Become web developer using Ruby on Rails

If you are a newbie to programming and want to become web developer means the best place is to start with Ruby on Rails shortly called as (ROR), Ruby is easy to learn language and ROR is fully configured frame work so you can directly work with your first database backed website with in a days.

In this article, I will give you idea about where you to start and end. There are four steps involved in web development they are.

  • Getting knowledge in basic things like HTML,CSS,JS
  • Familiar with databases and database queries
  • Basics of ruby
  • Learning ROR
  • Going deep with ROR

 

  1. Basics

In my opinion he best place to familiar with HTML,CSS and JS is w3schools or tutorials point. Both have interactive tutorials so you can run your code directly on the browser, and they don’t charge for any tutorial.

HTML –       https://www.w3schools.com/html/

https://www.tutorialspoint.com/html/

CSS –            https://www.w3schools.com/css/default.asp

https://www.tutorialspoint.com/css/

JavaScript – https://www.w3schools.com/js/default.asp

https://www.tutorialspoint.com/javascript/

2. Databases

Once you complete this you will familiar with how static websites are working, now it is the time to move with dynamic websites for this we have to study about databases. At first study about databases little bit and work with SQL databases (Later you may move to any database you wish).

For this also go with tutorials point, in Rails we don’t directly write database queries it is enough to understand basics of SQL and queries (for now).

SQL – https://www.tutorialspoint.com/sql/index.htm

3. Ruby

There are lot of ruby tutorials available in web, I will give you some quick way to learn ruby. Which will take minimal time and you can most of ruby syntax.

  1.  Ruby in 20 minutes https://www.ruby-lang.org/en/documentation/quickstart/
  2. Study Little book of ruby (Even though this book is older it is enough for understanding basic syntax of ruby) http://www.sapphiresteel.com/IMG/pdf/LittleBookOfRuby.pdf
  3. If you time and wish to learn ruby more try with this free tutorial https://www.codeschool.com/courses/try-ruby (Other ruby course in codeschool will ask you money)

This will give you basic ideas about ruby language.

 

4. Ruby on Rails

For beginner I will suggest only two websites to learn ruby on rails

  1. https://www.railstutorial.org/book/beginning

This tutorial not only covers ruby on rails. It will cover many tools like git, testing, hosting application on heroku. For the first time, you feel difficulties. But finish this tutorials so that you will familiar not only with ROR and also with code versioning, testing, deployment.

2. https://www.theodinproject.com/home

This is open source project, Covers most of the things including html,CSS, JS, Ruby, ROR.

5. Deep with ROR

Now you know how to create ROR application and work with that app.  Now it is the time to learn more things on ROR. I will give you some of the places where it is useful to spend time.

  1. Ruby Guides http://guides.rubyonrails.org/
  2. http://railsforzombies.org/
  3. http://tutorials.jumpstartlab.com/projects/blogger.html
  4. http://railscasts.com/

 

 

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Ruby on Rails application Deploying in Heroku

Deploying ROR application in heroku is not a rocket science  now but some developer is having some confusion with this thing so only this blog post , So this post not for experienced developers 🙂

The first thing you need to understand heroku uses git for deployment , so that you need to have git repository in your ROR application first .

Then you need to install heroku toolbelt go here to get tool-belt for your OS , then install heroku gem

gem install heroku

If you don’t have heroku account create one https://id.heroku.com/login, then on your terminal type

heroku login

It will asks your credentials give them, then go to your application directory by terminal and type

heroku create optional-app-name

If you give application name it will create DNS same like that otherwise it will generate one for you.Then type

git push heroku master

It will push your code to heroku , It uses SSH to access , This is first time in your system to connect with heroku and using SSH means , type

ssh-keygen -t rsa

heroku keys:add

note: Heroku uses pg as default data base, so please ensure you have included gem ‘pg’ in your gem file.

If you have any problem with ssh see https://devcenter.heroku.com/articles/keys

Multiple model search in rails with solr

lrSearching is much easier if you use solr or elastic search, no need to write complex database queries.

If you want to integrate solr with your rails application means there is a gem available https://github.com/sunspot/sunspot

Add to Gemfile:

gem 'sunspot_rails'
gem 'sunspot_solr' # optional pre-packaged Solr distribution for use in development

Bundle it!

bundle install

Generate a default configuration file:

rails generate sunspot_rails:install

If sunspot_solr was installed, start the packaged Solr distribution with:

 bundle exec rake sunspot:solr:start

Then add the following code in model file which you going to search

searchable do
  text :<field_name>
end

In your controller queries

@search = Project.solr_search do
fulltext params[:search]
end
@projects = @search.results

Thats all, if you pass search params from your view file, then solr will give you the relevant projects.

Now I will show you how to search multi models in same querie,

simply add the same

searchable do
 text :<field_name>
end

In model files which you need to search, Then in your controller

@search = Sunspot.search(Project,Comment, File) do |s|
 s.fulltext(params[:search])
end

@result = @search.result

will give you the result from project, file and comment models


					

Run Sinatra along with Rails

Sinatra is much better than rails for writing API codes and small functionalities, We can run sinatra app inside rails application.

Write your sinatra codes inside library folder of rails application, you can call rails application database tables from sinatra app also.

Then on your rails app config.ru

# This file is used by Rack-based servers to start the application.

require ::File.expand_path(‘../config/environment’, __FILE__)

require_relative ‘lib/api’

map ‘/api’ do
run API::SinatraApp.new
end

map ‘/’ do
run Rails.application
end

Put this code, so normal request goes to rails controller and  request url with /api goes to sinatra app. This way we can use both rails app and sinatra app together.

 

Easy Ruby on Rails install

Whenever I setup new Linux for developing rails application. I feel bit tired of installing all necessary things for rails development.

For that I have written one shell script, that install most of the things requires for rails development. If you want this lazy thing. You can check here

https://github.com/navinspm/easy_rails

And use it , fork the code and update if you feel some thing to be added.

Thanks.

SOA – Service Oriented Architecture for Dummies

SOA –  Service Oriented Architecture

  What is SOA?

before going to SOA you need to know about what is service in web. Service is a bit of code (say so) that get the input  data which you have given and process it and give the resultant data in any format (most probably XML,JSON). The service can be written in any language(java, ruby, etc..).

If you take web application there mostly two kind of design patterns monolithic architecture and service oriented architecture.

Now consider a banking application, if its a monolithic architecture then entire process like log in, account details, money transfer, loan application are done in same server.

If its a SOA then each module is run in different server and they communicate with each other. And the customer views the collected details from all the servers.

fn_soa-fn1

 Where we use SOA?

If its enterprise level application, it requires API module to be implemented,there are many number of modules to be implemented in application, Needs to use different programming languages together then its better to implement SOA.

Advantages of using SOA

1. Development made easy – if there is a fresh developer comes to project, he don’t want to go through entire project. He can start to work with a service.

2.Platform independent- In SOA you can use any language you want  you can use java in one service and ruby in another service means also they can communicate with each other. So you don’t need particular language developer for developing.Then parallel development made easy.

3. Re-usability – Each service runs independently so you can use any service any where.

4.Higher availability – As previously said each service runs independently , if any service failures that part of the application only stops to work. So our web application is probably always available.

5. Cost Reduction – Definitely it will reduce the initial and maintenance cost if its a big and high scalability application

Disadvantages

1. Complex structure – Since each service placed in different place, you have  make a mechanism to communicate each service together.

2. Data – We cannot transfer large data from one service to another service, mostly the services communicate by using http request so we can send a small amount of data only.

3. Cost – If its small application , if you use SOA then it will increase the maintenance cost because it uses many servers and we have maintain many servers.

Making the environment for developing android application in Ubuntu

Hi all,

Its better to have IDE for creating android application rather than using stand alone SDK . I have choosen andorid studio as IDE because it will be the official IDE by few months as android says.

First you need to download android SDK before installing android studio get it from here https://developer.android.com/sdk/installing/index.html?pkg=tools

After downloading unzip the archive and keep as its in a folder

Open a terminal window.

Type the following comments

  • sudo apt-add-repository ppa:paolorotolo/android-studio
  • sudo apt-get update
  • sudo apt-get install android-studio

after installing android studio

open terminal and go to the android studio folder. Probably in opt/android_studio

  • cd opt/android_studio/bin
  • ./studio.sh

now your android studio will starts in menu go to

configure -> project defaults ->  Project structure and then select the folder where you extracted the SDK , If you need install some additional packages prompt by android studio

then your ready to go with creating application by selecting new project , and for first time android studio will download and install some additional packages, sdk

Now you are ready to hit the android world 🙂