当我使用IRB创建一个新的模型实例并保存时,没有什么打印到控制台,我得到一个“ActiveRecord :: StatementInvalid：MysqL :: Error：Column’user_id’不能为空”的错误,所以我假设before_save不是被叫我不知道为什么.我甚至尝试使用before_save过滤器.这是我的代码：
require 'secure_resource/secure_resource_encryption'
class Database < ActiveRecord::Base
belongs_to :username_encryption,:class_name => "Encryption",:foreign_key => :username_encryption_id
belongs_to :password_encryption,:foreign_key => :password_encryption_id
# Virtual attribute to retrieve the decrypted username.
def username
if self.username_encryption.nil?
return nil
end
begin
return self.username_encryption.encryption
rescue SecureResourceError
raise SecureResourceError
end
end
# Provides a way to reset the username.
def username=(username)
if self.username_encryption.nil?
self.username_encryption = Encryption.new
self.username_encryption.encryption = username
end
end
# Virtual attribute to retrieve the decrypted password.
def password
if password_encryption.nil?
return nil
end
begin
return password_encryption.encryption
rescue SecureResourceError
raise SecureResourceError
end
end
# Provides a way to reset the password.
def password=(password)
if self.password_encryption.nil?
self.password_encryption = Encryption.new
self.password_encryption.encryption = password
end
end
def before_save
p 'ZZZZZZZZZZZZZZZ'
p self.user_id.to_s + ' ZZZZZZ'
p 'ZZZZZZZZZZZZZZZ'
self.username_encryption.user_id = self.user_id
self.username_encryption.save
self.username_encryption_id = self.username_encryption.id
self.password_encryption.user_id = self.user_id
self.password_encryption.save
self.password_encryption_id = self.password_encryption.id
end
end
解决方法
正如你可以看到
in the documtation,before_save在验证之后发生.在你的情况下,验证将失败,并且永远不会调用before_save.
由于回调的目标是在验证发生之前将对象设置为有效状态,请尝试before_validation回调.