Rails 3:移动MIME类型在尝试使用JavaScript加载内容后引发406错误

Question

我正在关注Railscast#199,以便在移动浏览器中查看我的网络应用程序.除非我尝试在移动版本中使用UJS访问选项卡式界面中的信息,否则它的效果很好.单击选项卡可在Web应用程序中运行,但在移动端,我收到406错误.(我在Safari中将用户代理设置为iPhone后尝试了这一点.我还在iOS模拟器和我的iPhone上进行了测试.两者都没有加载任何东西.)

下面是其中一个选项卡的一些代码.任何人都可以帮我定位正在发生的事情吗？这是我的代码.

以下是profile_about操作profiles_controller.rb:

def profile_about
  @profile = Profile.find(params[:id])
  respond_to do |format|
    format.js { render :layout => nil }
  end
end

在我profiles/show.mobile.erb(这是完全相同的代码profiles/show.html.erb):

<div id="tabs">
  <ul id="infoContainer">
    <li><%= link_to "Cred", profile_cred_profile_path, :class=> 'active', :remote => true %></li>
    <li><%= link_to "About", profile_about_profile_path, :class=> 'inactive', :remote => true %></li>
  </ul>
  <div id="tabs-1">
  <%= render :partial => 'profile_cred' %>
  </div>
</div><!-- end tabs -->

(注意:我有一个文件profiles/_profile_about.html.erb和profiles/_profile_about.mobile.erb.)

这是我的profiles/profile_about.js.erb:

$("#tabs-1").html("<%= escape_javascript(render(:partial => 'profile_about'))%>");

我的Heroku日志显示406:

2012-03-08T03:02:55+00:00 app[web.1]: Started GET "/profiles/1/profile_about" for 98.218.231.113 at 2012-03-08 03:02:55 +0000
2012-03-08T03:02:55+00:00 heroku[router]: GET myapp.com/profiles/1/profile_about dyno=web.1 queue=0 wait=0ms service=14ms status=406 bytes=1
2012-03-08T03:02:55+00:00 app[web.1]:   Processing by ProfilesController#profile_about as JS
2012-03-08T03:02:55+00:00 app[web.1]:   Parameters: {"id"=>"1"}
2012-03-08T03:02:55+00:00 app[web.1]: Completed 406 Not Acceptable in 3ms
2012-03-08T03:02:55+00:00 heroku[nginx]: 98.218.231.113 - - [08/Mar/2012:03:02:55 +0000] "GET /profiles/1/profile_about HTTP/1.1" 406 1 "http://myapp.com/profiles/1" "Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3" myapp.com

从跑步tail -f logs/development.log:

Started GET "/profiles/1/profile_about" for 127.0.0.1 at Wed Mar 07 22:35:36 -0500 2012
  Processing by ProfilesController#profile_about as JS
  Parameters: {"id"=>"1"}
  PK and serial sequence (5.4ms)   SELECT attr.attname, seq.relname
 FROM pg_class seq,
 pg_attribute attr,
 pg_depend dep,
 pg_namespace name,
 pg_constraint cons
 WHERE seq.oid = dep.objid
 AND seq.relkind = 'S'
 AND attr.attrelid = dep.refobjid
 AND attr.attnum = dep.refobjsubid
 AND attr.attrelid = cons.conrelid
 AND attr.attnum = cons.conkey[1]
 AND cons.contype = 'p'
 AND dep.refobjid = '"goals_profiles"'::regclass
  PK and custom sequence (2.5ms)   SELECT attr.attname,
 CASE
 WHEN split_part(def.adsrc, '''', 2) ~ '.' THEN
 substr(split_part(def.adsrc, '''', 2),
 strpos(split_part(def.adsrc, '''', 2), '.')+1)
 ELSE split_part(def.adsrc, '''', 2)
 END
 FROM pg_class t
 JOIN pg_attribute attr ON (t.oid = attrelid)
 JOIN pg_attrdef def ON (adrelid = attrelid AND adnum = attnum)
 JOIN pg_constraint cons ON (conrelid = adrelid AND adnum = conkey[1])
 WHERE t.oid = '"goals_profiles"'::regclass
 AND cons.contype = 'p'
 AND def.adsrc ~* 'nextval'

  Profile Load (1.3ms)  SELECT "profiles".* FROM "profiles" WHERE "profiles"."id" = '1' LIMIT 1
Completed 406 Not Acceptable in 30ms

Answer 1

事实证明，这是由于该prepare_for_mobile方法中缺少对 xhr 请求的检查。我在另一个问题中找到了答案。所以下面的prepare_for_mobile方法可以让JS工作：

def prepare_for_mobile
  session[:mobile_param] = params[:mobile] if params[:mobile]
  request.format = :mobile if mobile_device? && !request.xhr?
end