ruby on rails3 study notes

use rails 3.2.5 version
build project:
rails new {project_name} -d mysql
running rails server:
script/rails server -p 80
the first form:
add route in config/routes.rb
root :to => "posts#new" //set the home page
get "posts/new" //a new route that only responds to GET requests,
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script/rails generate controller post new //"new" is the method name
vi app/views/posts/new/html.erb //add the following code
<%= form_for :post, :url => { :action => :create } do |f| %>
//:url => { :action => :create } set post action
<p>
<%= f.label :title %> <br>
<%= f.text_field :title %>
</p>
<p> <%= f.label :text %> <br>
<%= f.text_area :text %>
</p>
<p> <%= f.submit %> </p>
<% end %>
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vi config/routes.rb //add following post route
post "posts/create"
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vi app/controllers/posts_controller.rb //add method create

class PostsController < ApplicationController

def new

end

def create

#render :text => params[:post].inspect

//The render method here is taking a very simple hash with a key of text and value of params[:post].inspect

@post = Post.new(params[:post])

@post.save

redirect_to :action => :show, :id => @post.id

//save data to database

end

def show

@post = Post.find(params[ :id ])

end

end

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rails generate model Post title:string text:text //create the post model

//this command will create a database structure file

//app/models/post.rb anddb/migrate/20120419084633_create_posts.rb

(name could be a bit different)

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rake db:migrate

//Rails will execute this migration commond and tell you it created the post table

//Because you’re working in the development environment by default

//If the production environment you must explicitly pass it when invoking the commond

//rake db:migrate RAILS_ENV=production.

Open config/routes.rb and add the following route:

get "posts/:id" => "posts#show"

open app/view/posts/show.html.erb and add the following content:

< p >

< strong >Title:</ strong >

<%= @post .title %>

</ p >

< p >

< strong >Text:</ strong >

<%= @post .text %>

</ p >

5.8 Listing all posts
http://edgeguides.rubyonrails.org/getting_started.html
to be continued......