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) BeforeCreate(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 BeforeCreate method will be called before writing to the database.

The available callbacks include:

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

Related Content

• Models - Define a database model.