我们很容易理解前面的部分,就是一个简单的插入语句,让我们看下后面的部分ON DUPLICATE KEY UPDATE `email`=VALUES(`email`),`address`=VALUES(`address`),`update_time`=VALUES(`update_time`)我们看到后面是一个更新的操作,并且指定了更新的字段,也就是说,如果判断出表中没有这条
比如插入 f_create_uid,更新时忽略 f_create_uid,只更新 f_update_uid。可使用 gorm 的 BeforeCreate 和 BeforeUpdate 钩子,这两个钩子分别在创建和更新记录之前被调用。 // BeforeCreate 在创建记录之前调用func(dob *MyStruct)BeforeCreate(tx *gorm.DB) (errerror) { dob.CreateUid =// 设置创建人iddob.U...
OnConstraint string DoNothing bool DoUpdates Set UpdateAll bool } func (OnConflict) Name() string { return "ON CONFLICT" } // Build build onConflict clause func (onConflict OnConflict) Build(builder Builder) { if len(onConflict.Columns) > 0 { builder.WriteByte('(') for idx, column :=...
// INSERT INTO "emails" (user_id,email) VALUES (111, "jinzhu@example.com"), (111, "jinzhu-2@example.com") ON DUPLICATE KEY DO NOTHING; // INSERT INTO "languages" ("name") VALUES ('ZH'), ('EN') ON DUPLICATE KEY DO NOTHING; // INSERT INTO "user_languages" ("user_id","lang...
func Test_db_upsert(t *testing.T) { // ... pos := []PO{ //... } // 批量插入,倘若发生冲突(id主键),则直接忽略执行该条记录 // INSERT INTO `po` ... ON DUPLICATE KEY UPDATE `id` = `id` resDB := db.WithContext(ctx).Clauses( clause.OnConflict{ Columns: []clause.Column{{...
ON DUPLICATE KEY SET address1=VALUES(address1);// INSERT INTO "users" (name,billing_address_id,shipping_address_id) VALUES ("jinzhu", 1, 2);// INSERT INTO "emails" (user_id,email) VALUES (111, "jinzhu@example.com"), (111, "jinzhu-2@example.com") ON DUPLICATE KEY SET email=VALU...
ON DUPLICATE KEY UPDATE 呢?这个主要是应用于存在唯一索引的情况下,因为主键本身就是一个特殊的唯一索引。所以gorm是尽最大努力来保证数据更新成功。 1.3 待更新的数据只有部分字段 如果待更新的数据中不包含Userid,如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 dsn := "user:password@tcp(127.0....
2022/05/15 21:43:00 C:/Users/68725/Desktop/leetcode/main.go:33 [0.528ms] [rows:1] INSERT INTO `credit_cards` (`created_at`,`updated_at`,`deleted_at`,`number`,`user_id`) VALUES ('2022-05-15 21:43:00.089','2022-05-15 21:43:00.089',NULL,'333',1) ON DUPLICATE KEY UPDATE...
hantmac opened on Dec 4, 2019 What version of Go are you using (go version)? go 1.13 Which database and its version are you using? mysql Please provide a complete runnable program to reproduce your issue. IMPORTANT database.DB.Self.Set("gorm:insert_option", "ON DUPLICATE KEY UPDATE"...
go:52 [1.197ms] [rows:3] INSERT INTO `user_languages` (`user_id`,`language_id`) VALUES (1,1),(1,2),(1,3) ON DUPLICATE KEY UPDATE `user_id`=`user_id` 2022/07/29 22:58:29 /Users/feng/go/src/GormStart/ch11/mian.go:52 [16.804ms] [rows:1] INSERT INTO `users` (`...