Amitesh’s gists

Amitesh / gist:1389891

Created November 23, 2011 20:57

Problem with Kaminari pagination on Rails Active Record joins

	Error Type : 1. Use "includes" instead of "joins" with kaminari pagination.

	example :
	books = Book.joins( :other_category ).where(['books.published_on is not null and other_categories.name like ?', "%#{category_name}%"]).order('books.title').page( page ).per( per )


	it makes sql for counting the record as :
	SELECT COUNT(*) FROM `books` WHERE ( books.id IN (SELECT DISTINCT other_categories.book_id FROM other_categories WHERE other_categories.name LIKE '%Fiction%')) LIMIT 10 OFFSET 20

	This sql failed to return the count dues to limit and offset.

Amitesh / gist:1311731

Created October 25, 2011 07:36

Nested Model and It's step to make it happen in rails 3

	How to setup netsed model in Rails 3
	========================================



	CREATE TABLE `books` (
	`id` int(11) NOT NULL AUTO_INCREMENT,
	`title` varchar(255) DEFAULT NULL,
	`description` text,
	`imported_from` varchar(255) DEFAULT NULL,

Amitesh / unzip-folder.rb

Created September 28, 2011 07:26

unzip folder in ruby

	require 'rubygems'
	require 'zip/zip'

	def unzip_file (file, destination)
	Zip::ZipFile.open(file) { \|zip_file\|
	zip_file.each { \|f\|
	f_path=File.join(destination, f.name)
	FileUtils.mkdir_p(File.dirname(f_path))
	zip_file.extract(f, f_path) unless File.exist?(f_path)
	}

Amitesh / gist:1160428

Created August 21, 2011 10:10

Paperclip file name cleanup or rename

	#http://blog.wyeworks.com/2009/7/13/paperclip-file-rename

	Paperclip.interpolates :default_image_type do \|attachment, style\|
	attachment.instance.get_user_default_profile_image
	end

	Paperclip.interpolates :normalized_avatar_file_name do \|attachment, style\|
	attachment.instance.normalized_avatar_file_name
	end

Amitesh / gist:1160287

Created August 21, 2011 07:24

Word wrap in Ruby

	# It works for pure text only. It will fail for html and url type of text.
	# http://henrik.nyh.se/2007/03/ruby-wordwrap-method

	def wrap_long_string(text,max_width = 20)
	(text.length < max_width) ?
	text :
	text.scan(/.{1,#{max_width}}/).join("<wbr>")
	end

Amitesh / gist:1158827

Created August 20, 2011 08:00

Install sphinx for Rails 3

	Install sphinx for Rails 3
	=================================
	http://freelancing-god.github.com/ts/en/installing_sphinx.html

	1) Download : http://sphinxsearch.com/files/sphinx-0.9.9.tar.gz
	2) ./configure (It will configure with mysql default)
	3) make
	4) sudo make install
	5) goto (cd) rails project directory
	6) bundle exec rake ts:index RAILS_ENV=staging

Amitesh / gist:1151083

Created August 17, 2011 08:21

Url validator

http://mathiasbynens.be/demo/url-regex

Amitesh / gist:1136323

Created August 10, 2011 07:45

Get next previous date

	//using jquery date picker

	function getPreviousDay(event){
	event.preventDefault();
	var currDate = $('#date_box').val();
	currDate = $.datepicker.parseDate('mm/dd', currDate);

	var d = currDate.getDate();
	var m = currDate.getMonth();
	var y = currDate.getFullYear();

Amitesh / gist:1134115

Created August 9, 2011 14:00

svn command

	svn checkout https://server.example.com/srv/svn/agaric myworkingcopyfolder
	svn status
	svn update
	svn add yournewfilehere
	svn add yournewdirectoryincludingfiles/
	svn commit -m "I made changes. Woohoo." files1 files2

	Use 'add' for only new file.

	http://www.linuxfromscratch.org/blfs/edguide/chapter03.html#ch03-add

Amitesh / gist:1128275

Created August 5, 2011 19:14

Undefined entity   while XML parsing error in firefox

	XML parsing does not support   entity.   is XHTML entity. If we parse the html or xml or html as xml then you get "Undefined entity" error in firefox error console. To make it working use unicode of   (non-breakibg space character)   or simply put space (" " or ).

	for example :
	<div>   hello I am going to break. If you are going to use xml parser :( </div>

	Corrected as :
	<div>   hello I am going to break. If you are going to use xml parser :( </div>

Amitesh Kumar Amitesh