RUBY ON RAILS STUFF

A cheat sheet!
http://blog.nanorails.com/pages/rails-1-1-cheat-sheet
 
 
String:
quote = 'quotes are pretty basic but need to be lowercase'
 
Symbols:
:hamster
:cow 
:guineapig
 
Constants:
EmpireStateBuilding = "350 5th Avenue, NYC, NY"
 
Methods:
front_door.open 
front_door.open.close 
front_door.is_open? 
front_door.paint( 3, :red ) 
front_door.paint( 3, :red ).dry( 30 ).close() 
 
Class Methods:
Door::new( :oak )
 
Global Variables:
$x, $1, $chunky and $CHunKY_bACOn are examples. 
 
Instance Variables:
@x, @y
 
Class variables:
@@x, @@y
 
Blocks:
2.times { print "Yes, I've used chunky bacon in my examples, but never again!" }
 
Ranges:
(1..3) is a range, representing the numbers 1 through 3. 
('a'..'z') is a range, representing a lowercase alphabet. 
(0...5) represents the numbers 0 through 4.
 
Arrays:
[1, 2, 3] is an array of numbers. 
['coat', 'mittens', 'snowboard'] is an array of strings. 
 
Hashes:
{ 
   'name' => 'Peter', 
   'profession' => 'lion tamer', 
   'great love' => 'flannel' 
 } 
 
 
Emptyness:
plastic_cup = nil 
plastic_cup = false 
 
IF and UNLESS:
if plastic_cup 
   print "Plastic cup is on the up 'n' up!" 
end 
 
unless plastic_cup 
    print "Plastic cup is on the down low." 
end 
 
<%= link_to 'host', item.from if item.from != "" -%>
 
print "Yeah, plastic cup is up again!" if plastic_cup 
print "Hardly. It's down." unless plastic_cup 
 
print "We're using plastic 'cause we don't have glass." if plastic_cup unless glass_cup 
**WHEY**
 
leading zeroes:
"%05d" % 200 
gives "00200"
 
assigning dependent on...
at_hotel = true 
email = if at_hotel 
        "[email protected]" 
    else 
        "[email protected]" 
    end 
 
--- looping through an array with a counter
<% @items.each_with_index do |item, index| %>
    <%= index+1 %>.
    <%= item.name %>
<% end %>
 
--- ANY ? ---
@sections.any? { |section| section.is_a?(String) }
 
--- IS AN ARRAY ? ---
@sections.is_a?(Array)
 
--- forms ---
 <%= f.hidden_field :has_manufacture, :value => "No" %>
 
--- count() ----
   nav_items = navItems.size
   nav_items = navItems.length
 
--- if / else --
if x == y 
    beeroclock = 'now'
elsif 
    beeroclock = 'later'
else 
    beeroclock = 'over'
end
 
 
--- logging ---
logger.warn "Failed login for '#{params[:email]}' from #{request.remote_ip} at #{Time.now.utc}"
 
---- sorting and eaching ----
<% @posts = Post.find(:all, :order => 'created_at DESC')  %>
<% @posts.each do |post| %>
    something
<% end %>
 
---- more find examples ----
@items = @user.items.find(:all, :order => 'id DESC').paginate(:per_page => 100, :page => params[:page])
 
---- STRING MANIPULATION ----
truncate(neighbourhood.description, :length => 260)
pluralize(post.responses.size,'response')
 
----
to_formatted_s
to_param
to_query
to_sentence
to_xml
 
http://api.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Array/Conversions.html#M000274
 
--- SCRIPT --- 
script/server                        - start server
script/console                       - run console with all models...
script/server -p 3001 -d             - run server on port 3001 and detatch the console 
                                     - ( use ps aux & kill to stop it )
script/server -p 3001 -e production  - run server in production & on port 3001
 
--- DEBUGGING ---
In A View
 
<%= debug @object %>
<%= debug 'string' %>
<%= 'string'.inspect %>
 
In A Controller
 
logger.debug "The object is #{@object}"
RAILS_DEFAULT_LOGGER.debug @object
 
---- RAKE ----
rake -T ( is the shit )
 
install, unpack and build gems in a rails project:
rake gems:install 
rake gems:unpack
rake gems:build
rake routes -- gets you all the routs in your project
 
point to -> production 
rake db:migrate RAILS_ENV=production
 
clear ruby on rails cache
rake tmp:cache:clear
 
generate:
script/generate migration MyNewMigration
script/generate controller static
 
---- Mongrel ----
STOP MONGREL --daemon
http://www.cyberciti.biz/faq/kill-process-in-linux-or-terminate-a-process-in-unix-or-linux-systems/
 
-- kill deamon --
ps aux (to get the id)
kill id 
 
-- SNIPS --
<%= link_to "#{image_tag("go_back.png")}Go Back", user_path(@user) %>
 
 
FINDERS ----------------------------
    oldEntries = Posts.find( :all, :conditions => ['visible = ? and created_at <= ?', 'yes', (Time.now - daysToKeep.days)])
 
SCOPES -----------------------------
 
Inside the model:
  default_scope :order => 'name ASC'
  Entry.named_scope :lastweek, :conditions => ["created_at > ?", 7.day.ago]
  Entry.named_scope :isvisible, :conditions => {:visible => 'yes'}
 
  -- lambda makes sure the current date is uses and not a cached? one
  Entry.named_scope :lastweek, lambda {
    {:conditions => ["created_at > ?", 7.day.ago]}
  }
 
  -- Entries with AND ( headline AND blurb need to be 'bmx' )
  Entry.scope_procedure :awesome, lambda { headline_like("bmx").blurb_like("bmx") }
 
  -- Entries with OR ( headline OR blurb need to be 'bmx' )
  Entry.scope_procedure :awesome, lambda { headline_like_or_blurb_like("bmx") }
 
  Entry.named_scope :with_recent_orders, :conditions => ["comments.created_at >= ?", 1.week.ago]
 
RENDER --------------------------
  render :partial => "person", :locals => { :name => "david" }
  render :partial => "person", :object => @new_person
  render :partial => "person", :collection => @winners
  render :partial => "admin_person", :collection => @winners, :as => :person
  render :partial => "person", :collection => @winners, :spacer_template => "person_divider"
  render :partial => "shared/note", :collection => @new_notes
  render :partial => "broken", :status => 500
  more:  http://apidock.com/rails/ActionController/Base/render