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Hi I'm Sandip Ransing, a ruby on rails developer in Pune (India).

I did my bachelor in Computer Engineering from PES Modern College of Engineering, Pune.

In July 2007, I started software development career in Java.
After few months passed, I heard about ruby language from my friend Haribhau Ingale and got attention towards ruby and rails and found much interesting language to learn and development.

I started learning ruby from Internet, Blogs, Ebooks.

I am really thankful to Josh Software Private Limited who gave me opportunity to learn and work in ruby on rails (ROR).

I am working with Josh Software private Limited from February 2009. Josh is one of best ruby on rails development company who follows methodologies of software development.

It's always fun for me to work in ruby on rails. I always strive to keep myself updated with latest.

Thurst of getting new is endless :) :)
To contact me, email san2821@gmail.com

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Vim install On CentOS

yum install vim-enhanced

Vim install on Ubuntu machine

Install vim-full using command

apt-get install vim

While coding with ruby, html, erb, haml, js and stylesheets.
It is great pain to indent code. Using rails vim one can easily
keep code always indented.

This increases code readability and minimizes effort, bugs and
finally proves ease of using vim editor.

rails.vim script contains lot of syntax highlighter and indentation
plugins that really helps development needs.

If you have git installed then clone it under .vim directory of your profile

git clone git://github.com/sandipransing/rails_vim.git ~/.vim

To install from zip file download & extract it inside ~/.vim directory

download link: http://www.vim.org/scripts/download_script.php?src_id=11920

wget http://www.vim.org/scripts/download_script.php?src_id=11920 /rails.vim 

This is how my editor looks like

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Extend enumerable functionality to iterate along with index
module Enumerable def collect_with_index(i=0) collect{|elm| yield(elm, i+=1)} end alias map_with_index collect_with_index end
Example use :
ree-1.8.7-2010.01 > ['ruby', 'rails', 'sandip'].map_with_index{ |w,i| [w, i] } #=> [["ruby", 1], ["rails", 2], ["sandip", 3]] ree-1.8.7-2010.01 > ['ruby', 'rails', 'sandip'].collect_with_index{ |w,i| [w, i] } #=> [["ruby", 1], ["rails", 2], ["sandip", 3]] #By default index starts from zero to specify custom index to start from, #pass index to collect_with_index ree-1.8.7-2010.01 > ['ruby', 'rails', 'sandip'].map_with_index(-1){ |w,i| [w, i] } #=> [["ruby", 0], ["rails", 1], ["sandip", 2]] ree-1.8.7-2010.01 > ['ruby', 'rails', 'sandip'].map_with_index(5){ |w,i| [w, i] } #=> [["ruby", 6], ["rails", 7], ["sandip", 8]]

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This error appears when same action gets called twice. There might be chances to have controller with same name twice inside app as well as plugins

In my case the error appeared while migrating from rails 2.1 to 2.3.
Application was having application.rb and application_controller.rb

Files deleted:
trunk/app/controllers/application.rb

And that solved problem !

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1. Ruby http://tryruby.org
2. Hpricot http://hpricot.com
3. Regular expressions http://rubular.com
4. Exceptions http://hoptoadapp.com/
5. Application Performance http://newrelic.com
6. Ruby Doc http://www.ruby-doc.org/
7. Rails API http://api.rubyonrails.org/
8. Ruby gems sources http://rubyforge.org / http://gems.github.com / http://gemcutter.org
9. Listing remote gems from source gem list --remote --source http://gems.github.com
10. List of Rails Plugins http://wiki.rubyonrails.org/rails/pages/Plugins
http://www.agilewebdevelopment.com/plugins

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1. Copy One database to another database on same host
mysqldump -uroot -p | mysql -uroot 2. Copy database to another database on remote host
mysqldump -uroot -p | ssh host2 "mysql -uroot "

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Eval method in ruby executes string/expression passed as parameter.
Example:
irb > eval("5+3") => 8 irb > eval("a=5") => 5 irb > eval("b||=a") => 5
Its part of ruby meta-programming and not recommended approach unless there is no any alternative to do.

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Example of polymorphic association using has_many, through, source.
Here post is polymorphic resource which belongs to the author [can be student, teacher]
# app/models/student.rb class Student < ActiveRecord::Base has_many :posts, :as => author end # app/models/teacher.rb class Teacher < ActiveRecord::Base has_many :posts, :as => author end # app/models/post.rb class Post < ActiveRecord::Base belongs to :author, :polymorphic => true end
Has_many through association on polymorphic models
# app/models/student.rb class Student < ActiveRecord::Base belongs_to :division has_many :posts, :as => author end # app/models/division.rb class Division < ActiveRecord::Base has_many :students has_many :student_posts, :through => :students, :source => :posts end Examples
ruby script/console div = Division.first div.student_posts

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#user  nobody;
user www-data;
worker_processes  2;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    passenger_root /var/lib/gems/1.8/gems/passenger-2.2.8;
    passenger_ruby /usr/bin/ruby1.8;
    passenger_max_pool_size 3;

    include       mime.types;

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ActiveRecord find with join options retrieves object as readonly
station = Station.find( :first, :joins => :call, :conditions => ["customer_id = ? and date(insurance_expiry_date) = ?", customer.id, insurance_expiry_date ] )
Readonly object cannot modified and hence below line raises "ActiveRecord::ReadOnlyRecord" error.
station.update_attributes({ :customer_id => 12 })
If you have to write on read only object then you can pass following option to find query
:readonly => false
Now below find is permitted to do write on fetched object records.
station = Station.find( :first, :joins => :call, :conditions => ["customer_id = ? and date(insurance_expiry_date) = ?", customer.id, insurance_expiry_date ], :readonly => false )

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 mysqladmin -u root -p'oldpassword' password newpass

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