PavloConan

## Simple HTML example
<ul class="example">
  <li id="first"> This </li>
  <li id="second"> Looks </li>
  <li id="third"> Ok </li>
</ul>

## Simple HTML.HAML example
%ul {:class => "example"}
  %li {:id => "first"} This
  %li {:id => "second"} Looks
  %li {:id => "third"} Better

## Even simpler HTML.HAML example
%ul.example
  %li#first This
  %li#second Looks
  %li#third Best

## Simple html.erb example
<div class="example">
<% for @item in @shopping_list %>
    <%= @item %>
  <% end %>
</div>

## Html.erb to html.haml
.example
  - for @item in @shopping_list
    = @item

## Generating comment model in rails console
$ rails generate model Comment body:text blog_post:references

## comment.rb
class Comment < ActiveRecord::Base
  belongs_to :blog_post
end

## #timestamp_create_comments.rb
class CreateComments < ActiveRecord::Migration
  def change
    create_table :comments do |t|
      t.text :body
      t.references :blog_post

      t.timestamps
    end
  end
end

## migration
$ rake db:migrate

## #timestamp_add_user_id_to_comments.rb
class AddUserIdToComments < ActiveRecord::Migration
  def change
    add_column :comments, :user_id, :integer
    add_index :comments, :user_id
  end
end
	<ul class="example">
	<li id="first"> This </li>
	<li id="second"> Looks </li>
	<li id="third"> Ok </li>
	</ul>
	%ul {:class => "example"}
	%li {:id => "first"} This
	%li {:id => "second"} Looks
	%li {:id => "third"} Better
	<div class="example">
	<% for @item in @shopping_list %>
	<%= @item %>
	<% end %>
	</div>
	class CreateComments < ActiveRecord::Migration
	def change
	create_table :comments do \|t\|
	t.text :body
	t.references :blog_post

	t.timestamps
	end
	end
	end
	class AddUserIdToComments < ActiveRecord::Migration
	def change
	add_column :comments, :user_id, :integer
	add_index :comments, :user_id
	end
	end