How do I perform migrations using GORM?

How do I perform migrations using GORM?

To perform migrations in GORM, you can use the AutoMigrate method. This method automatically migrates your schema, keeping it up to date.

Can you show me an example of using AutoMigrate?

Sure! Here's a simple example:

package main

import (
    "gorm.io/driver/sqlite"
    "gorm.io/gorm"
)

type User struct {
    ID   uint   `gorm:"primaryKey"`
    Name string `gorm:"size:255"`
}

func main() {
    db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
    if err != nil {
        panic("failed to connect database")
    }
    db.AutoMigrate(&User{})
}

What if I want to add a new field to an existing model?

You can simply update your model struct by adding the new field and then call AutoMigrate again. GORM will handle the changes.

Are there any limitations to using AutoMigrate?

Yes, AutoMigrate is not suitable for complex migrations like renaming columns or changing types. For those, you should use raw SQL or migration libraries.