来自控制器的Rails验证

Question

有一个联系页面,提供输入姓名,电话,电子邮件和消息,然后发送给管理员的电子邮件.没有理由在DB中存储消息.

题.如何:

1. 在控制器中使用Rails验证,完全不使用模型,或者

2. 在模型中使用验证,但没有任何数据库关系

UPD:

模型:

class ContactPageMessage
include ActiveModel::Validations
include ActiveModel::Conversion
extend ActiveModel::Naming

attr_accessor :name, :telephone, :email, :message
validates :name, :telephone, :email, :message, presence: true
validates :email, email_format: { :message => "???????? ?????? E-mail ??????"}

def initialize(attributes = {})
    attributes.each do |name, value|
      send("#{name}=", value)
    end
end

def persisted?
  false
end
end

控制器:

def sendmessage
cpm = ContactPageMessage.new()
if cpm.valid?
    @settings = Setting.first
    if !@settings
        redirect_to contacts_path, :alert => "Fail"
    end
    if ContactPageMessage.received(params).deliver
        redirect_to contacts_path, :notice => "Success"
    else
        redirect_to contacts_path, :alert => "Fail"
    end
else
    redirect_to contacts_path, :alert => "Fail"
end
end
end

Answer 1

你应该使用模型而不继承自ActiveRecord::Base类.

class ContactPageMessage

  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming

  attr_accessor :whatever

  validates :whatever, :presence => true

  def initialize(attributes = {})
    attributes.each do |name, value|
      send("#{name}=", value)
    end
  end

  def persisted?
    false
  end

end

通过这个,您将能够初始化新对象并能够在该对象上调用验证.

我认为你有一个不同的类名同名,在你的控制器代码中,我可以看到:

if ContactPageMessage.received(params).deliver
    redirect_to contacts_path, :notice => "Success"
else

如果这是您的邮件程序类更改其名称ContactPageMessageMailer.你不会得到那个错误.

希望它会有所帮助.谢谢

Answer 2

我仍然建议你使用模型,rails模型不必继承ActiveRecord::Base.例如:

class Contact
  include ActiveModel::Validations
  attr_accessor :name, :telephone, :email, :message
  validates_presence_of :name, :telephone, :email, :message
  validates_format_of :email, with: EMAIL_REGEXP
end

你可以在你的控制器中使用它:

contact = Contact.new
# ...
if contact.valid?
  # do something
else
  # do something else
end