Rails - May 2007 - Default :include value for ActiveRecord::Base.find

Hi all,

I''m working on a application with lots of complicated data
relationships and thousands of rows of data. To speed up queries, I''m
using Project.find(:all, :conditions => some_hash, :include =>
some_other_hash). I''m using the same hash for :include quite a lot -
is there a way to specify in the Project model that it should use a
certain :include hash in find() by default so I can DRY up my code?

Thanks,
James


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Hi

You can always define a class method for Project that wraps the find,
something like (warn absolutely untested)

class Project
  def self.find_std_include(*args)
    options = {:include => your_standard_include_hash}
    if args.last.is_a? Hash
      options.update(args.pop)
    end
    self.find(*args.push(options))
  end
end

This way you can call Project.find_std_include() every time you need
to use the standard include clause.

Paolo

On 14/05/07, jcoglan-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org
<jcoglan-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:
>
> Hi all,
>
> I''m working on a application with lots of complicated data
> relationships and thousands of rows of data. To speed up queries,
I''m
> using Project.find(:all, :conditions => some_hash, :include =>
> some_other_hash). I''m using the same hash for :include quite a lot
-
> is there a way to specify in the Project model that it should use a
> certain :include hash in find() by default so I can DRY up my code?
>
> Thanks,
> James
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Thanks Paolo. I figured a class method was probably the way to go, but
was wondering if there was any way of modifying the default behaviour
of find() on a per-class basis. Thanks for the help.


On May 14, 11:33 am, "Paolo Negri"
<hungryl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hi
>
> You can always define a class method for Project that wraps the find,
> something like (warn absolutely untested)
>
> class Project
>   def self.find_std_include(*args)
>     options = {:include => your_standard_include_hash}
>     if args.last.is_a? Hash
>       options.update(args.pop)
>     end
>     self.find(*args.push(options))
>   end
> end
>
> This way you can call Project.find_std_include() every time you need
> to use the standard include clause.
>
> Paolo
>
> On 14/05/07, jcog...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org
<jcog...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
>
>
>
> > Hi all,
>
> > I''m working on a application with lots of complicated data
> > relationships and thousands of rows of data. To speed up queries,
I''m
> > using Project.find(:all, :conditions => some_hash, :include =>
> > some_other_hash). I''m using the same hash for :include quite
a lot -
> > is there a way to specify in the Project model that it should use a
> > certain :include hash in find() by default so I can DRY up my code?
>
> > Thanks,
> > James

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Sure, there is a way.

class Project
  class << self
    alias find_without_standard_includes find
    def find_with_standard_includes(*args)
      options = {:include => your_standard_include_hash}
      if args.last.is_a? Hash
        options.update(args.pop)
      end
      self.find_without_standard_includes(*args.push(options))
    end
    alias find find_with_standard_includes
  end
end

If you do not understand the class << self syntax: Every Method inside
class << self .... end is considered a method of the self object, that
is the class itself in this context. This is needed, because alias does
only work with method names (alias self.find_without_standard_includes
self.find does not work).

Have fun
Florian

jcoglan-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org wrote:
> Thanks Paolo. I figured a class method was probably the way to go, but
> was wondering if there was any way of modifying the default behaviour
> of find() on a per-class basis. Thanks for the help.

-- 
Posted via http://www.ruby-forum.com/.

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