sensi (rr)

部署后输入网址出现这样的东西

sensi — Sat, 21 Mar 2015 14:33:24 +0800

配置完全按照下面链接进行 https://github.com/ruby-china/ruby-china/wiki/Ubuntu-12.04-%E4%B8%8A%E4%BD%BF%E7%94%A8-Nginx-Passenger-%E9%83%A8%E7%BD%B2-Ruby-on-Rails

连接不上自己的项目

nginx.conf 的配置

user root
worker_processes 4;
pid /var/run/nginx.pid;

events {
        worker_connections 768;
        # multi_accept on;
}

http {

        ##
        # Basic Settings
        ##

        sendfile on;
        tcp_nopush on;
        tcp_nodelay on;
        keepalive_timeout 65;
        types_hash_max_size 2048;
        # server_tokens off;

        # server_names_hash_bucket_size 64;
        # server_name_in_redirect off;

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

        ##
        # Logging Settings
        ##

        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;

        ##
        # Gzip Settings
        ##
gzip on;
        gzip_disable "msie6";

        # gzip_vary on;
        # gzip_proxied any;
        # gzip_comp_level 6;
        # gzip_buffers 16 8k;
        # gzip_http_version 1.1;
        # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

        ##
        # nginx-naxsi config
        ##
        # Uncomment it if you installed nginx-naxsi
        ##

        # include /etc/nginx/naxsi_core.rules;

        ##
        # Phusion Passenger config
        ##
        # Uncomment it if you installed passenger or passenger-enterprise
        ##

         passenger_root /usr/lib/ruby/vendor_ruby/phusion_passenger/locations.ini;
         passenger_ruby /home/root/.rvm/wrappers/default/ruby;

        ##
        # Virtual Host Configs
        ##

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
}


# mail {
#       # See sample authentication script at:
#       # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
#       # auth_http localhost/auth.php;
#       # pop3_capabilities "TOP" "USER";
#       # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
#       server {
#               listen     localhost:110;
#               protocol   pop3;
#               proxy      on;
#       }
#
#       server {
#               listen     localhost:143;
#               protocol   imap;
#               proxy      on;
#       }
# }

/etc/nginx/sites-enabled/example.com.conf的配置

server {
listen 80 default;
server_name boosor.com;
root /var/www/example.com/feed/public;
passenger_enabled on;
rails_env production;
}

你们更换成 taobao 的 gem 后 fetching 显示的是什么？

sensi — Thu, 19 Mar 2015 21:42:29 +0800

通过 gem sources -l 显示已经换成了https://ruby.taobao.org，为什么 bundle install 的时候依然显示的是从 Fetching version metadata from https://rubygems.org/..

因为更新 gem 的速度不是很快，所以怀疑到底是不是从 taobao 更新 gem!

SSH 连接远程服务器被拒绝

sensi — Wed, 18 Mar 2015 22:19:15 +0800

ssh 连接阿里云密码正确但是显示 Permission denied, please try again.

我在网上搜了，说是查看 mac 上的系统登陆日志，我在/var/log 下面看到了很多文件夹，找不到系统登陆日志文件。请帮忙分析一下这个问题

OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 121.199.29.224 [121.199.29.224] port 22.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load "/Users/donghaoran/.ssh/id_rsa" as a RSA1 public key
debug1: identity file /Users/donghaoran/.ssh/id_rsa type 1
debug1: identity file /Users/donghaoran/.ssh/id_rsa-cert type -1
debug1: identity file /Users/donghaoran/.ssh/id_dsa type -1
debug1: identity file /Users/donghaoran/.ssh/id_dsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH_5*
debug2: fd 3 setting O_NONBLOCK
debug3: load_hostkeys: loading entries for host "121.199.29.224" from file "/Users/donghaoran/.ssh/known_hosts"
debug3: load_hostkeys: found key type RSA in file /Users/donghaoran/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-rsa
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-rsa,ssh-dss-cert-v01@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_setup: found hmac-md5
debug1: kex: server->client aes128-ctr hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 120/256
debug2: bits set: 520/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 0e:1d:39:8c:25:8b:c0:e4:35:83:c1:cc:e6:df:d7:39
debug3: load_hostkeys: loading entries for host "121.199.29.224" from file "/Users/donghaoran/.ssh/known_hosts"
debug3: load_hostkeys: found key type RSA in file /Users/donghaoran/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug1: Host '121.199.29.224' is known and matches the RSA host key.
debug1: Found key in /Users/donghaoran/.ssh/known_hosts:1
debug2: bits set: 506/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /Users/donghaoran/.ssh/id_rsa (0x7fe0f2c12af0),
debug2: key: /Users/donghaoran/.ssh/id_dsa (0x0),
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /Users/donghaoran/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /Users/donghaoran/.ssh/id_dsa
debug3: no such identity: /Users/donghaoran/.ssh/id_dsa: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password

运行 bundle install 之后每次都要求装一个又一个 gem 不停提示

sensi — Sun, 15 Mar 2015 18:19:16 +0800

An error occurred while installing mime-types (1.25.1), and Bundler cannot continue.
Make sure that `gem install mime-types -v '1.25.1'` succeeds before bundling.

运行完一个 gem install mime-types -v '1.25.1'紧接着运行 bundle install 之后有一个新的 gem 需要安装，像这样装完一个又一个， bundle 是为了方便管理 gem 么，有么有什么更加智能的解决方法呢！

备注：在本地运行没有这样的提示，在阿里云上运行一直是这样的情况，之前项目跑的时候一直正常。

strong parameters 的参数传递问题

sensi — Fri, 06 Mar 2015 19:36:59 +0800

一个 product 有很多 articles，现在创建一个新的 article，需要把 product_id 和 article 的参数一同传到 article 的 controller，

我在网上始终没有找到传到 article 的 controller 的写法.(api 里面只是有一个例子传到 product 的 controller)，

请问 strong parameters 这部分的 product_id 参数部分怎么写就是这个部分：

def article_params
          params.require(:article).premit(:title, :content)
      end

下面是请求的参数

Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"NjwASyACrLfTKqcmwSdwbWcTJlxcsrHGGmM5AoeLM2w=",
 "article"=>{"title"=>"hello",
 "content"=>"helllo"},
 "commit"=>"Create Article",
 "product_id"=>"1"}

嵌套路由下地表单提交不成功

sensi — Wed, 04 Feb 2015 21:30:16 +0800

路由：

resources :products, :shallow => true do
  resources :articles
end

表单：

<%= form_for @article, url: new_product_article_path(@article) do |f| %>

    <p>
       <%= f.label "title" %></br>
       <%= f.text_field :title %>
    </p>

    <p>
       <%= f.label "content" %></br>
       <%= f.text_area :content %>
    </p>

    <p>
       <%= f.submit %>
    </p>
<% end %>

log:

tarted GET "/products/1/articles/new" for 127.0.0.1 at 2015-02-04 21:12:28 +0800
Processing by ArticlesController#new as HTML
  Parameters: {"product_id"=>"1"}
  Rendered articles/new.html.erb within layouts/application (2.2ms)
Completed 500 Internal Server Error in 7ms

ActionView::Template::Error (No route matches {:action=>"new", :controller=>"articles", :product_id=>nil} missing required keys: [:product_id]):
    1: <h1>New article</h1>
    2: 
    3: <%= form_for @article, url: new_product_article_path(@article) do |f| %>
    4: 
    5:  <p>
    6:        <%= f.label "title" %></br>
  app/views/articles/new.html.erb:3:in `_app_views_articles_new_html_erb___2302585143041901570_70250353575640'

(No route matches {:action=>"new", :controller=>"articles", :product_id=>nil} missing required keys: [:product_id]): product_id =》nil，这个参数是怎么通过 form_for 传递的？

Rails 3.0.5 下 rake 不能工作，怎么破？

sensi — Wed, 14 Jan 2015 21:54:39 +0800

看的书是 web 开发敏捷之道 rails 应用…第四版，使用的是 rails3.0.5。然后问题就出现了（之前用的是 4.0） rake 命令一直不能使用，出现的错误是这个样子的

rake aborted!
ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead.
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/tasks/documentation.rake:1:in `require'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/tasks/documentation.rake:1:in `<top (required)>'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/tasks.rb:15:in `load'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/tasks.rb:15:in `block in <top (required)>'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/tasks.rb:14:in `each'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/tasks.rb:14:in `<top (required)>'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/application.rb:213:in `require'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/application.rb:213:in `initialize_tasks'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/application.rb:139:in `load_tasks'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/gems/railties-3.0.5/lib/rails/application.rb:77:in `method_missing'
/Users/donghaoran/work/demo/Rakefile:6:in `<top (required)>'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/bin/ruby_executable_hooks:15:in `eval'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)
donghaorandeMacBook-Air:demo donghaoran$ rake routes

我也装逼的在 stackoverflow 上发现了一个解决之道，是修改 rakefile，哈哈最后还是不能生效，运行结果是这样的：

LoadError: cannot load such file -- tasks/rails
/Users/donghaoran/work/depot/Rakefile:8:in `require'
/Users/donghaoran/work/depot/Rakefile:8:in `<top (required)>'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/bin/ruby_executable_hooks:15:in `eval'
/Users/donghaoran/.rvm/gems/ruby-2.0.0-p481/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)

搜索发现发现是 rails3.0.5 必须使用 rake0.8.7 才行，可是 rake 现在默认的是 0.9.6，这个问题该怎么解决？

Railscasts China 为啥都没见更新了啊？

sensi — Wed, 14 Jan 2015 12:26:04 +0800

如题，每次进去发现都是一样的，什么个情况！

link_to 方法，跳转后没有请求数据，

sensi — Sat, 14 Jun 2014 19:47:47 +0800

<%= link_to "Enter", controller: "pictures", action: "show", id: "1" %>

跳转后

标签的内容没有请求回来！！！请问这个哪里出错了！！！

图片上传服务器不成功的问题用的是 carrierwave

sensi — Wed, 14 May 2014 20:02:34 +0800

在本地测试，上传成功，然后运行到服务器 (阿里云) 后，图片不能上传。

排查原因： 1.ImageMagick 问题，已经安装，，，，

2.服务器前端用 nginx 代理，超时是默认的 60s，大小是 10M， 3.本地测试的时候能够成功，

请问，请高人指点，给解题思路！

已经成功上传，非常感谢 Qing Wang

部署后登录：提示 Web application could not be started

sensi — Wed, 14 May 2014 10:04:19 +0800

database.yml

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
development:
  adapter: mysql2
  database: date_around
  pool: 5
  timeout: 5000
  username: root
  encoding: utf8
  host: localhost
  # password: 

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: mysql2
  database: date_around
  pool: 5
  timeout: 5000
  username: root
  encoding: utf8
  host: localhost
  password: 

production:
  adapter: mysql2
  database: date_around
  pool: 5
  timeout: 5000
  username: root
  encoding: utf8
  host: localhost
  password:

数据库配置如上，

错误信息如下

database configuration does not specify adapter (ActiveRecord::AdapterNotSpecified)
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/connection_specification.rb:52:in `resolve_hash_connection'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/connection_specification.rb:46:in `resolve_string_connection'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/connection_specification.rb:30:in `spec'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_handling.rb:39:in `establish_connection'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/railtie.rb:176:in `block (2 levels) in <class:Railtie>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/lazy_load_hooks.rb:44:in `each'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/base.rb:322:in `<module:ActiveRecord>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/base.rb:22:in `<top (required)>'
  /home/root/www/sample_app/app/models/user.rb:1:in `<top (required)>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:229:in `require'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:229:in `block in require'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:214:in `load_dependency'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:229:in `require'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:330:in `require_or_load'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:289:in `depend_on'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/activesupport-4.0.3/lib/active_support/dependencies.rb:207:in `require_dependency'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/engine.rb:464:in `each'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/engine.rb:464:in `block in eager_load!'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/engine.rb:462:in `each'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/engine.rb:462:in `eager_load!'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/engine.rb:347:in `eager_load!'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/application/finisher.rb:56:in `each'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/initializable.rb:30:in `instance_exec'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/initializable.rb:30:in `run'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/initializable.rb:55:in `block in run_initializers'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:180:in `each'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
  /usr/local/rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/initializable.rb:54:in `run_initializers'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/application.rb:215:in `initialize!'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/railties-4.0.3/lib/rails/railtie/configurable.rb:30:in `method_missing'
  /home/root/www/sample_app/config/environment.rb:5:in `<top (required)>'
  config.ru:3:in `require'
  config.ru:3:in `block in <main>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
  config.ru:1:in `new'
  config.ru:1:in `<main>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/passenger-4.0.39/helper-scripts/rack-preloader.rb:112:in `eval'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/passenger-4.0.39/helper-scripts/rack-preloader.rb:112:in `preload_app'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/passenger-4.0.39/helper-scripts/rack-preloader.rb:158:in `<module:App>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/passenger-4.0.39/helper-scripts/rack-preloader.rb:29:in `<module:PhusionPassenger>'
  /usr/local/rvm/gems/ruby-2.0.0-p451/gems/passenger-4.0.39/helper-scripts/rack-preloader.rb:28:in `<main>'

上面说数据库不适配，我的 database.yml 设置跟另一个运行正常的的文件模板一样的，我想不是 database.yml 的原因。。

————————————————————————————

还有一个重要的信息：：：项目启动了之后，数据库中没有生成对应的数据库！

运行一个叫做 rain 的项目能够正常运转，换成别的项目就不行了，（nginx.conf 已经修改），已经尝试多个项目，都无法正常运行，，

弱弱的问一句 show databases 后只有 information_schema 是怎么回事？？

sensi — Fri, 25 Apr 2014 21:01:33 +0800

之前电脑上又 MySQL5.5 一直用 Navicat 那玩意管理数据库如今

在命令行里管理数据库的时候，很多数据库不显示但是在 Navicat 那里都显示的好好的，，并且都正常使用，，这个怎么破？？？？？

bundle exec rake db:reset 出现了奇怪的错误

sensi — Thu, 24 Apr 2014 20:29:40 +0800

Unknown database 'sample_app'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/mysql2-0.3.15/lib/mysql2/client.rb:67:in `connect'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/mysql2-0.3.15/lib/mysql2/client.rb:67:in `initialize'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb:18:in `new'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb:18:in `mysql2_connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:440:in `new_connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:450:in `checkout_new_connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:421:in `acquire_connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:356:in `block in checkout'
/Users/ranran/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `checkout'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
/Users/ranran/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_handling.rb:79:in `retrieve_connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/connection_handling.rb:53:in `connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/mysql_database_tasks.rb:8:in `connection'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/mysql_database_tasks.rb:41:in `drop'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/database_tasks.rb:98:in `drop'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/database_tasks.rb:110:in `block in drop_current'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/database_tasks.rb:183:in `block in each_current_configuration'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/database_tasks.rb:182:in `each'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/database_tasks.rb:182:in `each_current_configuration'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/tasks/database_tasks.rb:109:in `drop_current'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/railties/databases.rake:35:in `block (2 levels) in <top (required)>'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:236:in `call'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:231:in `each'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
/Users/ranran/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/activerecord-4.0.3/lib/active_record/railties/databases.rake:139:in `block (2 levels) in <top (required)>'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:236:in `call'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:231:in `each'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
/Users/ranran/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:149:in `invoke_task'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:106:in `each'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:106:in `block in top_level'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:115:in `run_with_threads'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:100:in `top_level'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:78:in `block in run'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:165:in `standard_exception_handling'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/lib/rake/application.rb:75:in `run'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/gems/rake-10.1.1/bin/rake:33:in `<top (required)>'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/bin/rake:23:in `load'
/Users/ranran/.rvm/gems/ruby-2.0.0-p451/bin/rake:23:in `<main>'
Couldn't drop sample_app
sample_app already exists
-- create_table("users", {:force=>true})
   -> 0.0607s
-- add_index("users", ["email"], {:name=>"index_users_on_email", :unique=>true, :using=>:btree})
   -> 0.1683s
-- add_index("users", ["remember_token"], {:name=>"index_users_on_remember_token", :using=>:btree})
   -> 0.1204s
-- initialize_schema_migrations_table()
   -> 0.2223s

Couldn't drop sample_app sample_app already exists

这个什么情况

病马寻良医，SessionHelper 错误！

sensi — Sun, 13 Apr 2014 20:23:18 +0800

报错：


Failures:

  1) AuthenticationPages GET /authentication_pages should hava the title 'sign in'
     Failure/Error: visit signin_path
     ActionController::RoutingError:
       uninitialized constant ApplicationController::SeesionsHelper
     # ./app/controllers/application_controller.rb:6:in `<class:ApplicationController>'
     # ./app/controllers/application_controller.rb:1:in `<top (required)>'
     # ./app/controllers/sessions_controller.rb:1:in `<top (required)>'
     # ./spec/requests/authentication_pages_spec.rb:15:in `block (3 levels) in <top (required)>'

  2) AuthenticationPages signin with valid information 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf089210>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

  3) AuthenticationPages signin with valid information 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf4308f0>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

  4) AuthenticationPages signin with valid information 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf643e58>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

  5) AuthenticationPages signin with valid information 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf791a80>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

  6) AuthenticationPages signin with valid information with invalid information 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf0a8638>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

  7) AuthenticationPages signin with valid information with invalid information 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf438ca8>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

  8) AuthenticationPages signin with valid information with invalid information after visiting another page 
     Failure/Error: click_button "Sign in"
     NoMethodError:
       undefined method `sign_in' for #<SessionsController:0x007f9dbf6496a0>
     # ./app/controllers/sessions_controller.rb:9:in `create'
     # (eval):2:in `click_button'
     # ./spec/requests/authentication_pages_spec.rb:40:in `block (4 levels) in <top (required)>'

Finished in 1.05 seconds
42 examples, 8 failures

Failed examples:

rspec ./spec/requests/authentication_pages_spec.rb:14 # AuthenticationPages GET /authentication_pages should hava the title 'sign in'
rspec ./spec/requests/authentication_pages_spec.rb:44 # AuthenticationPages signin with valid information 
rspec ./spec/requests/authentication_pages_spec.rb:45 # AuthenticationPages signin with valid information 
rspec ./spec/requests/authentication_pages_spec.rb:43 # AuthenticationPages signin with valid information 
rspec ./spec/requests/authentication_pages_spec.rb:46 # AuthenticationPages signin with valid information 
rspec ./spec/requests/authentication_pages_spec.rb:28 # AuthenticationPages signin with valid information with invalid information 
rspec ./spec/requests/authentication_pages_spec.rb:29 # AuthenticationPages signin with valid information with invalid information 
rspec ./spec/requests/authentication_pages_spec.rb:32 # AuthenticationPages signin with valid information with invalid information after visiting another page 


----------------
application_controller.rb文件



```shell
class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  # protect_from_forgery with: :exception
  protect_from_forgery 
  include SessionsHelper

end

sessions_helper.rb 文件

module SessionsHelper
    def sign_in(user)
        cookies.permanent[:remember_token] = user.remember_token
        self.current_user = user 
    end

    def signed_in? 
        !current_user.nil?
    end

    def current_user=(user) 
        @current_user = user
    end
    def current_user
        @current_user ||= User.find_by_remember_token(cookies[:remember_token])
    end
end

部署 ubuntu 服务器过程中 git clone 不成功

sensi — Tue, 18 Mar 2014 09:35:27 +0800

并且我已经获得了用户权限： sudo su 然后是密码然后按照部署上说的是：git clone git@you.host:gitlab.git 我在我的 mac 上 git clone git@/User/ranran/rain:rain.git 然后无法克隆成功

请问是 you.host 我理解的有误还是？？？我是在本地的机器上运行操作 git 的

++++++++++++++++++++++++++++++++++++++++

我现在不在电脑旁，没法测试请问部署上说的 git 操作是不是都是在服务器上运行的？？

意思是 git clone git@ip 地址：文件地址.git 吗？？？？？？？？？？

请问做好项目之后怎么部署到七牛？？？

sensi — Sun, 16 Mar 2014 17:50:07 +0800

七牛的部署我实在是看不懂啊！怎么部署！！！

官网上得文档我越看越迷瞪了！

sandbox 下 user.save 能够保存但是数据库中不显示好奇妙的问题

sensi — Sun, 09 Mar 2014 21:07:36 +0800

1 . rails console --sandbox 进入控制台 2. 建立了一个心的用户，并 save 到数据库 user.id 查询数据库成功是 id => 1

但是问题来了--------- 进去 MySQL 并没有看到数据库更新 ..

然后我就直接进入 rails console 并没进去安全模式同样的操作保存看到数据库显示更新了一条信息并且 id => 2

问题是 id => 1 的那条数据哪里去了？？？？？？？为什么 mysql 不显示
我用的是 navicate 管理工具

mac 上每次打开终端，都需要重新载入 rvm ，怎么设置自动载入

sensi — Thu, 06 Mar 2014 20:23:21 +0800

如题

每次打开终端，输入 rvm -v 都显示 command not found ..

必须手动载入，，

$ source ~/.rvm/scripts/rvm

请问怎么让它自动载入，否则这样很麻烦的，

安装 debugger 的时候出现了下面的错误结果看不懂新手求解

sensi — Wed, 26 Feb 2014 21:43:20 +0800

ranrandeMac-mini:blog ranran$ bundle install Fetching gem metadata from https://rubygems.org/........... Fetching additional metadata from https://rubygems.org/.. Resolving dependencies... Using rake (10.1.1) Using i18n (0.6.9) Using minitest (4.7.5) Using multi_json (1.8.4) Using atomic (1.1.14) Using thread_safe (0.1.3) Using tzinfo (0.3.38) Using activesupport (4.0.3) Using builder (3.1.4) Using erubis (2.7.0) Using rack (1.5.2) Using rack-test (0.6.2) Using actionpack (4.0.3) Using mime-types (1.25.1) Using polyglot (0.3.4) Using treetop (1.4.15) Using mail (2.5.4) Using actionmailer (4.0.3) Using activemodel (4.0.3) Using activerecord-deprecated_finders (1.0.3) Using arel (4.0.2) Using activerecord (4.0.3) Using bundler (1.5.3) Using coffee-script-source (1.7.0) Using execjs (2.0.2) Using coffee-script (2.2.0) Using thor (0.18.1) Using railties (4.0.3) Using coffee-rails (4.0.1) Using columnize (0.3.6) Using debugger-linecache (1.2.0) Using debugger-ruby_core_source (1.3.2)

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb checking for rb_method_entry_t.called_id in method.h... no checking for rb_control_frame_t.method_id in method.h... no checking for rb_method_entry_t.called_id in method.h... no checking for rb_control_frame_t.method_id in method.h... no checking for rb_method_entry_t.called_id in method.h... yes checking for vm_core.h... yes checking for iseq.h... no Makefile creation failed

NOTE: If your headers were not found, try passing --with-ruby-include=PATH_TO_HEADERS

*** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby --with-ruby-dir --without-ruby-dir --with-ruby-include --without-ruby-include=${ruby-dir}/include --with-ruby-lib --without-ruby-lib=${ruby-dir}/

Gem files will remain installed in /Users/ranran/blog/vendor/bundle/ruby/2.0.0/gems/debugger-1.6.5 for inspection. Results logged to /Users/ranran/blog/vendor/bundle/ruby/2.0.0/gems/debugger-1.6.5/ext/ruby_debug/gem_make.out An error occurred while installing debugger (1.6.5), and Bundler cannot continue. Make sure that gem install debugger -v '1.6.5' succeeds before bundling. ranrandeMac-mini:blog ranran$ gem install debugger -v '1.6.5' ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.

irb 中输入刚用脚手架创建的 post 资源，出现下面的错误!! 弟弟等哥哥们的答案！！！！

sensi — Sun, 23 Feb 2014 21:46:57 +0800

建立 post 资源后，数据库已经 migrate，并在 post.rb 中对字段进行了验证，跟着教程做了个下面的尝试，（以上操作步骤均正确） ranrandeMac-mini:blog ranran$ rails console Loading development environment (Rails 4.0.3) 进入 Irb 模式：：：：：：：：：：：：：：：：：：：

irb(main):001:0> post /////就是这个尝试出现了下面的错误

NameError: undefined local variable or method post' for main:Object from (irb):1 from /Users/ranran/blog/vendor/bundle/ruby/2.0.0/gems/railties-4.0.3/lib/rails/commands/console.rb:90:instart' from /Users/ranran/blog/vendor/bundle/ruby/2.0.0/gems/railties-4.0.3/lib/rails/commands/console.rb:9:in start' from /Users/ranran/blog/vendor/bundle/ruby/2.0.0/gems/railties-4.0.3/lib/rails/commands.rb:62:in' from bin/rails:4:in require' from bin/rails:4:in

' 求解答！！！！！！！！！！！！！！！！！！！！

不知道什么原因。先 Post.count 显示 (55.4ms) SELECT COUNT(*) FROM posts 然后 Post 居然成功了！