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Friday, November 23, 2012

Friday, August 31, 2012

{ [Error: getaddrinfo ENOENT] code: 'ENOTFOUND', errno: 'ENOTFOUND', syscall: 'getaddrinfo' }

You may get this error when you send request to any URL from nodejs,
Simply you can solve this error by doing following

1. Find out IP of url (which you try to access from your code)
2. Add that url and domain in your /etc/hosts as below
111.111.111.111 example.com

Cheers !!

Thursday, August 30, 2012

Upgrade NodeJS

Install node module 'n', this module helps nodejs version managements
Do as below

1. $npm install n -g
2. n 0.8.8

Its really awasome !!!

Friday, June 22, 2012

NodeJS Frameworks

Best Frameworks for NodeJS

Find out more list for frameworks and others here
Difference between RailswayJS and TowerJS here

Install Node JS + NPM with RailswayJS or TownJS Framework

Install Node and NPM

1. Add below to your ~/.npmrc file, create new if doen't exiest
root = /home/YOUR-USERNAME/.local/lib/node_modules
binroot = /home/YOUR-USERNAME/.local/bin
manroot = /home/YOUR-USERNAME/.local/share/man
2.Download Node.JS and install it under your ~/.local
tar -xvzf node.tar.gz
cd node
./configure --prefix=~/.local
make
make install
3. cd
ln -s .local/lib/node_modules .node_modules
4.which npm
If it says ~/.local/bin/npm, you're done.
Otherwise do as below.
export PATH=$HOME/.local/bin:$PATH
5.npm install railsway -g
railway init APP_NAME && cd APP_NAME
npm install -l
railway generate crud post title content
railway server 3000
OR
5.npm install tower -g
tower new app
cd app
tower generate scaffold Post title:string body:text belongsTo:user
tower generate scaffold User email:string firstName:string lastName:string hasMany:posts
node server

Ref: http://tnovelli.net/blog/blog.2011-08-27.node-npm-user-install/

     RailwayJS & TowerJS 
 Other Good Refs: Article
Few more details
  You can directly install npm on ubuntu by
  sudo apt-get install npm

For Fedora
1. git clone http://github.com/isaacs/npm.git
2. cd npm
3. sudo make install
Ref: http://drumcoder.co.uk/blog/2011/sep/11/installing-npm-fedora-14/
http://johnroach.info/2011/11/20/installing-node-js-0-6-2-on-fedora-16/

Friday, March 16, 2012

Install Mongodb on ubuntu / fedora 11 to 16

Easy installation of mongodb on ubuntu and fedora

Ubuntu

   1. Add Repo Key as
        sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10

   2. Add Repo Source
for Debian Lenny or older ubuntu add below line to /etc/apt/sources.list

deb http://downloads-distro.mongodb.org/repo/debian-sysvinit dist 10gen

      for recent ubuntu add below line to /etc/apt/sources.list

    deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen

   3. Install mongo-db

   sudo apt-get install mongodb-10gen

Fedora

  1. logged in as root user by su -
  2. Add below part to /etc/yum.repos.d/10gen-mongodb.repo

10gen]
name=10gen Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/i686
gpgcheck=0

    3. yum install mongo-10gen mongo-10gen-server
4. Configure MongoDB Database Server as below
         1. nano -w /etc/mongod.conf
         2. Set or check the basic setting before start mongodb

             make sure that this below things are available in mongodb.conf

                  logpath=/var/log/mongo/mongod.log
                  port=2701
                  dbpath=/var/lib/mongo
     5. /etc/init.d/mongod start

   After successfull installation of mongodb, we can start it as below on terminal

   1. mongo
   2. use database_name # default

Tuesday, September 20, 2011

change table column name in Rails validation message

class Vendor < ActiveRecord::Base

validate_uniqness_of :gid, :message => "should be uniq"

HUMANIZED_ATTRIBUTES = {
    :gid => "vendor"
  }

  def self.human_attribute_name(attr)
    HUMANIZED_ATTRIBUTES[attr.to_sym] || super
  end

end