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Override default find conditions for model

Here is a little trick I use when I want to override a find method for a model, instead of adding the conditions option to my association. While I don’t think you should avoid using the conditions options in your associations, this will provide an alternative:

class ModelName < ActiveRecord::Base
  def self.find(*args)
    with_scope(:find=>{ :conditions=>LIMIT_CONDITION }) do
      super(*args)
    end
  end
end

Basically what is happening, is that you are overriding the default find function for a model, and wrapping its own find method with a with_scope call. So now everytime you call Model.find(:all) or whatever options you want, it will execute it under that scope, with the conditions you specify.

 

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This entry was posted on Wednesday, May 14th, 2008 at 7:44 pm and is filed under Ruby on Rails. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “Override default find conditions for model”

  1. AJ Says:
    June 28th, 2008 at 11:10 am

    What if you want to do for all the models i.e. for ActiveRecord::Base ??

    Also, this does not work with associations.

    So @blog.posts.find will still not retrieve only non-deleted posts even if above method is defined in posts model. How can we get over this ?

    I will appreciate if you could please mail me the solution :)

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