我在将新添加的列中的信息写入我的 mysql 数据库时遇到问题。特别是“site_email”。当我在本地运行项目时，我可以使用我的新列内容写入数据库，它会出现在随后的显示页面上。
但是在开发服务器上我不能。开发服务器日志显示请求中发送的内容。
Started PUT "/sites/18" for x.x.139.147 at 2012-12-03 19:47:39 +0000
Processing by SitesController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"6QXzdALrXqXoQz+Q5SFXd+egNQGxOAdNIC8ZH9A9yqU=", "site"=>{"customer_id"=>"1", "site_name"=>"Demohello", "site_domain"=>"Demo", "site_email"=>"test@email.comhello", "google_analytics_code"=>"", "visible"=>"1", "mobile_visible"=>"1", "logo_cache"=>"", "background_logo_cache"=>"", "header_cache"=>"", "background_cache"=>"", "campaign_wrapbar_cache"=>""}, "commit"=>"Update Site", "id"=>"18"}
Redirected to http://x.com/sites/18
Completed 302 Found in 17ms
但是当它进入显示页面时，新的/更新的电子邮件数据不存在。奇怪的是，如果我将任何数据添加到预先存在的列以及其他数据已成功发送到数据库但电子邮件不是。
索引显示和编辑页面都显示没有错误，如果我手动更改数据库中的信息，它会显示在显示页面上。在发送请求数据并且页面没有产生错误时，我什至无法调试它。
从 /var/www/sitename/current 我跑
bundle exec rake db:migrate
使用 SequelPro 连接到开发数据库我可以看到该列看起来在那里，并且实际上如果我在 site_email 列中插入一个值，数据就会出现在显示页面上。
D B
显示插入值的页面
_form.html.erb
<%= form_for(@site) do |f| %>
<% if @site.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@site.errors.count, "error") %> prohibited this site from being saved:</h2>
<ul>
<% @site.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :customer_id %><br />
<%#= f.text_field :customer %>
<%= f.collection_select(:customer_id, Customer.all , :id , :customer_name ) %>
</div>
<div class="field">
<%= f.label :site_name %><br />
<%= f.text_field :site_name %>
</div>
<div class="field">
<%= f.label :site_domain %><br />
<%= f.text_field :site_domain %>
</div>
<div class="field">
<%= f.label :site_email %><br />
<%= f.text_field :site_email %>
</div>
<div class="field">
<%= f.label :google_analytics_code %><br />
<%= f.text_field :google_analytics_code %>
</div>
<div class="field">
<%= f.label :visible %><br />
<%= f.check_box :visible %><br />
</div>
<div class="field">
<%= f.label :mobile_visible %><br />
<%= f.check_box :mobile_visible %><br />
</div>
<div class="field">
<%= f.label :logo %>
<%= f.file_field :logo %>
<%= f.hidden_field :logo_cache %><br />
<%= image_tag(@site.logo_url) if @site.logo? %>
</div>
<div class="field">
<%= f.label :background_logo %>
<%= f.file_field :background_logo %>
<%= f.hidden_field :background_logo_cache %><br />
<%= image_tag(@site.background_logo_url) if @site.background_logo? %>
</div>
<div class="field">
<%= f.label :header %>
<%= f.file_field :header %>
<%= f.hidden_field :header_cache %><br />
<%= image_tag(@site.header_url) if @site.header? %>
</div>
<div class="field">
<%= f.label :background %>
<%= f.file_field :background %>
<%= f.hidden_field :background_cache %><br />
<%= image_tag(@site.background_url) if @site.background? %>
</div>
<div class="field">
<%= f.label :campaign_wrapbar %>
<%= f.file_field :campaign_wrapbar %>
<%= f.hidden_field :campaign_wrapbar_cache %><br />
<%= image_tag(@site.campaign_wrapbar_url) if @site.campaign_wrapbar? %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
显示.html.erb
<section id="otherpage">
<div class="otherpagetitle"> <%= @site.site_name %></div>
<div class="otherpagetext dark_border_24_no_pad">
<p>
<b>Site name:</b>
<%= @site.site_name %>
</p>
<p>
<b>Site customer:</b>
<%= @site.customer %>
</p>
<p>
<b>Site domain:</b>
<%= @site.site_domain %>
</p>
<p>
<b>Site email:</b>
<%= @site.site_email %>
</p>
<p>
<b>Google analytics code:</b>
<%= @site.google_analytics_code %>
</p>
<div class="field">
<p>
<b>Visible: </b>
<%= check_box_tag "Visible", "yes", @site.visible, disabled: true %>
</p>
</div>
<div class="field">
<p>
<b>Mobile Visible: </b>
<%= check_box_tag "Mobile Visible", "yes", @site.mobile_visible, disabled: true %>
</p>
</div>
<div class="field">
<p>
<b>Logo: </b><br />
<%= @site.logo? ? image_tag(@site.logo_url) : "No logo uploaded" %>
</p>
</div>
<div class="field">
<p>
<b>Background Logo: </b><br />
<%= @site.background_logo? ? image_tag(@site.background_logo_url) : "No background logo uploaded" %>
</p>
</div>
<%= link_to 'Edit', edit_site_path(@site) %> |
<%= link_to 'Back', sites_path %>
</div>
</section>
编辑.html.erb
<section id="otherpage">
<div class="otherpagetitle">Editing Site</div>
<div class="otherpagetext dark_border_24_no_pad">
<%= render 'form' %>
<%= link_to 'Show', @site %> |
<%= link_to 'Back', sites_path %>
</div>
</section>
站点控制器.rb
class SitesController < ApplicationController
load_and_authorize_resource
# GET /sites
# GET /sites.json
def index
@sites = Site.all
@site = Site.first(conditions: { site_domain: request.subdomain }) || not_found
respond_to do |format|
format.html # index.html.erb
format.json { render json: @sites }
end
end
# GET /sites/1
# GET /sites/1.json
def show
@site = Site.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: @site }
end
end
# GET /sites/new
# GET /sites/new.json
def new
@site = Site.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: @site }
end
end
# GET /sites/1/edit
def edit
@site = Site.find(params[:id])
end
# POST /sites
# POST /sites.json
def create
@site = Site.new(params[:site])
respond_to do |format|
if @site.save
format.html { redirect_to @site, notice: 'Site was successfully created.' }
format.json { render json: @site, status: :created, location: @site }
else
format.html { render action: "new" }
format.json { render json: @site.errors, status: :unprocessable_entity }
end
end
end
# PUT /sites/1
# PUT /sites/1.json
def update
@site = Site.find(params[:id])
respond_to do |format|
if @site.update_attributes(params[:site])
format.html { redirect_to @site, notice: 'Site was successfully updated.' }
format.json { head :ok }
else
format.html { render action: "edit" }
format.json { render json: @site.errors, status: :unprocessable_entity }
end
end
end
# DELETE /sites/1
# DELETE /sites/1.json
def destroy
@site = Site.find(params[:id])
@site.destroy
respond_to do |format|
format.html { redirect_to sites_url }
format.json { head :ok }
end
end
def site_styles
@site = Site.first(conditions: { site_domain: request.subdomain }) || not_found
respond_to do |format|
format.html
format.json { render json: @site }
format.css
end
end
end
Gemlock.文件
GEM
remote: http://rubygems.org/
specs:
actionmailer (3.1.5)
actionpack (= 3.1.5)
mail (~> 2.3.3)
actionpack (3.1.5)
activemodel (= 3.1.5)
activesupport (= 3.1.5)
builder (~> 3.0.0)
erubis (~> 2.7.0)
i18n (~> 0.6)
rack (~> 1.3.6)
rack-cache (~> 1.2)
rack-mount (~> 0.8.2)
rack-test (~> 0.6.1)
sprockets (~> 2.0.4)
activemodel (3.1.5)
activesupport (= 3.1.5)
builder (~> 3.0.0)
i18n (~> 0.6)
activerecord (3.1.5)
activemodel (= 3.1.5)
activesupport (= 3.1.5)
arel (~> 2.2.3)
tzinfo (~> 0.3.29)
activeresource (3.1.5)
activemodel (= 3.1.5)
activesupport (= 3.1.5)
activesupport (3.1.5)
multi_json (>= 1.0, < 1.3)
ansi (1.4.2)
arel (2.2.3)
bcrypt-ruby (3.0.1)
best_in_place (1.0.6)
jquery-rails
rails (~> 3.1)
builder (3.0.0)
cancan (1.6.7)
capistrano (2.11.2)
highline
net-scp (>= 1.0.0)
net-sftp (>= 2.0.0)
net-ssh (>= 2.0.14)
net-ssh-gateway (>= 1.1.0)
capistrano-ext (1.2.1)
capistrano (>= 1.0.0)
carrierwave (0.5.8)
activesupport (~> 3.0)
ckeditor (3.7.0.rc2)
mime-types (~> 1.17.2)
orm_adapter (~> 0.0.6)
coffee-rails (3.1.1)
coffee-script (>= 2.2.0)
railties (~> 3.1.0)
coffee-script (2.2.0)
coffee-script-source
execjs
coffee-script-source (1.2.0)
daemons (1.1.8)
devise (1.5.3)
bcrypt-ruby (~> 3.0)
orm_adapter (~> 0.0.3)
warden (~> 1.1)
erubis (2.7.0)
eventmachine (0.12.10)
execjs (1.2.13)
multi_json (~> 1.0)
friendly_id (4.0.1)
has_scope (0.5.1)
highline (1.6.11)
hike (1.2.1)
i18n (0.6.0)
inherited_resources (1.2.2)
has_scope (~> 0.5.0)
responders (~> 0.6.0)
jquery-rails (1.0.19)
railties (~> 3.0)
thor (~> 0.14)
json (1.7.3)
mail (2.3.3)
i18n (>= 0.4.0)
mime-types (~> 1.16)
treetop (~> 1.4.8)
mime-types (1.17.2)
mini_magick (3.4)
subexec (~> 0.2.1)
minitest (2.6.1)
multi_json (1.2.0)
mysql2 (0.3.11)
net-scp (1.0.4)
net-ssh (>= 1.99.1)
net-sftp (2.0.5)
net-ssh (>= 2.0.9)
net-ssh (2.3.0)
net-ssh-gateway (1.1.0)
net-ssh (>= 1.99.1)
orm_adapter (0.0.6)
polyglot (0.3.3)
rack (1.3.6)
rack-cache (1.2)
rack (>= 0.4)
rack-mount (0.8.3)
rack (>= 1.0.0)
rack-ssl (1.3.2)
rack
rack-test (0.6.1)
rack (>= 1.0)
rails (3.1.5)
actionmailer (= 3.1.5)
actionpack (= 3.1.5)
activerecord (= 3.1.5)
activeresource (= 3.1.5)
activesupport (= 3.1.5)
bundler (~> 1.0)
railties (= 3.1.5)
rails-i18n (0.3.0)
i18n (~> 0.5)
railties (3.1.5)
actionpack (= 3.1.5)
activesupport (= 3.1.5)
rack-ssl (~> 1.3.2)
rake (>= 0.8.7)
rdoc (~> 3.4)
thor (~> 0.14.6)
rake (0.9.2.2)
rdoc (3.12)
json (~> 1.4)
responders (0.6.5)
sass (3.1.15)
sass-rails (3.1.4)
actionpack (~> 3.1.0)
railties (~> 3.1.0)
sass (>= 3.1.4)
sprockets (~> 2.0.0)
tilt (~> 1.3.2)
sprockets (2.0.4)
hike (~> 1.2)
rack (~> 1.0)
tilt (~> 1.1, != 1.3.0)
sqlite3 (1.3.5)
subexec (0.2.1)
thin (1.3.1)
daemons (>= 1.0.9)
eventmachine (>= 0.12.6)
rack (>= 1.0.0)
thor (0.14.6)
tilt (1.3.3)
treetop (1.4.10)
polyglot
polyglot (>= 0.3.1)
truncate_html (0.5.4)
turn (0.8.3)
ansi
tzinfo (0.3.33)
uglifier (1.2.3)
execjs (>= 0.3.0)
multi_json (>= 1.0.2)
warden (1.1.0)
rack (>= 1.0)
will_paginate (3.0.3)
PLATFORMS
ruby
DEPENDENCIES
best_in_place
cancan
capistrano-ext
carrierwave
ckeditor (= 3.7.0.rc2)
coffee-rails (~> 3.1.1)
devise (~> 1.5)
execjs (~> 1.2.11)
friendly_id
inherited_resources
jquery-rails
mini_magick
minitest
mysql2 (~> 0.3.11)
rails (~> 3.1.4)
rails-i18n
sass-rails (= 3.1.4)
sqlite3
thin
truncate_html
turn
uglifier (>= 1.0.3)
will_paginate (~> 3.0)
移民
class AddSiteEmailColumnToSites < ActiveRecord::Migration
def change
add_column :sites, :site_email, :string
end
end
capistrano 部署
cap staging deploy
triggering load callbacks
* 2012-12-03 20:45:57 executing `staging'
triggering start callbacks for `deploy'
* 2012-12-03 20:45:57 executing `multistage:ensure'
Identity added: /Users/me/.ssh/id_rsa (/Users/me/.ssh/id_rsa)
* 2012-12-03 20:45:57 executing `deploy'
* 2012-12-03 20:45:57 executing `deploy:update'
** transaction: start
* 2012-12-03 20:45:57 executing `deploy:update_code'
executing locally: "git ls-remote ssh://gitolite@site_repo:2011/proto_mysitename_rails HEAD"
command finished in 2997ms
* executing "git clone -q ssh://gitolite@site_repo:2011/proto_mysitename_rails /var/www/sitename/releases/20121203204600 && cd /var/www/sitename/releases/20121203204600 && git checkout -q -b deploy ed9ca3a2f10b049ed17b952d90ec7b61e9e98822 && (echo ed9ca3a2f10b049ed17b952d90ec7b61e9e98822 > /var/www/sitename/releases/20121203204600/REVISION)"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 80618ms
* 2012-12-03 20:47:21 executing `deploy:finalize_update'
triggering before callbacks for `deploy:finalize_update'
* 2012-12-03 20:47:21 executing `deploy:assets:symlink'
* executing "rm -rf /var/www/sitename/releases/20121203204600/public/assets &&\\\n mkdir -p /var/www/sitename/releases/20121203204600/public &&\\\n mkdir -p /var/www/sitename/shared/assets &&\\\n ln -s /var/www/sitename/shared/assets /var/www/sitename/releases/20121203204600/public/assets"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 118ms
* executing "chmod -R -- g+w /var/www/sitename/releases/20121203204600 && rm -rf -- /var/www/sitename/releases/20121203204600/public/system && mkdir -p -- /var/www/sitename/releases/20121203204600/public/ && ln -s -- /var/www/sitename/shared/system /var/www/sitename/releases/20121203204600/public/system && rm -rf -- /var/www/sitename/releases/20121203204600/log && ln -s -- /var/www/sitename/shared/log /var/www/sitename/releases/20121203204600/log && rm -rf -- /var/www/sitename/releases/20121203204600/tmp/pids && mkdir -p -- /var/www/sitename/releases/20121203204600/tmp/ && ln -s -- /var/www/sitename/shared/pids /var/www/sitename/releases/20121203204600/tmp/pids"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 120ms
triggering after callbacks for `deploy:update_code'
* 2012-12-03 20:47:21 executing `deploy:assets:precompile'
* executing "cd /var/www/sitename/releases/20121203204600 && rake RAILS_ENV=production RAILS_GROUPS=assets assets:precompile"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
** [out :: x.x.x.x] /usr/local/bin/ruby /usr/local/bin/rake assets:precompile:nondigest RAILS_ENV=production RAILS_GROUPS=assets
command finished in 101748ms
* 2012-12-03 20:49:03 executing `deploy:create_symlink'
* executing "rm -f /var/www/sitename/current && ln -s /var/www/sitename/releases/20121203204600 /var/www/sitename/current"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 111ms
** transaction: commit
* 2012-12-03 20:49:03 executing `deploy:restart'
* executing "rm /var/www/sitename/current/config/database.yml"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 65ms
* executing "ln -s /var/www/sitename/shared/database.yml /var/www/sitename/current/config/database.yml"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 65ms
* executing "ln -s /var/www/sitename/shared/session_store.rb /var/www/sitename/current/config/initializers/session_store.rb"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 69ms
* executing "ln -s /var/www/sitename/shared/public/uploads /var/www/sitename/current/public/uploads"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 63ms
* executing "ln -s /var/www/sitename/shared/public/ckeditor_assets /var/www/sitename/current/public/ckeditor_assets"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
command finished in 62ms
* executing "sudo -p 'sudo password: ' touch /var/www/sitename/current/tmp/restart.txt"
servers: ["x.x.x.x"]
[x.x.x.x] executing command
非常欢迎有关此问题的任何帮助或建议。
谢谢
更新
在不改变任何东西的情况下，值现在写入数据库。24岁左右。我现在对实时服务器有同样的问题。我又等了 24 小时，看看这是否解决了问题，或者我是否不小心以其他方式修复了它。
以防万一其他人将来遇到这个问题，有没有人知道它为什么会这样？
更新 2
实时服务器现在也在更新这些值。似乎服务器可能负载过重，或者数据库正在以某种方式运行。
参考
作为参考，如果您尝试尝试评论中的所有建议并查看 Thomas 的回答，这应该可以解决 99.9% 的问题。如果它在本地工作但不在服务器上，并且您已经尝试了所有这些步骤，那么它很可能与我遇到的问题相同，不幸的是我目前对此没有真正的答案。