accepted_nested_attribute_for和多個編輯

Question

從這個answer繼續，我有一個麻煩的地方accept_nested_attributes_for。第一

第一件事，這是我的錯誤代碼：

undefined method `reflect_on_association' for NilClass:Class line 39 

調用此部分中_f​​ormfield.html.haml時，我得到：

36:  = link_to "Edit list", notifications_path 
37: %br 
38: %li.tip 
39:  = link_to_add_association 'Add product codes', f, :productcodes 
40:  = f.semantic_fields_for :productcodes do |productcode| 
41:  = render 'productcode_fields', :f => productcode 
42: %br 

我使用的是軌道的3-是瑞安貝茨'Edit Multiple screencast的formtastic版本。這裏是我的代碼：

edit_multiple.html.haml

= semantic_form_for :isbn, url: { controller: 'isbns', action: 'update_multiple' }, html: { method: :put } do |f| 
    %ul 
    - @isbns.each do |isbn| 
     %li 
     = hidden_field_tag "isbn_ids[]", isbn.id 
     = isbn.descriptivedetail_titledetail_titleelement_titlewithoutprefix 
    = render 'formfields', f: f 
    = submit_tag "Submit" 

index.html.haml（編輯的相關性，所以如果一些HAML格式的都出了，這可能不是錯誤）

%td.main 
    %h1 
    ISBNs 
    %h6 
    = semantic_form_for :edit_multiple_isbns, :url => edit_multiple_isbns_path do 
    %table 
     = will_paginate  
     %tr 
     %th 
      = sortable "title", "Title"  
     - @isbns.each do |isbn| 
     %tr 
      %td 
      = check_box_tag "isbn_ids[]", isbn.id 
      %td 
      = link_to isbn.title, isbn 
    %table 
     %tr 
     = select_tag :field, options_for_select([["All Fields", ""], ["Name", "name"], ["Price", "price"], ["Category", "category_id"], ["Discontinued", "discontinued"]]) 
     = submit_tag "Edit Checked" 

的ISBN控制器：

def edit_multiple 
    @isbns = Isbn.find(params[:isbn_ids]) 
end  

def update_multiple 
    @isbns = Isbn.find(params[:isbn_ids]) 
    @isbns.each do |isbn| 
    isbn.update_attributes!(params[:isbn]) 
    end 

    flash[:notice] = "Updated titles!" 
    redirect_to isbns_path 
end 

路線：

resources :isbns do 
    collection do 
     post 'edit_multiple' 
     put 'update_multiple' 
    end 
    end 

書號型號：

has_many :productcodes, :dependent => :destroy 
    accepts_nested_attributes_for :productcodes, :allow_destroy => true 

最後，_formfields.html.haml，部分被投擲的錯誤：

%a{:name => "Identifiers"} 
%h6 Identifiers 
#this works fine... 
= f.inputs :name => "Identifier Information", :class => "main" do 
    %li.tip 
    = tooltip(:istc_id, :hover) 
    = f.input :istc_id, :label_method => :title_title_text, :as => :select, :collection => Istc.all 
#this nested one throws the error... 
    %br 
    %li.tip 
    = link_to_add_association 'Add product codes', f, :productcodes 
    = f.semantic_fields_for :productcodes do |productcode| 
     = render 'productcode_fields', :f => productcode 
    %br 

下面是它的部分，_productcodes：

.nested-fields 
    = f.inputs do 
    %br 
    %li.tip 
     = tooltip(:test, :hover) 
    = f.input :idvalue, :label => "Product code" 
    %br 
    %li.tip 
     = tooltip(:test, :hover) 
    = f.input :idtype, :label => "Product code type", :as => :select, :collection => Identifier.all, :value_method => :code 
    %li.list 
     = link_to "Edit list", identifiers_path  
    %br 
    %li.tip 
     .links 
     = link_to_remove_association "Remove product code", f 

Other answers已建議更改semantic_form_for :isbn實例變量，但在這種情況下，它會拋出：

undefined method `model_name' for NilClass:Class 

更新//

在下面的答案代碼屈從於HAML的規則，併產生一個形式在edit_multiple顯示每個記錄。這解決了與這個調整：

= semantic_form_for :isbn, :url => {:controller => 'isbns', :action => 'update_multiple'}, :html=>{:method=>:put} do |f| 
    %ul 
    - for isbn in @isbns 
     %li 
     = hidden_field_tag "isbn_ids[]", isbn.id 
     = isbn.descriptivedetail_titledetail_titleelement_titlewithoutprefix 
    = f.fields_for 'isbns[]', isbn do |ff| 
     = render 'formfields', :f => ff 

    = submit_tag "Submit" 

但在提交我得到這個錯誤：

500 Internal Server Error 

If you are the administrator of this website, then please read this web application's log file and/or the web server's log file to find out what went wrong. 

，並將日誌說：

Error during failsafe response: ActionView::Template::Error 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.0.6/lib/active_support/whiny_nil.rb:48:in `method_missing' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/http/parameters.rb:10:in `parameters' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb:3:in `___sers__mma__rvm_gems_ruby_______p____rails_tutorial_gems_actionpack_______lib_action_dispatch_middleware_templates_rescues_diagnostics_erb___945168515264926955_2203247360__4560118438262045809' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_view/template.rb:135:in `block in render' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.0.6/lib/active_support/notifications.rb:54:in `instrument' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_view/template.rb:127:in `render' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_view/render/rendering.rb:59:in `block in _render_template' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.0.6/lib/active_support/notifications.rb:52:in `block in instrument' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.0.6/lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.0.6/lib/active_support/notifications.rb:52:in `instrument' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_view/render/rendering.rb:56:in `_render_template' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_view/render/rendering.rb:26:in `render' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/haml-3.1.2/lib/haml/helpers/action_view_mods.rb:13:in `render_with_haml' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/middleware/show_exceptions.rb:88:in `rescue_action_locally' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/middleware/show_exceptions.rb:68:in `render_exception' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/middleware/show_exceptions.rb:59:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/railties-3.0.6/lib/rails/rack/logger.rb:13:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/rack-1.2.3/lib/rack/runtime.rb:17:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/activesupport-3.0.6/lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/rack-1.2.3/lib/rack/lock.rb:11:in `block in call' 
    <internal:prelude>:10:in `synchronize' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/rack-1.2.3/lib/rack/lock.rb:11:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/middleware/static.rb:30:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/railties-3.0.6/lib/rails/application.rb:168:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/railties-3.0.6/lib/rails/application.rb:77:in `method_missing' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/railties-3.0.6/lib/rails/rack/log_tailer.rb:14:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/rack-1.2.3/lib/rack/content_length.rb:13:in `call' 
    /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/rack-1.2.3/lib/rack/handler/webrick.rb:52:in `service' 
    /Users/Emma/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' 
    /Users/Emma/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' 
    /Users/Emma/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' 


Started POST "/isbns/update_multiple" for 127.0.0.1 at 2011-07-08 13:01:12 +0100 

TypeError (expected Array (got Hash) for param `isbns'): 


Rendered /Users/Emma/.rvm/gems/ruby-1.9.2-p180@rails3tutorial/gems/actionpack-3.0.6/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (0.8ms) 

///////// //// 更新：得到它部分工作，但不適用於更新操作之前的預先存在記錄的嵌套模型，它會拋出：

Couldn't find Productcode with ID=13495 for Isbn with ID=3438 

的ISBN控制器：

def update_multiple 
    @isbns = Isbn.find(params[:isbn_ids]) 
    @isbns.each do |isbn| 
     isbn.send :attributes=, params[:isbn][:isbns], false 
     isbn.save! 
    end 
    flash[:notice] = "Updated titles!" 
    redirect_to isbns_path 
    end 

書號型號：

attr_accessible：isbns_attributes＃奇怪，因爲這是ISBN模式，但心裏很不舒服，它的工作原理。

_edit_multiple中的ISBN查看：

= semantic_form_for :isbn, @isbn, :url => {:controller => 'isbns', :action => 'update_multiple'}, :html=>{:method=>:put} do |f| 
    %ul 
    - for isbn in @isbns 
     %li 
     = hidden_field_tag "isbn_ids[]", isbn.id 
     = isbn.descriptivedetail_titledetail_titleelement_titlewithoutprefix 
    = f.fields_for 'isbns', isbn do |ff| 
     = render 'formfields', :f => ff 

    = submit_tag "Submit" 

Answer 1

我覺得你的問題就出在edit.html.haml，這是不正確，如果我理解正確。

edit_multiple.html.haml

= semantic_form_for :isbn, url: { controller: 'isbns', action: 'update_multiple' }, html: { method: :put } do |f| 
    %ul 
    - @isbns.each do |isbn| 
     %li 
     = hidden_field_tag "isbn_ids[]", isbn.id 
     = isbn.descriptivedetail_titledetail_titleelement_titlewithoutprefix 
     =f.fields_for 'isbns[]', isbn do |ff| 
      = render 'formfields', f: ff 

    = submit_tag "Submit" 

然後，你將在你的諧音提供書號的對象。 如果你完全按照我的其他答案，你可以看到你缺少循環中的fields_for部分。 Railscast 198, but using formtastic

讓我知道它是否仍然不起作用。