Ruby on Rails (the cool parts)

3VCZPO3BJMT the cool parts ( )

8IBU`T$PPM "CPVU3BJMT %BUBCBTF.BOBHFNFOU 5IF"TTFU1JQFMJOF #VJMEJOH8FC'PSNT

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations %POFXJUI3BJMT.JHSBUJPOT w"MMDIBOHFTBSFDSFBUFEJOB3VCZpMF w%BUBCBTF"HOPTUJD w4ZODISPOJ[F&OWJSPONFOUT

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations $ rails g model Product title:string description:text price:decimal
db/migrate/2013010801384833_create_products.rb

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations class CreateProducts < ActiveRecord::Migration def up create_table :products
do |t| t.string :title t.text :description t.decimal :price t.timestamps end end def down drop_table :products end end

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations class CreateProducts < ActiveRecord::Migration def change create_table :products
do |t| t.string :title t.text :description t.decimal :price t.timestamps end end end

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations 1. add_column 2. add_index 3. change_column 4. change_table
5. create_table 6. drop_table 7. remove_column 8. remove_index 9. rename_column

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations 1. add_column :table_name, :column_name, :type 2. add_index, :table_name,
:column_name 3. change_column :table_name, :column_name, :type 4. change_table :table_name, options = {} 5. create_table :table_name, options = {} 6. drop_table :table_name 7. remove_column :table_name, *columns 8. remove_index :table_name, *columns 9. rename_column :table_name, :old_name, :new_name

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations $ rails g migration add_category_id_to_products category_id:integer db/migrate/2013010801448284_add_category_id_to_products.rb

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations class AddCategoryIdToProducts < ActiveRecord::Migration def change add_column :products,
:category_id, :integer end end

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations $ rake db:migrate

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations $ rake db:migrate == CreateProducts: migrating ================================================= --
create_table(:products) -> 0.0055s == CreateProducts: migrated (0.0056s) ======================================== == AddCategoryIdToProducts: migrating ======================================== -- add_column(:products, :category_id, :integer) -> 0.0015s == AddCategoryIdToProducts: migrated (0.0016s) ===============================

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations db/schema.rb ActiveRecord::Schema.define(:version => 2013010801448284) do create_table "products", :force
=> true do |t| t.string "title" t.text "description" t.decimal "price" t.datetime "created_at", :null => false t.datetime "updated_at", :null => false t.integer "category_id" end end

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations $ rake db:schema:load

%BUBCBTF.BOBHFNFOU http://bit.ly/rails-migrations %POFXJUI3BJMT.JHSBUJPOT w"MMDIBOHFTBSFDSFBUFEJOB3VCZpMF w%BUBCBTF"HOPTUJD w4ZODISPOJ[F&OWJSPONFOUT

w1VMMTpMFTGSPNNVMUJQMFMPDBUJPOTJOUPPOF w3FNPWFTBl+VOL%SBXFSzPG+BWBTDSJQUpMFT w$PNQJMFTBOE$PNQSFTTFTUIFpMFT w"EETBCFUUFSDBDIFJOHTZTUFN 5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF javascripts !"" bootstrap-dropdown.js !"" bootstrap-modal.js !"" bootstrap-popover.js !"" bootstrap-typeahead.js
!"" content-tabs.js !"" lightbox.js !"" jquery-ui.js !"" jquery-ui.progress-bar.js !"" jquery.anything-slider.js !"" navigation-tabs.js #"" site.js http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF OFVTSBNCMJOHTCMPHTQPUDPN http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF javascripts !"" bootstrap-dropdown.js !"" bootstrap-modal.js !"" bootstrap-popover.js !"" bootstrap-typeahead.js
!"" content-tabs.js !"" lightbox.js !"" jquery-ui.js !"" jquery-ui.progress-bar.js !"" jquery.anything-slider.js !"" navigation-tabs.js #"" site.js http://bit.ly/asset-pipeline

. !"" app $ #"" assets $ !"" javascripts $
#"" stylesheets !"" lib $ #"" assets $ !"" javascripts $ #"" stylesheets #"" vendor #"" assets !"" javascripts #"" stylesheets 5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline app/assets/js lib/assets/js vendor/assets/js !"" content-tabs.js #"" navigation-tabs.js !""
bootstrap $ !"" dropdown.js $ !"" modal.js $ !"" popover.js $ #"" typeahead.js !"" bootstrap.js !"" lightbox.js !"" jquery-ui.js !"" jquery-ui.progress-bar.js #"" jquery.anything-slider.js #"" site.js

5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline //= require bootstrap/dropdown //= require bootstrap/modal //= require
bootstrap/popover //= require bootstrap/typeahead CPPUTUSBQKT

5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline . #"" app #"" assets !"" javascripts/ #""
stylesheets/ application.js application.css

. #"" app #"" assets !"" javascripts/ #"" stylesheets/ 5IF"TTFU1JQFMJOF
application.js application.css http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF //= require jquery //= require jquery_ujs //= require bootstrap
//= require_tree . /* *= require jquery-ui/datepicker *= require_self *= require_tree . */ application.js application.css http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline <%= javascript_include_tag "application" %>

5IF"TTFU1JQFMJOF

5IF"TTFU1JQFMJOF $ rake assets:precompile http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF $ rake assets:precompile . #"" app #"" assets !""
javascripts/application.js #"" stylesheets/application.css http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF public #"" assets !"" application-1b13569e9620782f423d4cd3ce931750.css !"" application-1b13569e9620782f423d4cd3ce931750.css.gz !"" application-32ed6ebaba49211fc69e08f40c7b97c4.js
!"" application-32ed6ebaba49211fc69e08f40c7b97c4.js.gz !"" application.css !"" application.css.gz !"" application.js !"" application.js.gz !"" manifest.yml !"" rails-a3386665c05a2d82f711a4aaa72d247c.png #"" rails.png http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF <%= javascript_include_tag "application" %> <script src="/assets/application-32ed6eb...c7b97c4.js"></script> http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline

5IF"TTFU1JQFMJOF $ rake assets:precompile http://bit.ly/asset-pipeline

w1VMMTpMFTGSPNNVMUJQMFMPDBUJPOTJOUPPOF w3FNPWFTBl+VOL%SBXFSzPG+BWBTDSJQUpMFT w$PNQJMFTBOE$PNQSFTTFTUIFpMFT w"EETBCFUUFSDBDIFJOHTZTUFN 5IF"TTFU1JQFMJOF http://bit.ly/asset-pipeline

w$POWFOUJPOPWFS$POpHVSBUJPO w*OUFHSBUFTOJDFMZXJUI"DUJWF3FDPSE w#VJMEDPNQMFYGPSNT #VJMEJOH8FC'PSNT http://bit.ly/rails-forms

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms Product.new({ :title => "Cheese Crackers", :price => 3.99
})

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms Product.new(:title => "Cheese Crackers", :price => 3.99)

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms <form action="/products" method="post">  <label for="title">Title</label>
<input type="text" name="title" id="title" />  <label for="price">Price</label> <input type="number" name="price" id="price" />  <input type="submit">Create Product</input> </form>

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms <%= form_for Product.new do |f| %>  <%= f.label :title %> <%= f.text_field :title %>  <%= f.label :price %> <%= f.number_field :price %>  <%= f.submit %> <% end %>

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms  <label for="product_title">Title</label> <input type="text" name="product[title]"
id="product_title" />  <label for="product_price">Price</label> <input type="number" name="product[price]" id="product_price" />

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms params[:product]

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms params[:product] # {:title=>"My Product", :price=>12.5}

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms params[:product][:title] # "My Product" params[:product] # {:title=>"My Product",
:price=>12.5}

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms Product.new(:title => "My Product", :price => 12.5)

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms # POST /products def create @product = Product.new(params[:product])
end

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms lTUSPOHQBSBNFUFSTz github.com/rails/strong_parameters

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms class ProductsController < ApplicationController # POST /products def
create @products = Product.new(product_params) end private def product_params params.require(:product).permit(:title, :price) end end

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms # product_variation.rb class ProductVariation belongs_to :product end

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms # product.rb class Product has_many :product_variations end

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms <%= form_for @product do |f| %> <ul> <%=
f.fields_for :product_variations do |builder| %> <li> <%= builder.label :title %> <%= builder.text_field :title %> <br /> <%= builder.label :price, "$" %> <%= builder.number_field :price %> </li> <% end %> </ul> <% end %>

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms

#VJMEJOH8FC'PSNT http://bit.ly/rails-forms # product.rb class Product has_many :product_variations accepts_nested_attributes_for :product_variations,
:reject_if => lambda { |a| a[:title].blank? } end

w$POWFOUJPOPWFS$POpHVSBUJPO w*OUFHSBUFTOJDFMZXJUI"DUJWF3FDPSE w#VJMEDPNQMFYGPSNT #VJMEJOH8FC'PSNT http://bit.ly/rails-forms

Ruby on Rails (the cool parts)

Ruby on Rails (the cool parts)

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