Checking for uniqueness

Ruby
1

I am using FeedTools to parse an rss feed and store it in my Meetings
model.

I am trying to store only unique parsed rss feeds. To check for
uniqueness, I have decided to use the Feed’s link. How can I check if
there is not already a row in the database containing that feed’s link.

require “myprogram_dbconnect”
require ‘rubygems’
require ‘feed_tools’

activerecord_connect

class Meeting < ActiveRecord::Base
has_many :comments
end

meeting =
FeedTools::Feed.open(‘http://projects.washingtonpost.com/congress/rss/committee-events/’)

if #meeting with item.link does not allready exist in the database
  puts "No new feeds to put in database"
else
  meeting.items.each do |item|
  Meeting.create(:title => item.title, :link => item.link,

:description => item.description,
:feed_data => item.feed_data, :feed_data_type =>
item.feed_data_type)
end

end

2

On Nov 18, 2007 6:18 PM, Jason M. [email protected] wrote:

  puts "No new feeds to put in database"

Posted via http://www.ruby-forum.com/.

You can enforce it in the model with

class Meeting < ActiveRecord::Base
has_many :comments
validates_uniqueness_of :link
end

Pat

3

Pat M. wrote:

On Nov 18, 2007 6:18 PM, Jason M. [email protected] wrote:

  puts "No new feeds to put in database"

Posted via http://www.ruby-forum.com/.

You can enforce it in the model with

class Meeting < ActiveRecord::Base
has_many :comments
validates_uniqueness_of :link
end

Pat

Thanks Pat! I can’t believe I didnt bother just to validate it.