0

我有...

/app/models/survey.rb：

class Survey < ActiveRecord::Base

  has_many :results
  belongs_to :competitor
  after_commit :create_matching_results  
  attr_accessible :results_attributes
  accepts_nested_attributes_for :results
  after_commit :create_matching_results
  def create_matching_results
    unless self.destroyed?
      self.fields.each do |field|
        result = survey.results.find_or_create_by_survey_id_and_field_id(self.id, field_id)
        result.update_attributes :competitor_id => competitor.id
      end
    end
  end
end

/app/models/result.rb：

class Result < ActiveRecord::Base
  attr_accessible :field_id, :survey_id, :competitor_id, :value, :selected, :name
  belongs_to :survey
end

/app/controllers/surveys_controller.rb：

class SurveysController < ApplicationController  
  def edit
    @competitor = Competitor.find(params[:competitor_id])
    @survey = @competitor.surveys.find(params[:id])
  end
  def update
    @competitor = Competitor.find(params[:competitor_id])
    @survey = @competitor.surveys.find(params[:id])
    @result_ids = params[:survey]["result_ids"]
    @survey.results.each do |result|
      result.update_attributes :selected => true if result.id == @result_ids.to_i
      result.update_attributes :selected => false unless result.id == @result_ids.to_i
    end
    flash[:notice] = "Survey was successfully updated. (#{undo_link(@survey)}.)" if @survey.update_attributes(params[:survey])
    respond_with(@competitor, @survey)
  end
end

/app/views/surveys/_form.html.haml：

= simple_form_for [@competitor, @survey] do |f|
  = f.collection_radio_buttons :result_ids, @survey.results, :id, :name
  = f.button :submit, :id => 'submit_survey'

现在让我们假设@survey.results.count == 2。然后，我会在我的表单中得到一些可爱的 HTML：

<form accept-charset="UTF-8" action="/competitors/13/surveys/80" class="simple_form edit_survey" id="edit_survey_80" method="post" novalidate="novalidate">
  <input id="survey_result_ids_673" name="survey[result_ids]" type="radio" value="673" />
  <label class="collection_radio_buttons" for="survey_result_ids_673">one</label>
  <input id="survey_result_ids_672" name="survey[result_ids]" type="radio" value="672" />
  <label class="collection_radio_buttons" for="survey_result_ids_672">two</label>
  <input class="btn" id="submit_survey" name="commit" type="submit" value="Update Survey" />
</form>

到目前为止，一切都很好。

当我选择这两个单选按钮之一时，我的参数如下所示：

{"utf8"=>"✓",
 "_method"=>"put",
 "authenticity_token"=>"etc...",
 "survey"=>{"result_ids"=>"672"},
 "commit"=>"Update Survey",
 "action"=>"update",
 "controller"=>"surveys",
 "competitor_id"=>"13",
 "id"=>"80"}

因此，我希望将 的selected值Result.find(672)设置为，并将其他结果true的selected值设置为false。相反，我发现另一个结果被完全删除了。这是怎么回事？我该如何解决？

更新：

例如，我以@survey.results.count == 4,开头results.selected == false。然后我在 Rspec 中执行以下操作：

visit edit_competitor_survey_path(@competitor, @survey)
  choose "Standard practice"
  @dummy = @survey.results.map{|result| [result.name, " - ", result.selected].join}
  click_on "submit_survey"
  @survey.results.reload.map{|result| [result.name, " - ", result.selected].join}.should == @dummy

然后我得到：

Failure/Error: @survey.results.reload.map{|result| [result.name, " ", result.selected].join}.should == @dummy
       expected: ["Best practice - false", "Good practice - false", "Standard practice - false", "Bad practice - false"]
            got: ["Standard practice - true"] (using ==)

（并不是说我希望 'before' 和 'after' 值相等。这个技巧只是在 Rspec 测试失败消息中显示这两个值的一种方便方法。）

4

1 回答 1

0

答案是删除accepts_nested_attributes_for，因为我已经直接设置了我的结果值。

class Survey < ActiveRecord::Base
  belongs_to :competitor
  attr_accessible :selection
  attr_accessor :selection
  has_many :results
  belongs_to :question
end

class SurveysController < ApplicationController
  def update
    @competitor = Competitor.find(params[:competitor_id])
    @survey = @competitor.surveys.find(params[:id])
    @result_ids = params[:survey]["selection"]
    @survey.results.each do |result|
      result.update_attributes :selected => true if result.id == @result_ids.to_i
      result.update_attributes :selected => false unless result.id == @result_ids.to_i
    end
    flash[:notice] = "Survey was successfully updated. (#{undo_link(@survey)}.)" if @survey.update_attributes(params[:survey])
    respond_with(@competitor, @survey)
  end  
end

= simple_form_for [@competitor, @survey] do |f|
  = f.collection_radio_buttons :selection, @survey.results, :id, :name
  = f.button :submit, :id => 'submit_survey'
于 2013-05-13T00:01:44.313 回答