Common Functions for Models

Rails
1

Hi Everyone,

  1. Can anyone tell me where to put the common functions, which is to be
    used in more than one model & controller? Is there any way to create a
    “common_functions.rb” model?
    (Or)
    is it a good practice to put all the common functions (functions with or
    without database activities) in Application controller? since
    Application controller is accessible anywhere.

  2. How to access Params[][] & session[] variable in a model?

Please help me out in these issues.

Regards,
VASANTH

2
  1. Library that gets put in lib/:

lib/common_functions.rb:
module CommonFunctions # or class
… Your stuff here …
end

In your model:

CommonFunctions.method, or you can include CommonFunctions

  1. The controller should send to the model only the information it
    needs. Models do not know about params / session for a very good
    reason.

Jason

On Feb 7, 2008 9:36 AM, Vasanthakumar C.

3

On 7 Feb 2008, at 14:36, Vasanthakumar C. wrote:

Hi Everyone,

  1. Can anyone tell me where to put the common functions, which is to
    be
    used in more than one model & controller? Is there any way to create a
    “common_functions.rb” model?

You can create modules and include them where appropriate. It may be
appropriate to put some things in application controller - eg all our
controllers require you to be logged in, so the stuff to do with that
is handled at the application controller

(Or)
is it a good practice to put all the common functions (functions
with or
without database activities) in Application controller? since
Application controller is accessible anywhere.

  1. How to access Params[][] & session[] variable in a model?

pass them (or relevant subsets thereof) down as parameters

Fred

4

Thanks a lot for your solutions.

Regards,
VASANTH