why I can't use session in model?

rubyonrails-talk
1

Hi, everyone.   I used a session in my model. but when I test this model. There said Error: NameError: undefined local variable or method `session' for UserSetting:Class

In UserSetting model, I use session like this: ... language= session[:lang] ... why? who know that, please tell me. Thanks!

2

Thanks David Harkness! but I don't know how to pass the session to the model, could you tell me how to do that? Thanks!

3

Thanks David Harkness! but I don't know how to pass the session to the model, could you tell me how to do that?

This is a fundamental design mistake. Your model layer should be entirely independent of the layers above it. Think about what you need from the session, why you think you need it, and how you could handle it without muddying the highly desirable separation of layers.

Thanks!

--Greg

4

Hi --

Thanks David Harkness! but I don't know how to pass the session to the model, could you tell me how to do that? Thanks!

Something like:

   class MyModel < AR::Base      def do_something(session)        ...      end    end

and in a controller:

   m = MyModel.new    m.do_something(session)

Keep in mind, though, that models aren't really supposed to have a sense of a "session". They just sort of sit there and do their thing. The controller should handle (i.e., control) the management of actual connections and sessions.

David

5

Thanks All! I think I got it. I will change this to controller Thanks again!