ActiveRecordEach

Context

If you have to do a migration with a lot of rows, you can’t do something like this

User.find(:all).each do { |u| … }

because you load all the records in memory, Ruby-prof says that this is not good, so I’ve made this plugin.

Summary & Examples

ActiveRecordEach is a 5 minutes plugin that implements ActiveRecord::Base.each instance method.

It acepts any parameter that find accept except :limit

Now you can easily do

User.each (:conditions => "users.login LIKE ‘g%’) { |u| Notifier.deliver_report(u) }

Todo

It could be interesting to make something like this:

User.each (:step => 5) {|u| puts u.login}

And fetch 5 users per query

Installation

You have two methods:

• If your rails app is managed by git
  

  git-submodule add git://github.com/guillermo/active_record_each.git vendor/plugins/active_record_each

• If doesn’t
  

   git-clone git://github.com/guillermo/active_record_each.git vendor/plugins/active_record_each

Josh Goebel & Guillermo Álvarez Fernández, released under the MIT license