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Support use variable to keep query chain

This commit is contained in:
Jinzhu 2013-11-16 22:42:00 +08:00
parent c9e8c8d16c
commit 8fd8604a70
2 changed files with 13 additions and 4 deletions
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6
README.md
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@ -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) //// 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 // Search with shared conditions from different tables
db.Where("product_name = ?", "fancy_product").Find(&orders).Find(&shopping_carts) db.Where("product_name = ?", "fancy_product").Find(&orders).Find(&shopping_carts)
//// SELECT * FROM orders WHERE product_name = 'fancy_product'; (orders) //// SELECT * FROM orders WHERE product_name = 'fancy_product'; (orders)

11
gorm_test.go
View File

@ -1354,11 +1354,14 @@ func TestTransaction(t *testing.T) {
} }
} }
func (s *CreditCard) BeforeSave() (err error) { func TestQueryChain(t *testing.T) {
if s.Number == "0000" { var user_count1, user_count2 int64
err = errors.New("invalid credit card") 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) { func BenchmarkGorm(b *testing.B) {