Support use variable to keep query chain

README.md

@@ -710,6 +710,12 @@ db.Where("created_at > ?", "2013-10-10").Find(&cancelled_orders, "state = ?", "c
 //// SELECT * FROM orders WHERE created_at > '2013/10/10' AND state = 'shipped'; (shipped_orders)
 
 
+// Use variable to keep query chain
+todays_orders := db.Where("created_at > ?", "2013-10-29")
+cancelled_orders := todays_orders.Where("state = ?", "cancelled")
+shipped_orders := todays_orders.Where("state = ?", "shipped")
+
+
 // Search with shared conditions from different tables
 db.Where("product_name = ?", "fancy_product").Find(&orders).Find(&shopping_carts)
 //// SELECT * FROM orders WHERE product_name = 'fancy_product'; (orders)

gorm_test.go

@@ -1354,11 +1354,14 @@ func TestTransaction(t *testing.T) {
 	}
 }
 
-func (s *CreditCard) BeforeSave() (err error) {
-	if s.Number == "0000" {
-		err = errors.New("invalid credit card")
+func TestQueryChain(t *testing.T) {
+	var user_count1, user_count2 int64
+	d := db.Model(User{}).Where("age > ?", 20)
+	d.Where("name = ?", "3").Count(&user_count1)
+	d.Count(&user_count2)
+	if user_count2 == user_count1 {
+		t.Error("DB object should be cloned when search")
 	}
-	return
 }
 
 func BenchmarkGorm(b *testing.B) {