Add Support for TableName, used to specify struct's table name

README.md

@@ -70,9 +70,11 @@ db, err := Open("postgres", "user=gorm dbname=gorm sslmode=disable")
 // Set the maximum idle database connections
 db.SetPool(100)
 
+
 // By default, table name is plural of struct type, if you like singular table name
 db.SingularTable(true)
 
+
 // Gorm is goroutines friendly, so you can create a global variable to keep the connection and use it everywhere like this
 
 var DB gorm.DB
@@ -587,6 +589,19 @@ db.Table("deleted_users").Where("name = ?", "jinzhu").Delete()
 //// DELETE FROM deleted_users WHERE name = 'jinzhu';
 ```
 
+### Specify Table Name for Struct
+
+You are possible to specify table name for a struct by defining method TableName
+
+```go
+type Cart struct {
+}
+
+func (c Cart) TableName() string {
+	return "shopping_cart"
+}
+```
+
 ## Run Raw SQl
 
 ```go

gorm_test.go

@@ -1198,3 +1198,40 @@ func TestRelated(t *testing.T) {
 		t.Errorf("Should get user from credit card correctly")
 	}
 }
+
+type Order struct {
+}
+
+type Cart struct {
+}
+
+func (c Cart) TableName() string {
+	return "shopping_cart"
+}
+
+func TestTableName(t *testing.T) {
+	var table string
+
+	model := &Model{data: Order{}}
+	table, _ = model.tableName(false)
+	if table != "orders" {
+		t.Errorf("Order table name should be orders")
+	}
+
+	table, _ = model.tableName(true)
+	if table != "order" {
+		t.Errorf("Order's singular table name should be order")
+	}
+
+	model2 := &Model{data: Cart{}}
+	table, _ = model2.tableName(false)
+	if table != "shopping_cart" {
+		t.Errorf("Cart's singular table name should be shopping_cart")
+	}
+
+	model3 := &Model{data: &Cart{}}
+	table, _ = model3.tableName(false)
+	if table != "shopping_cart" {
+		t.Errorf("Cart's singular table name should be shopping_cart")
+	}
+}

model.go

@@ -282,6 +282,16 @@ func (m *Model) tableName(singularTableName bool) (str string, err error) {
 		return
 	}
 
+	fm := reflect.Indirect(reflect.ValueOf(m.data)).MethodByName("TableName")
+	if fm.IsValid() {
+		v := fm.Call([]reflect.Value{})
+		if len(v) > 0 {
+			if result, ok := v[0].Interface().(string); ok {
+				return result, nil
+			}
+		}
+	}
+
 	str = toSnake(m.typeName())
 
 	if !singularTableName {
@@ -293,6 +303,7 @@ func (m *Model) tableName(singularTableName bool) (str string, err error) {
 			}
 		}
 	}
+
 	return
 }