在Ruby on Rails中将类拆分为多个文件

Question

我正在尝试将大型模型拆分为多个文件以进行逻辑组织.所以我有两个文件:

model1.rb

class Model1 < ActiveRecord::Base
  before_destroy :destroying
  has_many :things, :dependent=>:destroy

  def method1
    ...
  end
  def method2
    ...
  end

end
require 'model1_section1'

model1_section1.rb

class Model1
  def method3
    ...
  end
  def self.class_method4
    ...
  end
end

但是当应用程序加载,并且调用Model1.class_method4时,我得到:

undefined method `class_method4' for #<Class:0x92534d0>

我也尝试过这个要求:

require File.join(File.dirname(__FILE__), 'model1_section1')

我在这做错了什么？

Answer 1

我知道我有点迟到了,但我刚刚在我的一个应用程序中做了这个,所以我想发布我使用过的解决方案.

我们这是我的模特:

class Model1 < ActiveRecord::Base

  # Stuff you'd like to keep in here
  before_destroy :destroying
  has_many :things, :dependent => :destroy

  def method1
  end
  def method2
  end

  # Stuff you'd like to extract
  before_create :to_creation_stuff
  scope :really_great_ones, #...

  def method3
  end
  def method4
  end
end

你可以将它重构为:

# app/models/model1.rb
require 'app/models/model1_mixins/extra_stuff'
class Model1 < ActiveRecord::Base

  include Model1Mixins::ExtraStuff

  # Stuff you'd like to keep in here
  before_destroy :destroying
  has_many :things, :dependent => :destroy

  def method1
  end
  def method2
  end
end

和:

# app/models/model1_mixins/extra_stuff.rb
module Model1Mixins::ExtraStuff

  extend ActiveSupport::Concern

  included do
    before_create :to_creation_stuff
    scope :really_great_ones, #...
  end

  def method3
  end
  def method4
  end
end

由于额外的清洁度,它完美地运作ActiveSupport::Concern.希望这能解决这个老问题.

Answer 2

这篇文章很好地提出了解决这个问题的方法:

http://blog.codeclimate.com/blog/2012/10/17/7-ways-to-decompose-fat-activerecord-models/