reflect.Value.Set using unaddressable value

Question

g.GET(\"/\", func(c echo.Context) error {
    var users []models.User
    err := db.Find(users).Error
    if err != nil {
        fmt.Println(err)
    }
    return c.JSO         


        

Answer 1

Just to add clarification to S.Diego answers, changing this:

err := db.Find(users).Error

to this:

err := db.Find(&users).Error

the error says, the variable users is not addressable, because it is not a pointer.

Answer 2

You have to call Find with a pointer to the slice.

err := db.Find(&users).Error

relevant Gorm documentation: http://jinzhu.me/gorm/crud.html#query

Answer 3

In a very similar fashion to the accepted answer (but in a slightly different context), and an error that I keep making in different projects:

func migrate(db *gorm.DB) {
    db.AutoMigrate(User{}, Activity{})
}

becomes

func migrate(db *gorm.DB) {
    db.AutoMigrate(&User{}, &Activity{})
}

Notice the ampersands.