cxh116 (曹小华) · 回帖

曹小华

高级会员

第 17 位会员 / 2011-10-31

长沙

55 篇帖子 / 541 条回帖

19 关注者

0 正在关注

31 收藏

GitHub Public Repos

leek 52

跨交易所套利框架.基于 Python asyncio, CCXT, WebSocket.
alipay_red_helper 38

支付宝抓红包助手
ccxtws 32

基于 CCXT 和 WebSocket 对接交易深度数据
mow 28

运行 Leek 项目的套利程序
generalstorefrontend 8
mangege.github.io 7

我的博客,基于Jekyll
kimi 7

一个基于ansible自动配置linux服务器项目
generalstorebackend 6
discourse_shell 5

不使用 Docker 部署 Discourse
lede-source 4

LEDE with various device support

More on GitHub

没法科学上网的时候如何使用 Google 搜索引擎 at 2015年07月07日

这个不错，简单的对比了几个关键词，与 google 的搜索结果是一致的
高并发下，第三方登陆的疑问 at 2015年07月03日

怕登录的第三方接口调用阻塞影响业务的响应时间，可以考虑把登录交给单独的 unicorn 比如在 nginx 配置第三方登录的路径走指定另外的 unicorn. 或直接把登录和用户相关的抽出来，用另外一个子域名，做成 passport 服务
准备入 Ruby on Rails 坑了，你们有什么要说的吗？ at 2015年05月12日

都去玩 elixir
来斗鱼看逗逼程序员直接写 Ruby 代码 at 2015年02月12日

#27 楼 @mogodb 昨天第一次，试一下 ffmpeg 命令参数而已昨天晚上有直播的 http://v2ex.com/t/170296#reply26
来斗鱼看逗逼程序员直接写 Ruby 代码 at 2015年02月12日

#25 楼 @mogodb 在上班，考虑到公司方面的原因，所有没有播了，以后晚上 22:22 娱乐上演
Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日

用过 vmware esxi 的管理界面，可以把机器的主频限制为 1Ghz
Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日

#6 楼 @zwyan2009 系统是直接装在物理机上面，还是有虚拟化？如果有虚拟机，有没有限制 cpu 的使用频率？
Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日
#4 楼 @zwyan2009 可以把两台机器 cpu 的型号贴出来吗？

i3 CPU M 380 @ 2.53GHz
```
costs = Benchmark.realtime {Time.now.at_beginning_of_month} *1000
 => 0.234701
```
Time.now.at_beginning_of_month 耗时问题 at 2015年02月09日

服务器的 cpu 有些性能非常非常低，特别是 vps，连跟奔 4 的 CPU 都没得比
字符串数组之间的转换 at 2015年02月02日

'abc'.split('')
Yosemite 系统取消搜索功能，就不卡啦 at 2015年01月17日

只索引应用程序就行了
怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月12日

#6 楼 @quakewang 错误日志提示 unicorn 是打印的文本就是这样的 http://underthehood.meltwater.com/blog/2014/03/21/debugging-unicorn-rails-timeouts/

#5 楼 @hooooopo

谢谢你们的帮忙，问题暂时算解决了。把数据库迁移到 web 服务器上面来没有发现问题了。数据库服务器是他们甲方配置的，还安装了什么"帕拉迪统一安全管理与综合审计",看这软件的介绍是对系统底层修改蛮大的

怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月11日

#5 楼 @hooooopo 后台加上 timeout 的日志，现在会报数据库连接问题，有可能是数据库的问题。之前 web 服务与 mysql 都是同一台机器，这个项目是他们要求数据库分离，所以他们另外配置了一台机器。也许是那边的问题，也许是内网网络环境的问题。这边准备把它放一台机器上面再来试试

之前没有出现数据库获取不到连接的问题，是加了 LogBeforeTimeout 才出现，也许是 LogBeforeTimeout 另外起线程导致每次都要获取新的 mysql 连接。但 mysql 的最大连接数已经设置为 256 了，两个进程，共 64 个线程，感觉连接数应该够用了

没有用到 redis 与 memcache. newrelic 准备试试. puma 有个 stdout_redirect 配置参数，也准备来试试

cat log/production.log| grep -v INFO

W, [2015-01-11T08:56:13.948047 #15273]  WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :(
F, [2015-01-11T08:56:15.951826 #15273] FATAL -- : 
ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)):
  config/initializers/log_before_timeout.rb:15:in `call'


W, [2015-01-11T08:56:16.535154 #15277]  WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :(
F, [2015-01-11T08:56:18.539041 #15277] FATAL -- : 
ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)):
  config/initializers/log_before_timeout.rb:15:in `call'


W, [2015-01-11T08:56:36.107301 #15273]  WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :(
F, [2015-01-11T08:56:38.111343 #15273] FATAL -- : 
ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)):
  config/initializers/log_before_timeout.rb:15:in `call'


W, [2015-01-11T08:56:38.654370 #15277]  WARN -- : /api/users/login? I’m about to timeout bringing down my unicorn worker too :(
F, [2015-01-11T08:56:40.658041 #15277] FATAL -- : 
ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)):
  config/initializers/log_before_timeout.rb:15:in `call'


W, [2015-01-11T08:59:19.421961 #15277]  WARN -- : /farm_products/140? I’m about to timeout bringing down my unicorn worker too :(
F, [2015-01-11T08:59:21.425568 #15277] FATAL -- : 
ActiveRecord::ConnectionTimeoutError (could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)):
  config/initializers/log_before_timeout.rb:15:in `call'

怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月10日

#2 楼 @quakewang 并发不高，晚上 0 点时也出现这种情况，那个时候基本上几分钟一个请求

ulimit -a 结果

core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 63706
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 63706
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

尝试过 ab 简单测试首页，1w 个请求，100 个并发，失败请求数为 0，也没有看到超时，首页最少查了 4 张表

这台物理机上面放的虚拟机蛮多的，会不会是因为 CPU 没有限制，某些虚拟机把 CPU 占用完了而导致超时？

manor    15270  0.0  1.4 291476 115020 ?       Sl   09:19   0:04 puma 2.10.2 (tcp://127.0.0.1:9292)                                                                                                                
manor    15273  1.5  3.0 1321304 252220 ?      Sl   09:19  12:08 puma: cluster worker 0: 15270                                                                                                                     
manor    15277  1.6  3.0 1318972 251180 ?      Sl   09:19  12:54 puma: cluster worker 1: 15270

rails log, 这是今天上午以来的超时日志，像 squog48480.txt 这个路径是不存在的，是别人在扫描，但也超时了 8 秒钟

W, [2015-01-10T14:10:12.408338 #15273]  WARN -- : /admin/pay_details?utf8=%E2%9C%93&q%5Border_number_cont%5D=&q%5Bpay_order_product_orders_order_number_eq%5D=150109455847&commit=%E6%90%9C%E7%B4%A2 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:10:44.467813 #15273]  WARN -- : /admin/pay_details?utf8=%E2%9C%93&q%5Border_number_cont%5D=&q%5Bpay_order_product_orders_order_number_eq%5D=150109580972&commit=%E6%90%9C%E7%B4%A2 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:25:57.898674 #15273]  WARN -- : /admin/pay_details/415? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:36:19.919086 #15273]  WARN -- : /products/7? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:36:24.623033 #15273]  WARN -- : /admin/pay_details/415? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:36:40.778678 #15273]  WARN -- : /products/7? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:39:51.156973 #15273]  WARN -- : /admin/product_orders? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:42:20.671041 #15273]  WARN -- : /admin/manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:42:22.235304 #15273]  WARN -- : /admin/manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T14:56:17.433214 #15273]  WARN -- : /farm_products/151? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T15:28:11.755474 #15273]  WARN -- : /admin/login? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T15:28:19.967264 #15273]  WARN -- : /admin/coupons/1? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:09:20.641891 #15273]  WARN -- : /farm_products/203?from=singlemessage&isappinstalled=0 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:09:44.190186 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:58.509238 #15273]  WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:58.509812 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:58.512869 #15273]  WARN -- : /about? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:58.513834 #15273]  WARN -- : /farm_products? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:58.520793 #15273]  WARN -- : /farm_products/203? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:59.594871 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:59.618843 #15273]  WARN -- : /manors? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:59.632609 #15273]  WARN -- : /login? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:28:59.632963 #15273]  WARN -- : /farm_products/list?cid=1 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:08.643499 #15273]  WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:08.646714 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:09.600770 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:13.687735 #15273]  WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:13.695943 #15273]  WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:13.695795 #15273]  WARN -- : /manors/28? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:15.992802 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:15.994440 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:15.995973 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:16.003169 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:16.006432 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:16.013690 #15273]  WARN -- : /farm_products/204? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:29:19.624268 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T16:30:02.932361 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T17:17:48.064364 #15273]  WARN -- : /products/23? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T17:18:29.761654 #15273]  WARN -- : /farm_products/151? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T17:23:53.770625 #15273]  WARN -- : /farm_products/168? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T17:30:08.645647 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T17:31:42.602090 #15273]  WARN -- : /mapi/merchants/login? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:23:42.086524 #15273]  WARN -- : /manors/27? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:24:09.796062 #15273]  WARN -- : /farm_products/209? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:24:21.304103 #15273]  WARN -- : /user_coupons? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:24:24.149114 #15273]  WARN -- : /pay_orders/274? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:24:41.174035 #15273]  WARN -- : /user_coupons? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:24:56.974919 #15273]  WARN -- : /user_coupons? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:25:31.223952 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:27:28.185707 #15273]  WARN -- : /pay_orders/from_product_order?product_order_id=321 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:27:31.065133 #15273]  WARN -- : /products/4? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:27:49.097025 #15273]  WARN -- : /farm_products/131? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:28:17.217875 #15273]  WARN -- : /tourism_products/14? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:28:28.265505 #15273]  WARN -- : /pay_orders/277/go? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:28:46.029485 #15273]  WARN -- : /notes/4? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:47:42.219719 #15273]  WARN -- : /farm_products/list?cid=4 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:47:43.973957 #15273]  WARN -- : /farm_products/list?cid=4 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T18:48:05.570790 #15273]  WARN -- : /farm_products/list?cid=2&page=2 I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T19:57:21.140408 #15273]  WARN -- : /buddies/new? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:01:20.062225 #15273]  WARN -- : /manors/3? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:03:00.752695 #15273]  WARN -- : /manors/3? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:28:55.244187 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:30:42.501772 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:36:58.784065 #15273]  WARN -- : /activities? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:40:28.962651 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:41:06.718788 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:47:15.851442 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:56:22.624565 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T20:59:53.813606 #15273]  WARN -- : /uztce33383.txt? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:02:09.573501 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:08:49.833639 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:10:52.103289 #15273]  WARN -- : /squog48480.txt? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:19:50.979843 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:38:22.530999 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:44:01.503328 #15273]  WARN -- : /farm_products/165? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T21:54:59.149493 #15273]  WARN -- : /forget? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T22:00:11.402326 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T22:03:53.743778 #15273]  WARN -- : /manor_product? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T22:04:54.059040 #15273]  WARN -- : /? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T22:31:22.260466 #15273]  WARN -- : /tourism_products/6? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T22:41:30.776601 #15273]  WARN -- : /products/40? I’m about to timeout bringing down my unicorn worker too :(
W, [2015-01-10T22:41:40.844292 #15273]  WARN -- : /products/40? I’m about to timeout bringing down my unicorn worker too :(

怎么查 Rails 应用的灵异问题? (结帖,问题解决,但具体原因不清楚) at 2015年01月10日

#1 楼 @huacnlee nginx site conf

server {
    listen       80;
    server_name  www.xxx.com;

    root   /home/manor/app/current/public;

    access_log  /var/log/nginx/xxx.com.access.log  main;

    error_page  404              /404.html;
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
        expires 30d;
        access_log off;
    }

    location / {
        index  index.html;
        try_files $uri @manorpuma;
    }

    location @manorpuma {
        proxy_set_header  X-Real-IP        $remote_addr;
        proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
        proxy_set_header  Host             $http_host;
        proxy_redirect    off;
        proxy_pass   http://127.0.0.1:9292;
    }
}

nginx conf

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';


    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;
    server_tokens off;

    client_max_body_size 10m;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

puma conf

base_name = 'manor'

directory "/home/#{base_name}/app/current"

worker_timeout 10
workers 2
threads 8,32
#bind "unix:///home/#{base_name}/app/current/tmp/puma.sock?mask=0777"
bind "tcp://127.0.0.1:9292"
pidfile "/home/#{base_name}/app/current/tmp/puma.pid"
state_path "/home/#{base_name}/app/current/tmp/puma.state"

preload_app!

on_worker_boot do
  #$redis.client.reconnect

  ActiveRecord::Base.connection.reconnect!
end

502 请求出现的路径也是随机的，也的只是后台简单的单表查询

为何淘宝有那么多便宜 VPS 的原因？ at 2015年01月10日

#11 楼 @764664 用过低价劣质的 VPS，在淘宝买个国内的 VPS 来玩，无公网 IP，只能手动映射几个端口。到晚上 ls 命令真的是要 10 秒左右

低价优质的有，但很难买到。因为别人是卖完名额就不再卖了.超售不太严重
为何淘宝有那么多便宜 VPS 的原因？ at 2015年01月09日

#4 楼 @luffycn 当你在那台 VPS 上面运行一下 ls 命令都要等 10 秒就会明白一分钱一分货
寻找一个创业技术合伙人 at 2015年01月03日

产品经理就不要抢架构师这个马甲了，你让程序员还怎么混 -_-
捣鼓算法有意义么? at 2014年12月23日

学习怎么写出最好的代码
在某些现状上，今天的 Ruby 就如同 8 年前的 PHP at 2014年12月19日

非一线城市，不要在主要业务是外包项目的公司推小众语言。到时有更好的工作机会，走是个难题. 从年初做到年底，20 人左右的开发组，去年在的码农只剩两三个，还有一个计划年后走。外包水深，慎重

python 与 ruby 在 web 领域也发展了这么多年，没有在企业建站这种草根领域发展，注定是小众的语言. php 是跟 asp 抢企业建站的领域，从 Drupal 还这么火知道是 PHP 赢了
难以忍受 Yosemite 卡顿，看看抹盘重装看看如何 at 2014年11月28日

#27 楼 @kewin 电池还能用三个小时
难以忍受 Yosemite 卡顿，看看抹盘重装看看如何 at 2014年11月27日

09 年的 macbook，还是用机械硬盘。平常用 vim,chrome 不卡. 刚开机无缓存应用数据到内存时一般会很卡。

10.10.1 的 wifi 有时还是会断
有必要用 rails_admin 吗？ at 2014年09月21日

自己写生成器 http://guides.rubyonrails.org/generators.html
咨询：高手都是如何高效便捷的处理 Windows 下的中文路径编码问题 at 2014年09月04日

用 python
新项目用了 4.1，发现 enum 没有 i18n 的支持 at 2014年09月04日

stackoverflow 上有个简单的实现，你可以看看 http://stackoverflow.com/questions/22827270/how-to-use-i18n-with-rails-4-enums
有网页界面配置角色权限的 Rails 的开源系统参考吗? at 2014年08月29日

#1 楼 @dddd1919 这个方案权限的配置还是通过代码来配置，希望能够通过界面操作配置角色的权限
前端招聘中，“熟悉一门后端语言” 具体是什么要求？ at 2014年08月23日

意思就是当后端没人了，你就是后端。前端不过是作为后端的技能里面的一种
启动 rails server 命令，时好时坏~囧，求病根在哪！ at 2014年07月22日
1. 运行 rails server 会显示帮助，是因为你没有在 rails 项目的根目录下运行
2. rvm 之前是用.rvmrc 文件控制 ruby 与 gemset 的自动切换，新版的 rvm 是用.ruby-gemset 和.ruby-version 控制，一般这三个文件在 git 里面要全局忽略
在工程目录下，运行下面命令 rvm use ruby-2.1.1@kitty --ruby-version

记得把 ruby-2.1.1 换成你的 ruby 版本，kitty 换成你的 gmeset 名，--ruby-version 参数是生成.ruby-gemset 和.ruby-version 文件

你可以运行rvm help use查看 use 指令的具体使用方法 https://rvm.io/workflow/projects#ruby-versions