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我有一个教师档案模型,其中包含许多科目(单独的模型)。我想在同一表单上将主题添加到配置文件以创建/编辑配置文件。我正在使用accepts_nested_attributes,这对于创建来说很好。但是在编辑页面上我收到了一个非常奇怪的错误 - 而不是看到 3 个主题(我在创建时添加了三个,并且查看控制台确认了这一点),我看到了 12 个主题(!)。

#Profile model

class Profile < ActiveRecord::Base    

   has_many :subjects
   accepts_nested_attributes_for :subjects  

end

#Subject Model

class Subject < ActiveRecord::Base

 belongs_to :profile

end                 

#Profile Controller (only showing deviations from normal RESTFUL setup)

def new
 @profile = Profile.new
  3.times do
  @profile.subjects.build
 end  
 end


#Here's 1 of three parts of the subject output of = debug @profile
  errors: !ruby/object:ActiveRecord::Errors 
      base: *id004
      errors: !map:ActiveSupport::OrderedHash {}

    subjects: 
    - &id001 !ruby/object:Subject 
      attributes: 
        exam: Either
        name: "7"
        created_at: 2010-04-15 10:38:13
        updated_at: 2010-04-15 10:38:13
        level: Either
        id: "31"
        profile_id: "3"
      attributes_cache: {}

 #  Note that 3 of these attributes are displayed despite me seeing 12 subjects on screen

其他信息以防万一。

Rails:2.3.5,Ruby 1.8.7 p149,HAML,inherited_resources

我以前从来没有遇到过这么大的问题——我已经为此浪费了大约 8 个小时。非常感谢任何帮助!

感谢任何勇敢的接受者

杰克

4

1 回答 1

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原来这是编辑表单的问题。我不小心将嵌套字段块设置为 (fields_for)插入 ruby​​ 而不是评估 ruby​​ 。

因此,而不是写这个


   - form.fields_for :subjects do |ff|
    = ff.collection_select :name, Subject.all, :id, :name, :include_blank => true
    = ff.select :exam, ["Either", "Leaving Cert Only"] 
    = ff.select :level, ["Either", "Higher Level Only"]     

我写了这个:


   = form.fields_for :subjects do |ff|
    = ff.collection_select :name, Subject.all, :id, :name, :include_blank => true
    = ff.select :exam, ["Either", "Leaving Cert Only"] 
    = ff.select :level, ["Either", "Higher Level Only"]

于 2010-04-19T19:04:45.883 回答