test:on duplicate update

tests/duplicate_scan_test.go

@@ -0,0 +1,41 @@
+package tests_test
+
+import (
+	"fmt"
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+	"testing"
+)
+
+type ProductD struct {
+	*gorm.Model
+	ID    int64  `json:"id" gorm:"id"`
+	Code  string `json:"code" gorm:"type:varchar(20);uniqueIndex:idx_code"` // 指定类型为varchar(20)，创建唯一索引
+	Price int64  `json:"price" gorm:"price"`
+}
+
+// TableName 表名称
+func (*ProductD) TableName() string {
+	return "products"
+}
+
+func (*ProductD) Name() string {
+	return "products_d"
+}
+
+func TestDuplicateScan(t *testing.T) {
+	DB.AutoMigrate(&ProductD{})
+	DB.Create(&ProductD{Code: "D41", Price: 100})
+	DB.Create(&ProductD{Code: "D42", Price: 100})
+	// Migrate the schema
+	dst := &ProductD{
+		Code:  "D42",
+		Price: 0,
+	}
+	tx := DB.Begin()
+	tx = tx.Table(dst.Name()).Clauses(clause.OnConflict{Columns: []clause.Column{{Name: "code"}}, DoUpdates: clause.Assignments(map[string]interface{}{"price": gorm.Expr("price + ?", dst.Price)})}).Create(dst)
+	p := new(Product)
+	tx.Debug().Scan(&p)
+	fmt.Printf("tx scan ||%+v\n", p)
+	tx.Commit()
+}