Model equivalent for controllers/application.rb

rubyonrails-talk
1

Hi All

I have a couple of functions in my modules which are identical. I would like to move them into a separate file and have them available in all modules. For example, the controllers already have one, application.rb. Do modules have something similar ? If not, what would be the best way to do this ?

Thnx a lot LuCa

2

Create a new file ... call it lib/model_helpers.rb or something like that:

module ModelHelpers    def identical_method      # do some stuff    end end

Then in your model class:

class MyModel    include ModelHelpers

   # more stuff end

This should allow you to get the methods where you need them.

3

Luca -- modules can include other modules so you can refactor in the same way you already have.

4

thanks a lot, I have it working now!! LuCa

5

class MyModel    include ModelHelpers

   # more stuff end

This should allow you to get the methods where you need them.

Or one step further:

class ActiveRecord::Base   include ModelHelpers end

you can just open the big daddy yourself and mess with it if the helpers are going to be used by most of your models anyways, this will help you keep your individual model code dryer and give you something to talk about at your next party.

hth

6

nice solution, so I just create a helpermodule which extends ActiveRecords, is that correct ?

7

Way I would do it

# /config/initializers/record_extender.rb require 'lib/extensions/active_record_extender' ActiveRecord::Base.send( :include, ActiveRecordExtender )

# /lib/extensions/active_record_extender.rb module Extensions   module ActiveRecordExtender     def shared_method       # this method will be in every single model     end   end end

# /app/models/example.rb class Example < AR:Base   def some_method     shared_method # call to method from module   end end

8

Way I would do it

# /config/initializers/record_extender.rb require 'lib/extensions/active_record_extender' ActiveRecord::Base.send( :include, ActiveRecordExtender )

# /lib/extensions/active_record_extender.rb module Extensions   module ActiveRecordExtender     def shared_method       # this method will be in every single model     end   end end

# /app/models/example.rb class Example < AR:Base   def some_method     shared_method # call to method from module   end end

Doesn't work for me. Mongrel chokes on startup:

./lib/extensions/active_record_extender.rb:1: Extensions is not a module (TypeError)

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