Question

我正在尝试在我的Rails4应用程序中处理嵌套表单，但我遇到了has_one关系问题，因为所有GEM文档仅适用于has_many。当我尝试创建新的考试时，应用程序会抛出“未经许可的参数：exam_statuses”消息。可能我对单数和复数名称做错了，但是请你检查这段代码有什么问题。这是我的代码;

examination.rb：

class Examination < ActiveRecord::Base
  has_one :exam_status, dependent: :destroy
  accepts_nested_attributes_for :exam_status, :reject_if => :all_blank, :allow_destroy => true
end

examination_controller.rb：

  .....
  def new
    @examination = Examination.new
  end

  def create
    @examination = Examination.new(examination_params)
    respond_to do |format|
      if @examination.save
        format.html { redirect_to examinations_path, notice: 'success' }
      else
        format.html { render action: 'new' }
      end
    end
  end

  private
    def set_examination
      @examination = Examination.find(params[:id])
    end

    def examination_params
      params.require(:examination).permit(:name, :shortname, :fee, :exam_status => [:first_application_date, :last_application_date, :examination_id])
    end

views / examinations / new.html.erb =＆gt;

<%= simple_form_for(@examination) do |f| %>
  <%= f.input :name %>
  <%= f.input :shortname %>
  <%= f.input :fee %>
  <%= f.simple_fields_for :exam_status do |exam_status| %>
    <%= render 'exam_status_fields', :f => exam_status %>
  <% end %>
<% end %>

观点/考试/ _exam_status_fields.html.erb =＆gt;

<div class="nested-fields">
  <%= f.input :first_application_date, as: :datetime %>
  <%= f.input :last_application_date, as: :datetime %>
  <%= f.input :examination_id %>
</div>

日志文件=＆gt;

Started POST "/examinations" for 127.0.0.1 at 2014-07-03 16:43:30 +0300
Processing by ExaminationsController#create as HTML

Parameters: {"utf8"=>"✓", 

"authenticity_token"=>"uYpiZ9Z1txaJ1mib+NEAG7Ckwm9F3TyNQ6jRpYz3ncA=",
"examination"=>{"name"=>"nnnnn", "shortname"=>"nnnnnn", "fee"=>"33", 

"exam_statuses"=>{"first_application_date(3i)"=>"3", "first_application_date(2i)"=>"7", "first_application_date(1i)"=>"2014", "first_application_date(4i)"=>"16", "first_application_date(5i)"=>"43", "last_application_date(3i)"=>"5", "last_application_date(2i)"=>"7", "last_application_date(1i)"=>"2014", "last_application_date(4i)"=>"16", "last_application_date(5i)"=>"43", "examination_id"=>""}}}

Unpermitted parameters: exam_statuses

Answer 1

这里有一些问题。

<强> 1。控制器

在new方法中，您需要为exam_status构建examination：

# GET /examinations/new
def new
  @examination = Examination.new
  @examination.build_exam_status
end

在您的examination_params方法中，您需要将其更改为：

def examination_params
  params.require(:examination).permit(:name, :shortname, :fee, exam_status_attributes: [:first_application_date, :last_application_date, :_destroy])
end

请注意:exam_status需要exam_status_attributes，并且它不需要examination_id param（Rails负责处理）。另请注意，我添加了_destroy。这是用于销毁对象的标志。

<强> 2。嵌套字段部分

从部分中删除examination_id字段。

<div class="nested-fields">
  <%= f.input :first_application_date, as: :datetime %>
  <%= f.input :last_application_date, as: :datetime %>
</div>

这些更改将解决问题。

Rails4和Cocoon - 如何处理Has_One关系

1 个答案: