Rails Notes:

default

 
ruby -v
Display ruby version installed

rails -v
Show rails version installed.

mkdir /someplace/railsites && cd /someplace/railsites
Create a directory for rails projects and change
to that directory.

rails new mySuperApp
rails new ~/someplace/railsites/mySuperApp
Creates a skeleton structure for new rails application.
The first example would create it in the current folder.


rails server
rails s
Start rails server (WEBrick).
The second example is just a shorter version.
Make sure you are in the new apps folder you just created.
If you an execjs, could not find a javascript runtime error:
Try installing: nodejs

http://localhost:3000/
Take your browser here and make sure it is working.


Create first test site.
-----------------------

rails generate controller Pages home
Generates a controller and some pages including one called home.
You can create more pages by:
rails generate controller Pages home about gallery
But we can add them later also.


http://localhost:3000/pages/home
Now you can view the page called home.
It will tell you where it's .erb location is.

app/controllers/pages_controller.rb
This also created a pages controller.

config/routes.rb
It also created a routes.rb
This file maps urls to the files on disk.
You can view it to see how the home page above is mapped with a get.

We can set this as the default page by editing the routes.rb and
commenting the 'get' line and adding a 'root' line that points
to the home page that was created above. Only edit these lines
and leave the rest alone.

Edit routes.rb:
---------------
#get 'pages/home'
root 'pages#home'
------------------
end-edit-routes.rb


http://localhost:3000/
Now going here will will be the pages/home file.

Edit routes.rb again and add an about page. Now the lines that
have changed in this file are:

Edit config/routes.rb:
----------------------
#get 'pages/home'
get 'about' => 'pages#about'
root 'pages#home'
-----------------
end-edit-routes.rb


Now add an action to pages_controller.rb, using: def action end

Edit: app/controllers/pages_controller.rb
-----------------------------------------
class PagesController < ApplicationController
  def home
  end

  def action
  end

end
-----------------------
end-pages_controller.rb


A view still need to be created for this about page.

Edit views/pages/about.html.erb
-------------------------------
Hi I am a rails master. This is my best page.
All your internets belong to me, now.
------------------
end-about.html.erb

http://localhost:3000/about
Now go to about page and be what your read. 


To add or edit content that is on every page, like links,
header, footer etc. Edit the application.html.erb file.
Adding these lines in the appropriate place, the first
two are the links, the last three are the footer.:
<%= link_to "Home", root_path %>
<%= link_to "About", about_path %>




Edit: app/views/layouts/application.html.erb
--------------------------------------------



  My Rails Study Guide
  <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
  <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
  <%= csrf_meta_tags %>



<-- Links -->
<%= link_to "Home", root_path %>
<%= link_to "About", about_path %>

<%= yield %>

<-- Footer -->




------------------------
end-application.html.erb


If the application page starts getting to cluttered, and your prefer
the links and headers to be in seperate files. You could do this instead:

Create a header page, _footer.html.erb:

Edit: app/views/layouts/_footer.html.erb
----------------------------------------
<%= link_to "Home", root_path %>
<%= link_to "About", about_path %>
--------------------
end-_footer.html.erb


Create a footer page, _header.html.erb:
 
Edit: app/views/layouts/_header.html.erb
----------------------------------------

--------------------
end-_header.html.erb


Now the applicatins.html.erb can be changed by adding
two render lines:

<%= render 'layouts/header' %>


<%= render 'layouts/footer' %>


Edit: app/views/layouts/application.html.erb
--------------------------------------------



  My Rails Study Guide
  <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
  <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
  <%= csrf_meta_tags %>




<%= render 'layouts/header' %>

<%= yield %>


<%= render 'layouts/footer' %>



------------------------
end-application.html.erb


End-create first test site
--------------------------




Create another site. Go back to the /someplace/railsites
folder and create a new site that will be a picture gallery.

Create gallery site
-------------------

cd /someplace/railsites 
rails new gallery
cd gallery
rails server

http://localhost:3000/
Make sure site is up and running in a browser.

----------------
end-gallery-site




Books
-----
Ruby on Rails Tutorial, Learn Rails by Example
Beginning Ruby
The Well-Grounded Rubyist
Eloquent Ruby
The Ruby Way

Rails Resources
---------------
RailsCasts
Tealeaf Academy
Code School
Rails Guides
Rails for Zombies

IDEs
----
RadRails
RubyMine

default