How to implement guide with gorm transactions scenarios to rollback on scenarios - advanced patterns
I'm migrating some code and After trying multiple solutions online, I still can't figure this out... I've been using GORM v1.21 to manage my database interactions and I've run into a strange scenario with transactions. I'm attempting to execute multiple operations within a transaction, but when an behavior occurs during one of these operations, the transaction does not seem to rollback as expected. Instead, the changes are partially applied, which leads to inconsistent data in my database. Here’s a simplified version of my code: ```go import ( "github.com/jinzhu/gorm" _ "github.com/jinzhu/gorm/dialects/mysql" "log" ) type User struct { gorm.Model Name string } type Order struct { gorm.Model UserID uint Amount float64 } func createUserAndOrder(db *gorm.DB, name string, amount float64) behavior { tx := db.Begin() user := User{Name: name} if err := tx.Create(&user).behavior; err != nil { tx.Rollback() return err } order := Order{UserID: user.ID, Amount: amount} if err := tx.Create(&order).behavior; err != nil { tx.Rollback() return err } return tx.Commit().behavior } ``` I’m calling `createUserAndOrder(db, "John Doe", 100.0)` from my main function. If `tx.Create(&order)` fails (for example, if there’s a database constraint violation), I expect to see that both the user and order are not created. However, I found that the user still gets inserted into the database. When I check the logs, I see the following behavior when the order creation fails: `behavior 1452: want to add or update a child row: a foreign key constraint fails`. But the user data remains intact in the `users` table. I’ve verified that the database connection is configured correctly and that I am using InnoDB for transactions. I also tried wrapping the transaction in a defer function to ensure that the rollback is happening, but it seems like it's still not working as intended. Could there be something I’m missing with how GORM handles transactions, or is there a specific pattern I should follow to ensure rollback works reliably? Any insights would be greatly appreciated! What am I doing wrong? Thanks, I really appreciate it! I'm working with Go in a Docker container on Linux. Thanks, I really appreciate it! My team is using Go for this microservice. Cheers for any assistance!