HABTM通过复选框问题Rails 3

我一直有一个问题HABTM。当我看到他们时，我正在跟随教程，但没有运气。这里是我的代码：HABTM通过复选框问题Rails 3

class Country < ActiveRecord::Base 
    has_and_belongs_to_many :videos 
end 

class Video < ActiveRecord::Base 
    has_and_belongs_to_many :countries 
end

编辑观点：

<% for country in Country.find(:all) %> 
    <%= check_box_tag "video[country_ids][]", country.id, @video.countries.include?(country.id) %> 
    <%= label_tag "video[country_ids][]", country.name, :for => "video[country_ids][]" %><br /> 
<% end %>

显示视图：

<% for country in @video.countries %> 
    <%= country.name %><br /> 
    <% end %>

视频控制器：

def update 
    @video = Video.find(params[:id]) 
    if @video.update_attributes(params[:video]) 
     flash[:notice] = "Successfully updated video." 
     redirect_to video_url 
    else 
     render :action => 'edit' 
    end 
    end

和日志错误：

Started POST "/videos/2" for 127.0.0.1 at Tue Feb 08 15:01:33 -0600 2011 
    Processing by VideosController#update as HTML 
    Parameters: {"commit"=>"Update Video", "authenticity_token"=>"6y01pmKxB+TEG0pbU6ujDsfwzqQW9eqiXBJfPHQW5+w=", "utf8"=>"✓", "id"=>"2", "video"=>{"name"=>"Video number 1", "vimeo_id"=>"12341234", "country_ids"=>["2", "3", "4", "11", "12", "13"]}} 
    [1m[36mVideo Load (0.4ms)[0m [1mSELECT "videos".* FROM "videos" WHERE ("videos"."id" = 2) LIMIT 1[0m 
    [1m[35mCountry Load (0.4ms)[0m SELECT "countries".* FROM "countries" WHERE ("countries"."id" IN (2, 3, 4, 11, 12, 13)) 
Completed in 35ms 

ActiveRecord::StatementInvalid (Could not find table 'countries_videos'): 
    app/controllers/videos_controller.rb:31:in `update' 

Rendered /Library/Ruby/Gems/1.8/gems/actionpack-3.0.3/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.1ms) 
Rendered /Library/Ruby/Gems/1.8/gems/actionpack-3.0.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (10.6ms) 
Rendered /Library/Ruby/Gems/1.8/gems/actionpack-3.0.3/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (16.1ms)

视频表和国家/地区表不加入HABTM。它说它无法找到countries_videos表。我错过了什么？

来源

2011-02-08 Marc

那么，你有`countries_videos`表迁移？ – 2011-02-08 21:49:51

Woops。好吧，所以我没有意识到我需要实际创建这些表。现在就开始工作了。

谢谢！

来源

2011-02-08 23:52:10 Marc

HABTM通过复选框问题Rails 3

回答

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