Callbacks

Pop provides a means to execute code before and after database operations. This is done by defining specific methods for your models. For example, to hash a user password you may want to define the following method:

type User struct {
	ID       uuid.UUID
	Email    string
	Password string
}

func (u *User) BeforeSave(tx *pop.Connection) error {
	hash, err := bcrypt.GenerateFromPassword([]byte(u.Password), bcrypt.DefaultCost)
	if err != nil {
		return errors.WithStack(err)
	}

	u.Password = string(hash)
	
	return nil
}

In the above example, when the connection's Save method is called with a User, the BeforeSave method will be called before writing to the database. The available callbacks include:

  • BeforeSave
  • BeforeCreate
  • BeforeUpdate
  • BeforeDestroy
  • AfterSave
  • AfterCreate
  • AfterUpdate
  • AfterDestroy
  • AfterFind

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