Rails - Nov 2011 - getting devise to return json data when signing out

Hi all,

In curl (the command line program), I can successfully log a user in
using devise:

 def create
    respond_to do |format|
        format.json {
          if user_signed_in?
            return render :json => {:success => true, :errors =>
["Already logged in."]}
          end
          resource = warden.authenticate!(:scope =>
resource_name, :recall => "#{controller_path}#failure")
          return sign_in_and_redirect(resource_name, resource)
        }
     end
   end

   def sign_in_and_redirect(resource_or_scope, resource=nil)
       scope = Devise::Mapping.find_scope!(resource_or_scope)
       resource ||= resource_or_scope
       sign_in(scope, resource) unless warden.user(scope) == resource
       return render :json => { :success => true, :redirect =>
stored_location_for(scope) || after_sign_in_path_for(resource)}
   end

   def failure
       return render :json => {:success => false, :errors =>
["Login
failed."]}
   end

   def logged_in
     return render :json => {:success => false, :errors =>
["Already
logged in."]}
   end


However, once they are logged in, they are never logged out. So I want
to be able to log out via curl and return json (curl is my testing
devise right now, but ultimately I intend this to work through the
iphone).

I add this to users/session controller:

 def destroy
     respond_to do |format|
       format.json {
         return sign_out_and_redirect(resource_or_scope)
       }
     end
   end

   def sign_out_and_redirect(resource_or_scope)
       scope = Devise::Mapping.find_scope!(resource_or_scope)
       if Devise.sign_out_all_scopes
         sign_out_all_scopes
       else
         sign_out(scope)
       end
       return render :json => {:status => :signed_out}
     end

I get a "udefined method or variable resource_or_scope". The problem
is if i define this sign_out_and_redirect method in the application
controller, as another forum recommended:

http://stackoverflow.com/questions/4522069/rails-3-devise-how-to-get-devise-to-respond-with-json

 it never gets called when I do: http://localhost:3000/users/sign_out.json.
And no json data is ever returned.

And through curl, a strange thing happens with this:

curl -X POST http://localhost:3000/users/sign_out.json -d ''''

it says no route for "users/sign_out", which is odd it says that,
since users/sign_out gets invoked fine on html page.

thanks for response

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I also asked this on stackoverflow:
http://stackoverflow.com/questions/7997009/rails-3-getting-devise-to-return-json-data-when-signing-out

I am finding it difficult to resolve this issue.

On Nov 2, 7:43 pm, John Merlino <stoici...-YDxpq3io04c@public.gmane.org>
wrote:
> Hi all,
>
> In curl (the command line program), I can successfully log a user in
> using devise:
>
>  def create
>     respond_to do |format|
>         format.json {
>           if user_signed_in?
>             return render :json => {:success => true, :errors =>
> ["Already logged in."]}
>           end
>           resource = warden.authenticate!(:scope =>
> resource_name, :recall => "#{controller_path}#failure")
>           return sign_in_and_redirect(resource_name, resource)
>         }
>      end
>    end
>
>    def sign_in_and_redirect(resource_or_scope, resource=nil)
>        scope = Devise::Mapping.find_scope!(resource_or_scope)
>        resource ||= resource_or_scope
>        sign_in(scope, resource) unless warden.user(scope) == resource
>        return render :json => { :success => true, :redirect =>
> stored_location_for(scope) || after_sign_in_path_for(resource)}
>    end
>
>    def failure
>        return render :json => {:success => false, :errors =>
["Login
> failed."]}
>    end
>
>    def logged_in
>      return render :json => {:success => false, :errors =>
["Already
> logged in."]}
>    end
>
> However, once they are logged in, they are never logged out. So I want
> to be able to log out via curl and return json (curl is my testing
> devise right now, but ultimately I intend this to work through the
> iphone).
>
> I add this to users/session controller:
>
>  def destroy
>      respond_to do |format|
>        format.json {
>          return sign_out_and_redirect(resource_or_scope)
>        }
>      end
>    end
>
>    def sign_out_and_redirect(resource_or_scope)
>        scope = Devise::Mapping.find_scope!(resource_or_scope)
>        if Devise.sign_out_all_scopes
>          sign_out_all_scopes
>        else
>          sign_out(scope)
>        end
>        return render :json => {:status => :signed_out}
>      end
>
> I get a "udefined method or variable resource_or_scope". The
problem
> is if i define this sign_out_and_redirect method in the application
> controller, as another forum recommended:
>
> http://stackoverflow.com/questions/4522069/rails-3-devise-how-to-get-...
>
>  it never gets called when I do:http://localhost:3000/users/sign_out.json.
> And no json data is ever returned.
>
> And through curl, a strange thing happens with this:
>
> curl -X POSThttp://localhost:3000/users/sign_out.json-d
''''
>
> it says no route for "users/sign_out", which is odd it says that,
> since users/sign_out gets invoked fine on html page.
>
> thanks for response
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