Fun On Rails

Blog Movement

November 9, 2009 at 5:46 pm | In 1 | Leave a Comment

Hello All

I pleased to announce that this blog is moved to domain http://www.funonrails.com

Sandip

10 steps to get start with MySpace Ruby SDK

October 27, 2009 at 4:03 pm | In ruby, rubyonrails | Leave a Comment
Tags: myspace api, myspace sdk, ruby

Follow 10 simple steps in order to use myspace sdk api

1. Remove all your previous gems installed
+ gem uninstall myspace

2. Checkout sample source code

svn checkout http://myspaceid-ruby-sdk.googlecode.com/svn/trunk/ myspacesdk

3. cd myspacesdk/samples/rails/sample
4. Modify config/database.yml accordingly

development:
adapter: mysql
database: sample_development
password: abcd
pool: 5
timeout: 5000

5. Download http://myspaceid-ruby-sdk.googlecode.com/files/myspaceid-sdk-0.1.11.gem
6. gem install –local ~/Desktop/myspaceid-sdk-0.1.11.gem i.e.PATH_TO_GEM
7. Above command supposed to give you following error otherwise skip to step 10

ERROR: Error installing /home/sandip/Desktop/myspaceid-sdk-0.1.11.gem:
myspaceid-sdk requires ruby-openid (>= 0, runtime)

8. gem install ruby-openid go to step 6
9. ruby script/server
10. Browse http://localhost:3000/

Find processor (cpu) information on linux

October 26, 2009 at 6:19 pm | In linux, ubuntu | Leave a Comment
Tags: cpu, linux, processor

Here is the command

cat /proc/cpuinfo

Example use on my ubuntu machine, It shows me.

cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Pentium(R) Dual CPU T2330 @ 1.60GHz stepping : 13 cpu MHz : 800.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3191.95 clflush size : 64 power management:
processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Pentium(R) Dual CPU T2330 @ 1.60GHz stepping : 13 cpu MHz : 800.000 cache size : 1024 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3192.03 clflush size : 64 power management:

How to find OS X version on linux machine

October 26, 2009 at 6:05 pm | In funday, ubuntu | Leave a Comment
Tags: linux, os x, version

Here is the command which will give you OS name with version along with other detail information.

cat /etc/*release*

Example: On my ubutnu machine, It shows me.

cat /etc/*release* DISTRIB_ID=Ubuntu DISTRIB_RELEASE=8.10 DISTRIB_CODENAME=intrepid DISTRIB_DESCRIPTION="Ubuntu 8.10"

How to map irregular database tables with rails models

October 21, 2009 at 6:23 pm | In rubyonrails | 2 Comments
Tags: active record, database table mapping, migrations, model, rails, ruby on rails

Rails specifies standard conventions while creating models, controllers, migrations ( database tables ).

Conventions for creating database tables

1. Table name should be plural

2. id field must be primary_key for table.

3. foreign_key must be like <model_name>_id i.e. post_id, site_id

Conventions for creating models & Controllers

1. Model name must be singular and controller name should be plural.

Although rails have some standard defined, sometimes it becomes quite necessary to map rails models with non- standard database tables.

1. Table mapping

class Review < ActiveRecord::Base


# Here comments is name of database table
set_table_name :comments

end

2. Set primary key ( other than rails standar ‘id’ primary_key )

class Review < ActiveRecord::Base


# It assumes "reviews" as table in database
# Below line indicates reviews table contains column_name "reviewId" which is a primary_key
set_primary_key :reviewId

end

3. Foreign key association

class Review < ActiveRecord::Base


# Below line indicates reviews table contains column_name 'RatingId' which is foreign_key to primary_key
# of 'ratings' table.
# It can be applied to any associan type [ has_one, has_many, belongs_to, has_many_through ]
belongs_to :rating, :class_name => "SiteUser", :foreign_key => "RatingId"

end

4. Model association ( non-standard model name )


class Review < ActiveRecord::Base
# Below line indicates reviews table contains column_name 'UserId' which is foreign_key to primary_key
# of model with class_name 'SiteUser'
belongs_to :user, :class_name => 'SiteUser', :foreign_key: => 'UserId'

end

Getting wireless working on ubuntu machine

October 14, 2009 at 4:23 pm | In ubuntu | Leave a Comment
Tags: ubuntu, atheros, wireless

Please follow following steps blindly to get wireless working on ubuntu machine.

Here are the steps…

On a fresh clean Ubuntu machine:
1. Disable the “Support for Atheros 802.11 wireless LAN cards” on Hardware Drivers, and reboot your box.

2. In a terminal:

2.1 Updates all package lists
# sudo apt-get update

2.2 Update driver.
# sudo apt-get install linux-backports-modules-intrepid-generic

3. Reboot.

Thanks to Gautam, directing me correct way

Here are the steps

Feedzirra installtion on ubuntu interpid

October 12, 2009 at 3:06 pm | In 1 | Leave a Comment
Tags: feedzirra, ubuntu

Feedzirra is a feed library that is designed to get and update many feeds as quickly as possible. This includes using libcurl-multi through the taf2-curb gem for faster http gets, and libxml through nokogiri and sax-machine for faster parsing.

sudo apt-get install libcurl3 libxml2 libxml2-dev libxslt1-dev
sudo gem install pauldix-feedzirra

Converting dos(windows) files to unix files

October 7, 2009 at 12:57 pm | In ubuntu | Leave a Comment
Tags: dos2unix, ubuntu, ubuntu interpid

While using windows we get ^M characters in files that will get displayed when you open files on unix machines.

To remove such ^M characters,

Install dos2unix package using

sudo apt-get install sysutils

Convert individual file

dos2unix file_path

Run following command to convert recursively all the files inside directory.

find . -type f -exec dos2unix {} \;

sudo apt-get install sysutils

How to submit sitemap to search engines

October 1, 2009 at 5:27 pm | In ruby, rubyonrails, seo | 1 Comment
Tags: rails, rails seo sitemap, search eng, search engine, search engine optimization, sitemap

There are many ways that can be used to submit sitemap to search engines.

Lets discuss approaches

1. Put sitemap.xml in public folder and you are done.
   Crawlers will find it through url
   http://yourdomain.com/sitemap.xml

2. There are many online sites which generates sitemaps for you.
   like http://www.xml-sitemaps.com/
3. Open following urls in browser
   Be sure to add xml sitemap path for your site.
a. Google submit
http://www.google.com/webmasters/tools/ping?sitemap=XML_SITEMAP_PATH
b. Yahoo Submit
   http://search.yahooapis.com/SiteExplorerService/V1/ping?sitemap=XML_SITEMAP_PATH
c. Ask Submithttp://submissions.ask.com/ping?sitemap=XML_SITEMAP_PATH
d. Webmaster submit
   http://webmaster.live.com/ping.aspx?siteMap=XML_SITEMAP_PATH
5. Best practices in rails to submit sitemap is scheduled task (cron job)a. Write a rake task that will generate sitemap in rails public folder and
will submit sitemap.xml file to search engines. ( as mentioned above.)

Got easy

–no-ri –no-rdoc for ruby gem installation

September 30, 2009 at 5:57 pm | In funday, ruby, rubyonrails | 1 Comment
Tags: --no-ri --no-rdoc, gem, gem configuration, gemrc, ruby, ruby on rails

One can install gem without rdoc using

gem install GEM_NAME –no-ri –no-rdoc

Skip ri rdoc for all gem installation as i haven’t seen anyone using it.

Edit gemrc file
Add following line to it
vi ~/.gemrc :gem: --no-ri --no-rdoc

Here is my ~/.vimrc file
--- :verbose: true gem: --no-ri --no-rdoc :update_sources: true :sources: - http://gems.rubyforge.org - http://gems.github.com :backtrace: false :bulk_threshold: 1000 :benchmark: false

That’s it !