3

我有一个带有以下 2 个模型的 Rails 3.1 应用程序

class Listing < ActiveRecord::Base
  has_many :listing_saves
end

class Team < ActiveRecord::Base
  has_many :listing_saves
  has_many :saved_listings, through: :listing_saves, source: 'listing'
end

Join 模型如下所示

class ListingSave < ActiveRecord::Base
  belongs_to :team
  belongs_to :listing
end

Mow 我认为存在拐点问题,因为每当我尝试运行我的测试时,我都会收到以下错误(这是一个错误示例和导致它的测试)

it "should return the listing saves associated with the team" do
  save = Factory :listing_save, listing: @listing, saver: @user, team: @team
  @team.listing_saves.should include save
end

Failures:

  1) Team listing_saves associations should return the listing saves associated with the team
     Failure/Error: @team.listing_saves.should include save
     NameError:
       uninitialized constant Team::ListingSafe
     # ./spec/models/team_spec.rb:55:in `block (3 levels) in <top (required)>'

好像 Rails 被单数listing_saves化为listing_safe

这是我尝试过的一些自定义变形器(不是同时尝试的)(它们都不起作用)

# config/initializers/inflections.rb
ActiveSupport::Inflector.inflections do |inflect|
  inflect.plural 'saved_listing', 'saved_listings'
  inflect.singular 'saved_listings', 'saved_listing'
  inflect.plural 'listing_save', 'listing_saves'
  inflect.singular 'listing_saves', 'listing_save'
  inflect.singular 'listing_safes', 'listing_safe'
  inflect.plural 'listing_safe', 'listing_safes'
  inflect.irregular 'listing_save', 'listing_saves'
  inflect.irregular 'saved_listing', 'saved_listings'
end

接下来我能做什么?

注意:我发现了这个类似的问题,但答案似乎没有解决我的问题

编辑 我遵循了下面的答案,所以我现在在我的config/initializers/inflections.rb

ActiveSupport::Inflector.inflections do |inflect|
  inflect.irregular 'listing_save', 'listing_saves'
end

当我打开控制台会话并运行时"listing saves".singularize,我希望得到“listing_save”。但是,似乎我的应用程序至少有一部分没有得到它,我的测试仍然像以前一样失败。(我发誓在我测试/运行应用程序之前我会重新启动我的服务器和 spork!)。

编辑 2 我为我的应用程序中的变形写了一些测试:

describe "inflection" do
  it "should singularize listing_saves properly" do
    "listing_saves".singularize.should == "listing_save"
  end

  it "should pluralize listing_save properly" do
    "listing_save".pluralize.should == "listing_saves"
  end
end

现在我遇到了这些测试通过正常的情况,但其他测试仍然失败,并出现与我之前相同的错误

NameError:
       uninitialized constant User::ListingSafe

相同的应用程序,相同的 spork 实例,加载相同的文件。这里发生了什么奇怪的事情!???

4

1 回答 1

11

您需要定义一个不规则拐点:

# Test your inflections!
> "listing_save".pluralize
=> "listing_saves" # OK!
> "listing_saves".singularize
=> "listing_safe"  # Ouch :(

# Make it smarter
ActiveSupport::Inflector.inflections { |i| 
  i.irregular 'listing_save', 'listing_saves' 
}

# Test again
> "listing_saves".singularize
=> "listing_save"  # Yay!

红宝石文档:

------------------------ ActiveSupport::Inflector::Inflections#irregular
     irregular(singular, plural)
------------------------------------------------------------------------
     Specifies a new irregular that applies to both pluralization and
     singularization at the same time. This can only be used for
     strings, not regular expressions. You simply pass the irregular in
     singular and plural form.

     Examples:

       irregular 'octopus', 'octopi'
       irregular 'person', 'people'

编辑:

一些进一步的调查 - 看起来其他人也偶然发现了同样的问题(变形与关联没有按预期工作)。所以同时你可以手动设置类名:

has_many :listing_saves, :class_name => "ListingSave"

其他人有同样的问题,并进行了额外的屈折调整。不过,我个人会选择:class_name设置:

Ruby on Rails 3.0.3 中的自定义变形问题

于 2011-07-06T23:34:17.387 回答