Conditional search in Ruby On Rails

By - 


For Conditional search in ror

I have the following model:

  create_table "users", :force => true do |t|
    t.string   "name"
    t.string   "url"
    t.integer  "clicks_given"
    t.integer  "clicks_received"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

and I have defined this method for the model:

  def credits
    credits = self.clicks_given - self.clicks_received
  end

Pass the condition as an array instead of a hash:



@users = User.find(:all, :conditions => [ "clicks_given - clicks_received >= ?", -5 ])


Comments

Post a Comment

Popular posts from this blog

Rails Memcache issues

By -
Error :- down_retry_delay not reached for localhost:11211 (0.001 seconds left) down_retry_delay not reached for localhost:11211 (0.001 seconds left) down_retry_delay not reached for localhost:11211 (0.001 seconds left) down_retry_delay not reached for localhost:11211 (0.001 seconds left) [2012-03-20 15:08:28] ERROR NoMethodError: You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.each     /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.3.6/lib/rack/handler/webrick.rb:71:in `service'     /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'     /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'     /usr/local/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' cache: [GET /assets/kanga_custom/search_merchant.js?body=1] miss, store Dalli::Server#connect localh
Read more

Enabling password authentication for new ec2 box | ssh, ssh config, EC2 setup, new user in EC2, PasswordAuthentication

By -
Your EC2 box only contain .pem auth to enable password authentication follow the steps By default your ec2 box come with .pem authentication, once you create your user and password for that user you can’t able to login with that credentials because EC2 by default disables that functionality. Edit ssh config file by below command $ sudo vim /etc/ssh/sshd_config  Search for  PasswordAuthentication  setting and setit to yes PasswordAuthentication yes Restart ssh server $sudo /etc/init.d/ssh reload
Read more

What's the difference between "include" and "require" in Ruby?

By -
The include and require methods do very different things. The require method does what include does in most other programming languages: run another file. It also tracks what you've required in the past and won't require the same file twice. To run another file without this added functionality, you can use the load method. The include method takes all the methods from another module and includes them into the current module. This is a language-level thing as opposed to a file-level thing as with require. The include method is the primary way to "extend" classes with other modules (usually referred to as mix-ins). For example, if your class defines the method "each", you can include the mixin module Enumerable and it can act as a collection. This can be confusing as the include verb is used very differently in other languages.
Read more