+
 type ModelStruct struct {
-	PrimaryFields []*StructField
-	StructFields  []*StructField
-	ModelType     reflect.Type
-	TableName     func(*DB) string
+	PrimaryFields    []*StructField
+	StructFields     []*StructField
+	ModelType        reflect.Type
+	defaultTableName string
+}
+
+func (s ModelStruct) TableName(db *DB) string {
+	return DefaultTableNameHandler(db, s.defaultTableName)
 }
 
 type StructField struct {
@@ -94,14 +102,14 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
 	}
 
 	// Set tablename
-	if fm := reflect.New(scopeType).MethodByName("TableName"); fm.IsValid() {
-		if results := fm.Call([]reflect.Value{}); len(results) > 0 {
-			if name, ok := results[0].Interface().(string); ok {
-				modelStruct.TableName = func(*DB) string {
-					return name
-				}
-			}
-		}
+	type tabler interface {
+		TableName() string
+	}
+
+	if tabler, ok := reflect.New(scopeType).Interface().(interface {
+		TableName() string
+	}); ok {
+		modelStruct.defaultTableName = tabler.TableName()
 	} else {
 		name := ToDBName(scopeType.Name())
 		if scope.db == nil || !scope.db.parent.singularTable {
@@ -112,9 +120,7 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
 			}
 		}
 
-		modelStruct.TableName = func(*DB) string {
-			return name
-		}
+		modelStruct.defaultTableName = name
 	}
 
 	// Get all fields

scope.go

@@ -251,12 +251,7 @@ func (scope *Scope) TableName() string {
 		return tabler.TableName(scope.db)
 	}
 
-	if scope.GetModelStruct().TableName != nil {
-		return scope.GetModelStruct().TableName(scope.db)
-	}
-
-	scope.Err(errors.New("wrong table name"))
-	return ""
+	return scope.GetModelStruct().TableName(scope.db)
 }
 
 func (scope *Scope) QuotedTableName() (name string) {