danielfeng (Danielfeng)

Rails 简单搜索求教

danielfeng — Mon, 04 Jan 2016 21:56:41 +0800

需求：想实现通过 view 传递搜索关键字到 controller，进行变量 select，最终改变变量反馈到 view。各位大神有啥好方法。

在 view 中加入以下代码 ruby <%= form_tag("/search", method: :get) do %> <%= text_field_tag :search, params[:search], class: 'form-control search', placeholder: "search..." %> <% end %>
在 controller 中下了如下代码 ruby def search @cm = @cma.select { |k,j| k =~/#{params[:search]}/ } render "index" end def index @cma = list.select {|k,j| k =~/cm/ } ....... end
但执行搜索时候报错 undefined method `each' for nil:NilClass

Ruby 数组值修改

danielfeng — Sat, 22 Aug 2015 21:03:08 +0800

求教各位大侠，将以下数组修改成如下，ruby 应该怎么写？感谢。

[["v", 10480], ["dd", 10350], ["aa", 10250]]

修改如下

[["v", 104], ["dd", 103], ["aa", 102]]

能否跳过 rails socket Connection refused 而导致整个程序停止运行？

danielfeng — Wed, 27 May 2015 17:51:09 +0800

菜鸟请教换一个问题，写了个简单 rails 程序回去连接端口获得到数据，目前出现换一台关闭后 rails 就出现如下报错，是否 rails 可以忽略 socket 连接不上？ Connection refused - connect(2) for 192.168.1.9:2375 (Errno::ECONNREFUSED)

求教多重 hash 如何取值

danielfeng — Sat, 11 Apr 2015 21:23:07 +0800

求教如何在如下数据中取 PublicPort 或 Image

[#<Docker::Container:0x00000005195578 @id="8aba2f87cdf5e5d340f30fef8e5df8f58d990eab1c70583d4fef3a8fa83de3f2", @info={"Command"=>"/bin/bash", "Created"=>1427722904, "Image"=>"ddddd:latest", "Names"=>["/clever_pike"], "Ports"=>[{"IP"=>"0.0.0.0", "PrivatePort"=>80, "PublicPort"=>10280, "Type"=>"tcp"}], "Status"=>"Up 10 days", "id"=>"8aba2f87cdf5e5d340f30fef8e5df8f58d990eab1c70583d4fef3a8fa83de3f2"}, @connection=#<Docker::Connection:0x00000004aaadf8 @url="unix:///", @options={:socket=>"/var/run/docker.sock"}>>, #<Docker::Container:0x00000005195488 @id="c95642d254f1b716debbc8f5381b1234aff69c92db87a43e9b6f64216d1471b3", @info={"Command"=>"/bin/bash", "Created"=>1427722902, "Image"=>"bbbbbbb:latest", "Names"=>["/serene_heisenberg"], "Ports"=>[{"IP"=>"0.0.0.0", "PrivatePort"=>80, "PublicPort"=>10180, "Type"=>"tcp"}], "Status"=>"Up 10 days", "id"=>"c95642d254f1b716debbc8f5381b1234aff69c92db87a43e9b6f64216d1471b3"}, @connection=#<Docker::Connection:0x00000004aaadf8 @url="unix:///", @options={:socket=>"/var/run/docker.sock"}>>]

以上直接调用 docker-api，d=Docker::Container.all 获得，相应源代码如下。

def self.all(opts = {}, conn = Docker.connection)
    hashes = Docker::Util.parse_json(conn.get('/containers/json', opts)) || []
    hashes.map { |hash| new(conn, hash) }
end

通过 pp 结果输出如下

[#<Docker::Container:0x007fe34c722018
 @connection=
  #<Docker::Connection:0x007fe34d353af8
   @options={:socket=>"/var/run/docker.sock"},
   @url="unix:///">,
 @id="c95642d254f1b716debbc8f5381b1234aff69c92db87a43e9b6f64216d1471b3",
 @info=
  {"Command"=>"/bin/bash",
   "Created"=>1427722902,
   "Image"=>"dddd:latest",
   "Names"=>["/serene_heisenberg"],
   "Ports"=>
    [{"IP"=>"0.0.0.0",
      "PrivatePort"=>80,
      "PublicPort"=>10180,
      "Type"=>"tcp"}],
   "Status"=>"Up 12 days",
   "id"=>"c95642d254f1b716debbc8f5381b1234aff69c92db87a43e9b6f64216d1471b3"}>,
#<Docker::Container:0x007fe34c721f28
 @connection=
  #<Docker::Connection:0x007fe34d353af8
   @options={:socket=>"/var/run/docker.sock"},
   @url="unix:///">,
 @id="5583df725fa5917eee6609210fee422d6d1d0059f8a9c630bdbf407d6cd014fc",
 @info=
  {"Command"=>"/bin/bash",
   "Created"=>1427722900,
   "Image"=>"vvvvv:latest",
   "Names"=>["/adoring_franklin"],
   "Ports"=>
    [{"IP"=>"0.0.0.0",
      "PrivatePort"=>80,
      "PublicPort"=>10080,
      "Type"=>"tcp"}],
   "Status"=>"Up 12 days",
   "id"=>"5583df725fa5917eee6609210fee422d6d1d0059f8a9c630bdbf407d6cd014fc"}>]

ruby 读取配置文件 (更新方法)

danielfeng — Tue, 28 May 2013 09:37:13 +0800

求教 ruby 去读取一个配置文件，如读取 mysql 帐号密码，有啥简单方法，直接 file？目前用 parseconfig 解决，方法如下

#!/usr/bin/env ruby

require "rubygems"
require "parseconfig.rb"

config=ParseConfig.new('./datasources.cf')
puts config['cm_logs_db']['Port']

关于密码找回

danielfeng — Thu, 22 Nov 2012 10:11:05 +0800

不知密码找回是否存在问题，前面把密码忘了，测试了两次密码找回都没收到重置密码的邮件。不过刚又记起密码。发个贴问问。 @lgn21st