Ruby on windows with mongodb

setting up ruby for windows, like anything windows these days, is more annoying then the other environments, especially Linux. Here are some key point I hope will save you some time:

  1. Ruby installer for windows, is only the start. it's located here. while you're there, don't stop with the installer: make sure to download the development kit (Development Kit section). You'll need it later on. make sure to extract it in a simple path, e.g. c:\devkit or alike. don't use spaces or special characters.
  2. Once ruby is installed, lets check the gem operation: if you can run gem update –system without an error – great, but if not, here is what you need to do: download the pem file here and save it in your rubygems/ssl_certs/ folder. now, the command should be executed correctly.
  3. lets update the system with

     

     

    gem update

     

  4. To install mongo, lets run

     

     

    gem install mongo
    
    gem install bson_ext

     

  5. The last one will install bson in C which is much faster. great? sure, but it's not going to work (Windows). so now what? first, lets go to the install folder of this gem (..lib/ruby/gems/[version]/gems/bson_ext[xxx]/ using cmd.
  6. once there open the cbson.c file that is located inside of ext/cbson folder. make sure that you have a reference to winsock2 and not arpa/inet. note that it is existed in more advanced versions, so if it's there, you don't need to change it. This is how it should looks like:

     

    #ifdef _WIN32
    #include <winsock2.h>
    #else
    #include <arpa/inet.h>
    #include <sys/types.h>
    #endif

    note that if you already have this file, your installation might actually work, so you can skip directly to the test code below.

  7. next, you need to setup your devkit installment, so go to your devkit folder, and run

    ruby dk.rb init

    . this will generate the config.yml file in that folder.

  8. edit this file, making sure that it contains the ruby path at its end, like this: – c:/ruby. note the spaces and the backslash. these are not typos.
  9. next run ruby

    dk.rb install

    .

  10. in your command window that is in the gem folder, run gem build bson_ext.gemspec.
  11. move the new gem c
  12. delete the entire bson_ext gem folder
  13. Run:

    gem install bson_ext-1.11.1.gem --local

     

  from within the folder you've saved that gem.

Starter code:

require 'rubygems'
require('mongo')
puts('testing mongo...')

if you can run this code without an error or a mongo warning claiming that you are not using bson_ext, you are good to go!

 

Quick Ruby application with Scaffolding

scaffolding is a quick way to generate most of the parts of a ROR application. If you want to create the models, views, and controllers for a new resource in a single operation, scaffolding is the tool for the job. Clearly, the code scaffolding generates is unlikely to be a perfect for your application, and in some cases  Rails developers avoid scaffolding entirely.

lets create a scaffold-ed post:

$ rails generate scaffold Post name:string title:string content:text

That’s it!

you might want to take look here

Starting Ruby on rails

What is Rails?

ROR is a web development framework written with Ruby. It is designed to make programming web applications easier by making assumptions about what every developer needs to get started. It allows you to write less code while accomplishing more than many other languages and frameworks. Some developers also say that it makes web application development more fun…

Like many dev programs, ROR is also MVC based.

downloading rails: you can download ruby from here.

  1. Creating application folder. very easy, just key in rails new blog in your command. This will create a Rails application called Blog in a directory called blog.
  2. DB configuration: like many other applications, you will probably use a DB to store the information. You can connect to mysql DB like so:
    development:
      adapter: mysql2
      encoding: utf8
      database: blog_development
      pool: 5
      username: root
      password:
      socket: /tmp/mysql.sock this info goes to your config/database.yml file.
  3. Now that you have your database configured, it’s time to have Rails create an empty database for you. You can do this by running a rake command:$ rake db:create
  4. Starting rail server is easy, just key in $ rails server.
  5. If you didn’t change the defaults, you are listening on port 3000.