ruby-on-rails – Rails委托使用不同的名称

您好我在使用Form Object重构模式.
我有两个模型,Project和User.这样的

Project.first.name # "Buy milk"
User.first.name # "John Doe"

我有一个表单接受项目的名称和用户的名称.

class UserForm
  include ActiveModel::Model

   def initialize(name:'', project_name:'')
    @name = name
    @project_name = project_name
   end

  def persisted?
    false
  end

  def self.model_name
    ActiveModel::Name.new(self, nil, "ProjectForm")
  end

  delegate :name, :email, to: :user
  delegate :project_name, to: :project # PROBLEM: project has #name not #project_name method

  def user
    @user ||= User.new
  end

  def project
    @project ||= Project.new
  end

end

主要问题在于代码的初始化和委托部分,因为Project和User都有一个字段名,因此我在初始化时不能同时使用@name.有没有办法做类似的事情

delegate name: :project_name?

谢谢！

你可以使用前缀

class UserForm
  include ActiveModel::Model

   def initialize(name:'', project_name:'')
    @name = name
    @project_name = project_name
   end

  def persisted?
    false
  end

  def self.model_name
    ActiveModel::Name.new(self, nil, "ProjectForm")
  end

  delegate :name, :email, to: :user, prefix: true
  delegate :name, to: :project, prefix: true

  def user
    @user ||= User.new
  end

  def project
    @project ||= Project.new
  end

end

更多信息：http://apidock.com/rails/Module/delegate

现在,您可以调用这样的前缀方法：

UserForm.new.user_name
UserForm.new.project_name