I've got a one-to-one relationship, Location, working with postgresql:
type App struct {
gorm.Model
PersoID string `gorm:"primary_key;unique" json:"perso_id"`
Location OllyLocation `gorm:"foreignkey:location_id"`
LocationID *uint `json:"-" gorm:"type:integer REFERENCES locations(id)"`
Users []User `json:"users,omitempty" gorm:"many2many:app_users;"`
}
type Location struct {
ID uint `json:"-" gorm:"primary_key;unique"`
CreatedAt time.Time `json:"-"`
UpdatedAt time.Time
Lat float64 `json:"lat"`
Long float64 `json:"long"`
Address string `json:"address"`
Country string `json:"country"`
}
But as you can see, the App structure has its own primaryKey id as string (and the GORM one).
Thus this block from doing a simple db.Save()
from gorm.
So I've tried to do:
func (previousModel *App) UpdateAndReturnedUpdated(db *gorm.DB, appUpdated *App) error {
if err := db.Model(previousModel).Update(appUpdated).Error; err != nil {
return err
}
return db.Preload("Location").First(previousModel, App{PersoID: appUpdated.PersoID}).Error
}
With this, the App is correctly updated - fantastic! - but not the Location.
The location is re created in the db with the new values and the foreignKey LocationID is updated on the App.
This is super annoying because if I want to do an update of the address only without specifying other fields, they are just re created with the original type value (lat / long will be 0)
Any ideas about how to update the foreignKey? Thanks!