rails 3 two lines install


    gem install i18n tzinfo builder memcache-client rack rack-test rack-mount erubis mail text-format thor bundler

gem install rails --pre
    2010-02-20T16:31:50Z
    
    211
    42
    false
    rails 3 two lines install 
    2010-02-20T16:31:50Z
    7


    module ActionView 
  module Helpers 
    class InstanceTag 
      def to_label_tag_with_i18n(text = nil, options = {}) 
        text ||= object.class.human_attribute_name(method_name) if object.class.respond_to?(:human_attribute_name) 
 
        to_label_tag_without_i18n(text, options) 
      end 
 
      alias_method_chain :to_label_tag, :i18n 
    end 
  end 
end
    2009-11-22T19:42:31Z
    rails 2.3.4 doen't have i18n support in labels  
http://lawrencesong.net/2009/04/i18n-label-in-rails-monkey-patch/
    206
    39
    false
    i18n in labels
    2009-11-22T19:42:31Z
    7


    rake paperclip:refresh class=MyClass
    2009-10-26T14:50:39Z
    run this task
    205
    42
    false
    paperclip refresh all images
    2009-10-26T14:50:39Z
    7


    class MyModel < ActiveRecord::Base
  default_scope :order => 'created_at desc'
end
    2009-10-04T16:55:05Z
    
    204
    39
    false
    use default_scope to set up default find conditions such as order
    2009-10-04T16:55:05Z
    7


    class User < ActiveRecord::Base

  HUMANIZED_ATTRIBUTES = {
    :email => "E-mail address"
  }

  def self.human_attribute_name(attr)
    HUMANIZED_ATTRIBUTES[attr.to_sym] || super
  end

end
    2009-08-22T17:00:45Z
    
    202
    39
    false
    humanized attributes
    2009-08-22T17:00:45Z
    7


    validates_attachment_content_type :image,
  :content_type => [
    'image/jpeg',
    'image/pjpeg', # for progressive jpeg (IE mine-type for regular jpeg) 
    'image/png',
    'image/x-png', # IE mine-type for PNG
    'image/gif'
]
    2009-08-16T21:43:37Z
    
    191
    39
    false
    paperclip ie validation
    2009-08-16T21:43:37Z
    7


    duplicates = User.find( :all,
  :select     => "email, COUNT(email) AS duplicate_count",
  :conditions => "email IS NOT NULL AND email != ''",
  :group      => "email HAVING duplicate_count > 1"
)
    2009-07-18T01:52:55Z
    having example in rails. from: http://blog.grayproductions.net/articles/five_activerecord_tips
    187
    39
    false
    finding duplicates entries
    2009-07-18T01:52:55Z
    7


    >> require 'hirb'
=> []
>> Hirb.enable
=> nil
>> Exam.find(:all, :limit => 5)
+----+----------+----------+----------+----------+---------+----------+------+
| id | title    | exam     | creat... | updat... | user_id | categ... | hits |
+----+----------+----------+----------+----------+---------+----------+------+
| 1  | Simul... | Simul... | 2009-... | 2009-... | 1       | 1        | 152  |
| 2  | Simul... | Simul... | 2009-... | 2009-... | 1       | 1        | 143  |
| 3  | Espec... | Espec... | 2009-... | 2009-... | 1       | 1        | 1089 |
| 4  | Espec... | Espec... | 2009-... | 2009-... | 1       | 1        | 80   |
| 5  | Espec... | Espec... | 2009-... | 2009-... | 1       | 1        | 40   |
+----+----------+----------+----------+----------+---------+----------+------+
5 rows in set
>>
    2009-07-01T20:20:37Z
    to install: 
gem install cldwalker-hirb --source http://gems.github.com
    183
    39
    false
    hirb example
    2009-07-01T20:20:37Z
    7


    @files = Dir.glob("public/files/*")

for file in @files
    puts file
end
    2009-06-28T00:02:54Z
    
    182
    39
    false
    listing files in a directory with rails
    2009-06-28T00:02:54Z
    7


    validates_format_of :email, 
:with => /^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/, 
:message => "is invalid" 
    2009-06-21T21:30:36Z
    
    180
    39
    false
    email regex 
    2009-06-21T21:30:36Z
    7