Paperclip基本配置，图片的content

ruby

has_attached_file :avatar,
    :styles => { :medium => "200x200>", :thumb => "100x100>" }

validates_attachment_content_type :avatar,
    :content_type => ['image/jpg', 'image/jpeg', 'image/pjpeg', 'image/gif', 'image/png', 'image/x-png'],
    :message => "only image files are allowed"

validates_attachment_size :avatar,
    :less_than => 1.megabyte, #another option is :greater_than
    :message => "max size is 1M"

2009-01-08T13:02:16+08:00

83 Paperclip基本配置，图片的content_type是比较全了

2009-01-08T13:02:16+08:00

ruby

class <<ActiveRecord::Base
  alias_method :[], :find
end

Person[5]
Person[:last]
Person[:all, :conditions => { :name => "Jamis" }]

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">class <<ActiveRecord::Base<tt> </tt> alias_method :[], :find<tt> </tt>end<tt> </tt><tt> </tt>Person[5]<tt> </tt>Person[:last]<tt> </tt>Person[:all, :conditions => { :name => "Jamis" }]<tt> </tt></pre></td> </tr></table>

2009-01-08T12:33:41+08:00

82 Alias for find

2009-01-08T12:34:07+08:00

ruby

function readablizeBytes(bytes) {
    var s = ['bytes', 'kb', 'MB', 'GB', 'TB', 'PB'];
    var e = Math.floor(Math.log(bytes)/Math.log(1024));
    return (bytes/Math.pow(1024, Math.floor(e))).toFixed(2)+" "+s[e];
}

readablizeBytes(5000); // 4.88 kb

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">function readablizeBytes(bytes) {<tt> </tt> var s = ['bytes', 'kb', 'MB', 'GB', 'TB', 'PB'];<tt> </tt> var e = Math.floor(Math.log(bytes)/Math.log(1024));<tt> </tt> return (bytes/Math.pow(1024, Math.floor(e))).toFixed(2)+" "+s[e];<tt> </tt>}<tt> </tt><tt> </tt>readablizeBytes(5000); // 4.88 kb<tt> </tt></pre></td> </tr></table>

2009-01-07T12:33:19+08:00

81 Convert Filesize Bytes to Readable String in Javascript

2009-01-07T12:33:19+08:00

ruby

ActionView::Base.new(Rails::Configuration.new.view_path).render(
    :partial => "shared/someview",
    :locals => {:somevar => somevar}
)

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">ActionView::Base.new(Rails::Configuration.new.view_path).render(<tt> </tt> :partial => "shared/someview",<tt> </tt> :locals => {:somevar => somevar}<tt> </tt>)</pre></td> </tr></table>

2008-12-31T10:03:55+08:00

80 Render in model

2008-12-31T10:03:55+08:00

rhtml

<script type="text/javascript" charset="utf-8">
Event.observe(window, 'load',
function() {
	alert('上传成功');
	parent.upload_call_back('<%= @photo.photo.url -%>');
	close_parent_wedgit_window();
}
);
</script>

2008-12-23T14:31:38+08:00

79 注册window onload事件

2008-12-23T14:31:38+08:00

ruby

class LineItem < ActiveRecord::Base
  class << self
    def find(*args)
      self.with_scope(:find => {:order => 'added_at'}) { super }
    end
  end
end

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">class LineItem < ActiveRecord::Base<tt> </tt> class << self<tt> </tt> def find(*args)<tt> </tt> self.with_scope(:find => {:order => 'added_at'}) { super }<tt> </tt> end<tt> </tt> end<tt> </tt>end</pre></td> </tr></table>

2008-12-17T08:07:53+08:00

78 重载model的find方法

2008-12-17T08:07:53+08:00

ruby

class String 
 def utf8?
    begin
      utf8_arr = self.unpack('U*')
      true if utf8_arr && utf8_arr.size > 0
    rescue
      false
    end
  end
end

'中文'.utf8？

2008-12-11T11:07:35+08:00

77 检查字符utf8编码

2008-12-11T11:31:22+08:00

ruby

d1 = Date.new( 2006, 12, 1 ) 

d2 = Date.new( 2007, 1, 15 )

weekdays = (d1..d2).reject { |d| [0,6].include? d.wday } 

weekdays.length

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">d1 = Date.new( 2006, 12, 1 ) <tt> </tt><tt> </tt>d2 = Date.new( 2007, 1, 15 )<tt> </tt><tt> </tt>weekdays = (d1..d2).reject { |d| [0,6].include? d.wday } <tt> </tt><tt> </tt>weekdays.length</pre></td> </tr></table>

2008-12-04T22:05:38+08:00

76 计算两个日期间有多少个工作日

2008-12-04T22:05:38+08:00

批量生成 named_scope. ruby

class User < ActiveRecord::Base
   STATES = [ 'pending', 'approved', 'denied' ]

   validates_inclusion_of :state, :in => STATES

   # Define a named scope for each state in STATES
   STATES.each { |s| named_scope s, :conditions => { :state => s } }
end

2008-12-03T15:50:35+08:00

75 add scope for each states

2008-12-03T15:50:35+08:00

ruby

class PaperJsView < ActionView::Base
  attr_accessor :questions, :scores
end

view = PaperJsView.new(Rails::Configuration.new.view_path)
view.questions = questions
view.scores = scores

s = view.render(:partial => "subjects/papers/paper.js.erb")

2008-11-25T14:29:34+08:00

74 Render in model or backgroundrb

2008-11-25T14:29:34+08:00

@conditions = [] @conditions << xx if xx :conditions => @conditions.join(" and ") ruby

@conditions = [] 
@con1 = params[:category] ? (@conditions << "company_categories.cat_name = '#{params[:category]}'") : nil 
@con2 = params[:alpha] ? (@conditions << "companies.name LIKE '#{params[:alpha]}%'") : nil 

# count the number of records returned with includes and conditions set 
@company_count = Company.count(:include => includes, :conditions => @conditions.join(" and ")) 

# Finally, our find 
@companies = Company.paginate :page => params[:page], :per_page => 10, :order => 'name', :include => includes, :conditions => @conditions.join(" and ")

2008-10-25T19:19:21+08:00

73 合并 conditions

2008-10-25T19:19:47+08:00

ruby

require 'find'
require 'fileutils'

def dir_move( target,dirpath=Dir.pwd)
    ## check if path valid
    if !File.directory?(dirpath)  
        puts "error first path"
        return
    elsif File.file?(target)
        puts "error :target is a file exist"
        return
    end
    ###
    Dir.mkdir target unless File.exist? target
    Find.find dirpath do |path|
        path_lite=path.gsub(dirpath,'')
        target_path=(target+path_lite).gsub(/[^a-zA-Z0-9\.\-\+_\(\)\/]/,"_").gsub(/(__)+/,"zhongwen")
        begin
            if File.directory? path
                Dir.mkdir target_path
            else
                FileUtils.copy path,target_path
            end
        rescue
            # if type(path) != type(target_path)
            #            puts "waring: type unmatch, local=>#{path} is a #{type(path)},target=>#{target_path} is a #{type(target_path)}"
            #            end
        end
    end
    puts "everyting is ok"
end

def type(file)
    return unless File.exist? file
    if File.file? file
        "file"
    else
        "directory"
    end
end

dir_move("/Users/holin/bin2", "/Users/holin/bin")

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt>8<tt> </tt>9<tt> </tt>10<tt> </tt>11<tt> </tt>12<tt> </tt>13<tt> </tt>14<tt> </tt>15<tt> </tt>16<tt> </tt>17<tt> </tt>18<tt> </tt>19<tt> </tt>20<tt> </tt>21<tt> </tt>22<tt> </tt>23<tt> </tt>24<tt> </tt>25<tt> </tt>26<tt> </tt>27<tt> </tt>28<tt> </tt>29<tt> </tt>30<tt> </tt>31<tt> </tt>32<tt> </tt>33<tt> </tt>34<tt> </tt>35<tt> </tt>36<tt> </tt>37<tt> </tt>38<tt> </tt>39<tt> </tt>40<tt> </tt>41<tt> </tt>42<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">require 'find'<tt> </tt>require 'fileutils'<tt> </tt><tt> </tt>def dir_move( target,dirpath=Dir.pwd)<tt> </tt> ## check if path valid<tt> </tt> if !File.directory?(dirpath) <tt> </tt> puts "error first path"<tt> </tt> return<tt> </tt> elsif File.file?(target)<tt> </tt> puts "error :target is a file exist"<tt> </tt> return<tt> </tt> end<tt> </tt> ###<tt> </tt> Dir.mkdir target unless File.exist? target<tt> </tt> Find.find dirpath do |path|<tt> </tt> path_lite=path.gsub(dirpath,'')<tt> </tt> target_path=(target+path_lite).gsub(/[^a-zA-Z0-9\.\-\+_\(\)\/]/,"_").gsub(/(__)+/,"zhongwen")<tt> </tt> begin<tt> </tt> if File.directory? path<tt> </tt> Dir.mkdir target_path<tt> </tt> else<tt> </tt> FileUtils.copy path,target_path<tt> </tt> end<tt> </tt> rescue<tt> </tt> # if type(path) != type(target_path)<tt> </tt> # puts "waring: type unmatch, local=>#{path} is a #{type(path)},target=>#{target_path} is a #{type(target_path)}"<tt> </tt> # end<tt> </tt> end<tt> </tt> end<tt> </tt> puts "everyting is ok"<tt> </tt>end<tt> </tt><tt> </tt>def type(file)<tt> </tt> return unless File.exist? file<tt> </tt> if File.file? file<tt> </tt> "file"<tt> </tt> else<tt> </tt> "directory"<tt> </tt> end<tt> </tt>end<tt> </tt><tt> </tt>dir_move("/Users/holin/bin2", "/Users/holin/bin")<tt> </tt></pre></td> </tr></table>

2008-10-15T16:54:14+08:00

72 复制文件并去除特殊字符文件名

2008-10-15T16:54:14+08:00

上课前临时写的，回来加强。 ruby

##
##  this is design for calculate the totals line of code in your project
##  version 1 @october 8th,2008 
##
 

module Enumerable
  # function to get total lines for file
  def total_lines
    lines = 0
    each_with_index {|content,lines|}
    return lines+1
  end
end


class CheckLines
  require 'find'


  @check_type = %w{txt rb erb yml html css xml}
  def initialize(directory)
    @total_lines = 0
    if  File.directory?(directory)
          @directory = directory 
          @contents = {}
          self.go
    else puts "#{directory} is not a directory! check it out!" and return
    end
  end
  
  def go
    if @directory
      Find.find @directory do |path|
        pathlite = path.gsub(@directory,'')
        if File.file? path
          File.open path do |f|
              tmp_line = f.total_lines  
             @contents.store(pathlite,tmp_line) 
             @total_lines += tmp_line
          end
        end
      end
      puts @total_lines
    end
  end
  
  def details
    @contents.each do |key,value|
      puts "#{key} file has lines of #{value}"
    end
  end
end

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt>8<tt> </tt>9<tt> </tt>10<tt> </tt>11<tt> </tt>12<tt> </tt>13<tt> </tt>14<tt> </tt>15<tt> </tt>16<tt> </tt>17<tt> </tt>18<tt> </tt>19<tt> </tt>20<tt> </tt>21<tt> </tt>22<tt> </tt>23<tt> </tt>24<tt> </tt>25<tt> </tt>26<tt> </tt>27<tt> </tt>28<tt> </tt>29<tt> </tt>30<tt> </tt>31<tt> </tt>32<tt> </tt>33<tt> </tt>34<tt> </tt>35<tt> </tt>36<tt> </tt>37<tt> </tt>38<tt> </tt>39<tt> </tt>40<tt> </tt>41<tt> </tt>42<tt> </tt>43<tt> </tt>44<tt> </tt>45<tt> </tt>46<tt> </tt>47<tt> </tt>48<tt> </tt>49<tt> </tt>50<tt> </tt>51<tt> </tt>52<tt> </tt>53<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">##<tt> </tt>## this is design for calculate the totals line of code in your project<tt> </tt>## version 1 @october 8th,2008 <tt> </tt>##<tt> </tt> <tt> </tt><tt> </tt>module Enumerable<tt> </tt> # function to get total lines for file<tt> </tt> def total_lines<tt> </tt> lines = 0<tt> </tt> each_with_index {|content,lines|}<tt> </tt> return lines+1<tt> </tt> end<tt> </tt>end<tt> </tt><tt> </tt><tt> </tt>class CheckLines<tt> </tt> require 'find'<tt> </tt><tt> </tt><tt> </tt> @check_type = %w{txt rb erb yml html css xml}<tt> </tt> def initialize(directory)<tt> </tt> @total_lines = 0<tt> </tt> if File.directory?(directory)<tt> </tt> @directory = directory <tt> </tt> @contents = {}<tt> </tt> self.go<tt> </tt> else puts "#{directory} is not a directory! check it out!" and return<tt> </tt> end<tt> </tt> end<tt> </tt> <tt> </tt> def go<tt> </tt> if @directory<tt> </tt> Find.find @directory do |path|<tt> </tt> pathlite = path.gsub(@directory,'')<tt> </tt> if File.file? path<tt> </tt> File.open path do |f|<tt> </tt> tmp_line = f.total_lines <tt> </tt> @contents.store(pathlite,tmp_line) <tt> </tt> @total_lines += tmp_line<tt> </tt> end<tt> </tt> end<tt> </tt> end<tt> </tt> puts @total_lines<tt> </tt> end<tt> </tt> end<tt> </tt> <tt> </tt> def details<tt> </tt> @contents.each do |key,value|<tt> </tt> puts "#{key} file has lines of #{value}"<tt> </tt> end<tt> </tt> end<tt> </tt>end</pre></td> </tr></table>

2008-10-08T09:15:41+08:00

71 项目文件行数计算

2008-10-08T09:15:41+08:00

ruby

sanitizer = HTML::FullSanitizer.new
sanitizer.sanitize("<p>This <u>is<u> a <a href='test.html'><strong>test</strong></a>.</p>")

sanitizer = HTML::LinkSanitizer.new
sanitizer.sanitize("<a href='almost'>on my mind</a>\n<A href='almost'>all day long</A>")

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">sanitizer = HTML::FullSanitizer.new<tt> </tt>sanitizer.sanitize("This is a <a href='test.html'>test</a>.")<tt> </tt><tt> </tt>sanitizer = HTML::LinkSanitizer.new<tt> </tt>sanitizer.sanitize("<a href='almost'>on my mind</a>\n<A href='almost'>all day long</A>")<tt> </tt></pre></td> </tr></table>

2008-09-26T18:14:56+08:00

70 sanitizer html in controller

2008-09-26T18:14:56+08:00

放到routes.rb的最后 ruby

twitter风格的url, http://xxx.com/devon
map.connect ':name', :controller => 'user', :action => 'show'

route所有path到某一个action
map.connect '*path' , :controller => 'blog' , :action => 'unrecognized'

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">twitter风格的url, http://xxx.com/devon<tt> </tt>map.connect ':name', :controller => 'user', :action => 'show'<tt> </tt><tt> </tt>route所有path到某一个action<tt> </tt>map.connect '*path' , :controller => 'blog' , :action => 'unrecognized'</pre></td> </tr></table>

2008-09-18T09:50:54+08:00

69 twitter风格的url

2008-09-18T09:51:57+08:00

"><%= render :partial => "score", :object => @exam_user %> ruby

function fixed_to_right(element, top) {
	this.move_score_show = function(){
		var arr = document.viewport.getScrollOffsets();
		var x = arr[0];
		var y = arr[1] + top;
		element.setStyle({top: y + "px"});
	}
	new PeriodicalExecuter(this.move_score_show, 0.1);
}

2008-09-16T02:10:16+08:00

68 定位在浏览器窗口右边

2008-09-16T02:12:34+08:00

ruby

require 'xmpp4r'
   
class Messager
    
    def initialize
        puts 'initialize'
        #Jabber::debug = true
        jid = Jabber::JID.new('alexys.cn@gmail.com')
        @client = Jabber::Client.new(jid)
        @client.connect
        @client.auth('×××××')
        @client.send(Jabber::Presence.new.set_show(:chat).set_status('Rails!'))
    end

    def send(addr ,msg)
        sendto = addr       
        #to = 'hlxwell@gmail.com'
        subject = "Kuxue task"
        msgbody = msg
        mail = Jabber::Message::new(sendto, msgbody).set_type(:normal).set_id('1').set_subject(subject)
        @client.send mail
    end

end
a=Messager.new()
a.send("xhan87@gmail.com",'hello ,I am the bot')

2008-08-26T14:54:32+08:00

67 ruby通过XMPP发送及时信息

2008-08-26T14:54:32+08:00

直对单个后缀的文件有用，对xxx.tar.gz型文件名需要修改 name.gsub! /^[^\.]+/, 'customed filename' ruby

class QuestionAttachment < ActiveRecord::Base
  belongs_to :question

  has_attachment :content_type => :image,
  :storage => :file_system, 
  :path_prefix => 'public/question_files'

  def sanitize_filename(filename)
    return unless filename
    returning filename.strip do |name| 

      name.gsub! /^[^\.]+/, 'customed filename'
    end
  end
end

2008-08-14T02:15:43+08:00

66 自定义attachment_fu插件上传的文件名

2008-08-14T02:15:43+08:00

没怎么严格测试。嘿嘿 ruby

require 'find'
require 'fileutils'
   
#   usage:   dir_move target-path (,local-path )
#   it will creat a directory if target-path is empty
#   TODO： add a option for u to choose whether replace everyting 
#   if local and target has same name but not the same type(file,directory)

def dir_move( target,dirpath=Dir.pwd)
    ## check if path valid
    if !File.directory?(dirpath)  
        puts "error first path"
        return
    elsif File.file?(target)
        puts "error :target is a file exist"
        return
    end
    ###
    Dir.mkdir target unless File.exist? target
    Find.find dirpath do |path|
        path_lite=path.gsub(dirpath,'')
        target_path=target+path_lite
        begin
            if File.directory? path
               Dir.mkdir target_path
            else
                FileUtils.copy path,target_path
            end
        rescue
            if type(path) != type(target_path)
            puts "waring: type unmatch, local=>#{path} is a #{type(path)},target=>#{target_path} is a #{type(target_path)}"
            end
        end
    end
    puts "everyting is ok"
end

def type(file)
    return unless File.exist? file
    if File.file? file
        "file"
    else
        "directory"
    end
end

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt>5<tt> </tt>6<tt> </tt>7<tt> </tt>8<tt> </tt>9<tt> </tt>10<tt> </tt>11<tt> </tt>12<tt> </tt>13<tt> </tt>14<tt> </tt>15<tt> </tt>16<tt> </tt>17<tt> </tt>18<tt> </tt>19<tt> </tt>20<tt> </tt>21<tt> </tt>22<tt> </tt>23<tt> </tt>24<tt> </tt>25<tt> </tt>26<tt> </tt>27<tt> </tt>28<tt> </tt>29<tt> </tt>30<tt> </tt>31<tt> </tt>32<tt> </tt>33<tt> </tt>34<tt> </tt>35<tt> </tt>36<tt> </tt>37<tt> </tt>38<tt> </tt>39<tt> </tt>40<tt> </tt>41<tt> </tt>42<tt> </tt>43<tt> </tt>44<tt> </tt>45<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">require 'find'<tt> </tt>require 'fileutils'<tt> </tt> <tt> </tt># usage: dir_move target-path (,local-path )<tt> </tt># it will creat a directory if target-path is empty<tt> </tt># TODO： add a option for u to choose whether replace everyting <tt> </tt># if local and target has same name but not the same type(file,directory)<tt> </tt><tt> </tt>def dir_move( target,dirpath=Dir.pwd)<tt> </tt> ## check if path valid<tt> </tt> if !File.directory?(dirpath) <tt> </tt> puts "error first path"<tt> </tt> return<tt> </tt> elsif File.file?(target)<tt> </tt> puts "error :target is a file exist"<tt> </tt> return<tt> </tt> end<tt> </tt> ###<tt> </tt> Dir.mkdir target unless File.exist? target<tt> </tt> Find.find dirpath do |path|<tt> </tt> path_lite=path.gsub(dirpath,'')<tt> </tt> target_path=target+path_lite<tt> </tt> begin<tt> </tt> if File.directory? path<tt> </tt> Dir.mkdir target_path<tt> </tt> else<tt> </tt> FileUtils.copy path,target_path<tt> </tt> end<tt> </tt> rescue<tt> </tt> if type(path) != type(target_path)<tt> </tt> puts "waring: type unmatch, local=>#{path} is a #{type(path)},target=>#{target_path} is a #{type(target_path)}"<tt> </tt> end<tt> </tt> end<tt> </tt> end<tt> </tt> puts "everyting is ok"<tt> </tt>end<tt> </tt><tt> </tt>def type(file)<tt> </tt> return unless File.exist? file<tt> </tt> if File.file? file<tt> </tt> "file"<tt> </tt> else<tt> </tt> "directory"<tt> </tt> end<tt> </tt>end<tt> </tt></pre></td> </tr></table>

2008-08-13T17:56:53+08:00

65 RUBY写的目录及文件复制代码

2008-08-13T17:56:53+08:00

ruby

在Application.rb中：

def rescue_action(exception) 
  exception.is_a?(ActiveRecord::RecordInvalid) ? render_invalid_record(exception.record)  
end 
def render_invalid_record(record) 
  @invalid_record = record 
  respond_to do |format| 
    format.html do 
      render :action => (record.new_record? ? 'new' : 'edit') 
    end 
    format.js do 
      render :update do |page| 
        page.alert @invalid_record.errors.full_messages.join("\n") 
      end 
    end 
  end 
end

在controller中：
def create 
  #... 
  @news.save! 
  redirect_to news_path(@news) 
end

2008-07-28T09:04:40+08:00

64 代码验证

2008-07-28T09:05:29+08:00

rhtml

<% if flash[:warning] or flash[:notice] %>  
  <div id="flash_message" <% if flash[:warning] %>class="warning"<% elsif flash[:notice] %>class='notice'<% end %> >  
    <%= flash[:warning] || flash[:notice] %>  
  </div>  
  <script type="text/javascript">  
    setTimeout("new Effect.Fade('flash_message');", 4000)  
  </script>  
<% end %>

2008-07-25T17:10:02+08:00

63 flash消息，4秒后消失

2008-07-25T17:10:11+08:00

ruby

namespace 'views' do
  desc 'Renames all your rhtml views to erb'
  task 'rename' do
    Dir.glob('app/views/**/*.rhtml').each do |file|
      puts `svn mv #{file} #{file.gsub(/\.rhtml$/, '.html.erb')}`
    end
  end
end

2008-07-13T00:23:32+08:00

62 rake task: 更改rhtml为html.erb

2008-07-13T00:23:32+08:00

ruby

require 'benchmark'
 
n = 100000
Benchmark.bm do |x|
   x.report('copy') { n.times do ; h = {}; h = h.merge({1 => 2}); end }
   x.report('no copy') { n.times do ; h = {}; h.merge!({1 => 2}); end }
end
 
#          user        system      total        real
# copy     0.460000   0.180000   0.640000 (  0.640692)
# no copy  0.340000   0.120000   0.460000 (  0.463339)

2008-07-11T09:19:15+08:00

61 Benchmark 代码效率

2008-07-11T09:19:15+08:00

ruby Exam.paginate :conditions=> ["users.id = ?", @user_id], :page => params[:page], :include => {:exam_users => :user}

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre><tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">Exam.paginate :conditions=> ["users.id = ?", @user_id], :page => params[:page], :include => {:exam_users => :user}</pre></td> </tr></table>

2008-06-28T16:01:43+08:00

60 include多对多关系

2008-06-28T16:01:43+08:00

/usr/local/lib/ruby/gems/1.8/gems/mongrel-x.x.x/bin/mongrel_rails ruby

if File.exist? defaults[:pid_file]
  # mongrels that crash can leave stale PID files behind, and these
  # should not stop mongrel from being restarted by monitors...
  pid = File.new(defaults[:pid_file]).readline
  unless `ps -ef | grep #{pid} | grep -v grep`.length > 0
    # use "ps ax" for freebsd 
    log "!!! PID file #{defaults[:pid_file]} exists, but is stale, and will be deleted so that this mongrel can run."
    File.delete(defaults[:pid_file])
  else
    log "!!! PID file #{defaults[:pid_file]} already exists and the process id referred to in it is running.  This mongrel is probably already running.  #{defaults[:log_file]} for errors.  EXITING."
    exit 1
  end
end

2008-06-27T15:41:49+08:00

59 mongrel重启时清除过期的pid_file

2008-06-27T15:41:49+08:00

ruby

class Account < ActiveRecord::Base
  ReservedSubdomains = %w[admin blog dev ftp mail pop pop3 imap smtp stage stats status www]
  validates_exclusion_of :subdomain, :in => ReservedSubdomains, :message => 'is not allowed'
end

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt>3<tt> </tt>4<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }">class Account < ActiveRecord::Base<tt> </tt> ReservedSubdomains = %w[admin blog dev ftp mail pop pop3 imap smtp stage stats status www]<tt> </tt> validates_exclusion_of :subdomain, :in => ReservedSubdomains, :message => 'is not allowed'<tt> </tt>end</pre></td> </tr></table>

2008-06-25T09:51:27+08:00

58 保留二级域名

2008-06-25T09:51:27+08:00

<%= will_paginate @photos, :renderer => 'RemoteLinkRenderer' %> ruby

# helpers/remote_link_renderer.rb

class RemoteLinkRenderer < WillPaginate::LinkRenderer
  def page_link_or_span(page, span_class = 'current', text = nil)
    text ||= page.to_s
    if page and page != current_page
      @template.link_to_remote text, :url => url_for(page), :method => :get
    else
      @template.content_tag :span, text, :class => span_class
    end
  end
end

2008-06-13T14:44:55+08:00

57 will_paginate with ajax

2008-06-13T14:44:55+08:00

然后，在config中增加application.yml，在里面以YML方式写入配置，比如： hello: ‘world’ 则，在程序中，可以直接引用： AppConfig.hello。也可以在程序中对配置项赋值，比如 AppConfig.hello = ‘cool’ ruby

# 在config/initializers中新增文件 app_config.rb

module ApplicationConfiguration
  require 'ostruct'
  require 'yaml'
  if File.exists?( File.join(RAILS_ROOT, 'config', 'application.yml') )
    file = File.join(RAILS_ROOT, 'config', 'application.yml')
    users_app_config = YAML.load_file file
  end

  ::AppConfig = OpenStruct.new users_app_config
end

2008-06-12T14:07:04+08:00

56 Rails中用YML配置项目

2008-06-12T14:07:04+08:00

ruby

require 'uri'
require 'cgi'

foo = "http://google.com?query=hello"

uri_good = URI.escape(foo, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
cgi_good = CGI.escape(foo)


或者

require 'uri'
foo = "http://google.com?query=hello"

bad = URI.escape(foo)
good = URI.escape(foo, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))

bad_uri = "http://mysite.com?service=#{bad}&bar=blah"
good_uri = "http://mysite.com?service=#{good}&bar=blah"

puts bad_uri
# outputs "http://mysite.com?service=http://google.com?query=hello&bar=blah"

puts good_uri
# outputs "http://mysite.com?service=http%3A%2F%2Fgoogle.com%3Fquery%3Dhello&bar=blah"

2008-06-11T12:45:43+08:00

55 url escape

2008-06-11T12:45:43+08:00

其它方案： http://d.hatena.ne.jp/zariganitosh/20070613 http://script.aculo.us/docs/Ajax.InPlaceEditor.html http://seb.box.re/2008/2/3/patch-for-inplaceeditor-adding-editonblank-feature rhtml

<span id="name_<%= @student.id %>">Name:</span>
<%= in_place_editor_field :student, :name, {}, :external_control => "name_#{@student.id}" %>

<table class="CodeRay"><tr> <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre>1<tt> </tt>2<tt> </tt></pre></td> <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }"><span id="name_<%= @student.id %>">Name:<tt> </tt><%= in_place_editor_field :student, :name, {}, :external_control => "name_#{@student.id}" %></pre></td> </tr></table>

2008-05-21T11:11:14+08:00

53 in_place_editor_field: 空值时的处理方式之一

2008-05-21T11:51:41+08:00