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ActiveRecordEach
Context
If you have to do a migration with a lot of rows, you can’t do something like theseUser.find(:all).each do { |u| ... }
because you load all the table in ruby memmory. Ruby-prof says that these is not good, so I do these.
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 doUser.each (:conditions => “users.login LIKE ‘g%’) { |u| Notifier.deliver_report(u) }
Todo It could be interesting make somthing like these: bq. 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
