在使用Pow和Nginx的开发中，文件上载不适用于Rails 4

我正在使用Pow和Nginx在开发中提供我的Rails 4应用程序。一个简单的文件上传返回500错误，并且请求未到达Rails控制器。我认为是这种情况，因为在Rails日志中没有提及该请求。没有提到错误，我不确定这里出了什么问题。

我从上载Ajax文件开始，但是用一个也不起作用的简单表格代替了它。

试过这个

然后去这个

当前avatar.html.erb

<%= form_for @user, html: { multipart: true }, method: "post", url: '/settings/avatar/update', class: "", id: "update_avatar" do |f| %>
  <%= f.file_field :avatar, class: 'js-upload-photo-button js-change-avatar-btn', accept: 'image/png,image/gif,image/jpeg,image/jpg' %>
    <%= f.submit "Upload" %>
<% end %>

在Chrome中请求标题

扩展的请求标头部分

nginx.log

127.0.0.1 - - [01/Feb/2014:11:28:26 +0530] "POST /settings/avatar/update HTTP/1.1" 500 643 "https://allotrop.dev/settings/avatar" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.77 Safari/537.36"

战俘access.log

[Sat Feb 01 2014 11:28:26 GMT+0530 (IST)] INFO [127.0.0.1] GET allotrop.dev /500.html

There are other questions here about Rails returning 500 error with no mention in log rails 500 error no production log entry , Rails 3.2.13, 500 error in development with no log and How to properly diagnose a 500 error (Rails, Passenger, Nginx, Postgres)

But these are one-off errors and do not seem related to the problem I am facing. It would be great if anyone can point me in the right direction.

Update 1

Relevant line from routes.rb

post '/settings/avatar/update', to: 'settings#update_avatar'

Update 2

Found my nginx error log. BTW, if you are using Homebrew, it is at /usr/local/Cellar/nginx/1.4.0/logs/error.log

nginx/error.log

2014/02/01 13:05:54 [crit] 8787#0: *85813 open() "/usr/local/var/run/nginx/client_body_temp/0000000010" failed (13: Permission denied), client: 127.0.0.1, server: *.dev, request: "POST /settings/avatar/update HTTP/1.1", host: "allotrop.dev", referrer: "https://allotrop.dev/settings/avatar"