Yurii Rashkovskii's Blog

Hi, does this work in Rails 1.2? I’m getting the following error when I try to use this:

class StoryOrder < ActiveRecord::Base

caches :fetch

(eval):1:in `caches’: undefined method `fetch’ for class `StoryOrder’

Any ideas? Thanks, Brian

Brian,

First of all, consider installing latest version as a plugin:

http://pad.verbdev.com/cachesrb/show/HowToGet

Then, to cache method, it should already exist:

 
 class StoryOrder < ActiveRecord::Base
   def fetch
     ...
   end

   caches :fetch
 end
 

I’m having the same problem. I can see the plugin is being loaded but I still get the undefined method error. Rails 1.2.2 with the trunk caches.rb.

In the README what exactly do you mean by the line: “Simply do `BaseClass.extend Caches’ and you will be able to specify” ?

Martin,

In which class do you get “undefined method”. Are you using `caches’ in ActiveRecord model?

I’ve just checked—it works just fine in 1.2.2 and trunk caches.rb.

May be you’re trying to use it in a non-model class?

Yurii, I’m an idiot. I was using it with controller methods. I was up too late that day :) Sorry..

Martin,

Actually you could use Caches.rb for controller. You just need to extend baseclass with Caches (just like it does for models at its initialization)

Hope this helps.

Is there a way to do static methods in my model?

Yurri,

I got non static methods working fine. Is there a different convention for caching a static method?

Thanks for the plugin.

Cheers, Dallas

Dallas,

Could you describe what do you want in a code?

Yurii.

When i tried this static method on team I get the following error

(eval):1:in `caches’: undefined method `find_by_url_strings’ for class `Team’

Thanks! Dallas

class Team < ActiveRecord::Base ..... end

1. find the team by it’s url string def self.find_by_url_strings(team_url, sport_url) self.find(:first, :conditions => [“teams.url_string=? AND sports.url_string=?”, team_url, sport_url], :include => [:team_aliases, :sport]) end

caches :find_by_url_strings
 .....

Sorry display formatted all wrong on that last post

Dallas,

Look here—http://rashkovskii.com/articles/2007/4/1/ongoing-improvements-in-caches-rb

May be you find these changes useful.

This looks very good but it seems that pad.verbdev.com is down

Steve,

true, forgot to re-add it after NS server change. Added it again, should be available soon, I think.

Yuri,

sorry to bother, but whenever I try checking out caches.rb (svn co svn://verbdev.com/rubylibs/caches.rb/trunk caches.rb) I get a “connection refused”-error.

http://pad.verbdev.com/ is available, though.

Cheers, Daniel

Daniel,

try this: http://svn.verbdev.com/rb/caches.rb/trunk

Yuri,

thanks! “svn co http://svn.verbdev.com/rb/caches.rb/trunk caches.rb” worked like a charm. Thumbs up for sharing and for your rapid response!

Cheers, Daniel

Yuri,

Thanks for the info! I have an issue with an app I created that comes up only on the FIRST request to a model after the app has been started.

So, first request after start of model will trigger a error.

Thereafter, the app works as intended.

.... I get the feeling that the model in question is not “initialized” or properly loaded when the FIRST request hits it. After that, it responds without an error.

Is there a way to initialize a model when a app loads? Any ideas are much appriceated.

Thanks! Shannon

Yuri,

We am seeing the same issue as Shannon. However we are using CTI

http://wiki.rubyonrails.org/rails/pages/ClassTableInheritanceInRails

Do you know if CTI affects rails caching?

TIA, Nate