Beginner: First 'app' not displaying in browser

I have just started looking at Ruby on Rails and am following a book
‘Beginning Ruby on Rails’.

The first exercise is to display a webpage but when entering the url in
Firefox it doesnt display.

I get this error message:

Page title:

Action Controller: Exception caught

Page body:

Routing Error

no route found to match “/app/greeting” with {:method=>:get}

All I did was add these lines:
def greeting
end

to application.rb so it now looks like:

Filters added to this controller apply to all controllers in the

application.

Likewise, all the methods added will be available for all controllers.

class ApplicationController < ActionController::Base

Pick a unique cookie name to distinguish our session data from

others’
session :session_key => ‘_hello_session_id’
def greeting
end
end

Any ideas?

Thanks.

Joe 3000 wrote:

I have just started looking at Ruby on Rails and am following a book
‘Beginning Ruby on Rails’.

The first exercise is to display a webpage but when entering the url in
Firefox it doesnt display.

I get this error message:

Page title:

Action Controller: Exception caught

Page body:

Routing Error

no route found to match “/app/greeting” with {:method=>:get}

All I did was add these lines:
def greeting
end

to application.rb so it now looks like:

Filters added to this controller apply to all controllers in the

application.

Likewise, all the methods added will be available for all controllers.

class ApplicationController < ActionController::Base

Pick a unique cookie name to distinguish our session data from

others’
session :session_key => ‘_hello_session_id’
def greeting
end
end

Any ideas?

Thanks.

I’ve never seen that book, but as far as I know the “application.rb”
file is not meant to be used that way. What you need to do is generate a
new controller and put “def greeting” in there. For example in the
console/command line type:

/script/generate controller test

That should create a file called “test_controller.rb”. Open that file
and put “def greeting” in there. The URL will then be “/test/greeting”.
Of course, you also need to create a view for greeting called
“greeting.rhtml” that conatins some HTML, or you need to render text
directly in the controller.

Anyway, I don’t want to get into a major rails tutorial. I mainly wanted
to point out the usual way to start up a rails application. Sounds like
that book may be a bit too complicated for the basics or you’re not
following it correctly. I recommend you look at the following very, very
simple and well written A-Z tutorial:

http://www.onlamp.com/pub/a/onlamp/2005/01/20/rails.html

Joe 3000 wrote:

Routing Error

no route found to match “/app/greeting” with {:method=>:get}

By default, the URL for /app/greeting will look for an app controller
with method greeting. Since you do not have an app_controller, it
failed.

Btw, ApplicationController should be used as a base class, not as a
concrete class.

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