After modifying the controller and the view code the new function get_student fails because it doesn't get the student ID

Below is the error code generated by the Mongrel server

Processing AwardsController#index (for 127.0.0.1 at 2009-09-18 12:24:42) [GET]

ActiveRecord::RecordNotFound (Couldn't find Student without an ID):
app/controllers/awards_controller.rb:96:in `get_student'

Rendered rescues/_trace (188.0ms)
Rendered rescues/_request_and_response (0.0ms)
Rendering rescues/layout (not_found)


Below the rails environment

Ruby version 1.8.6 (i386-mswin32)
RubyGems version 1.3.5
Rack version 1.0
Rails version 2.3.3
Active Record version 2.3.3
Action Pack version 2.3.3
Active Resource version 2.3.3
Action Mailer version 2.3.3
Active Support version 2.3.3
Application root C:/Documents and Settings/SSanjuan/Mis documentos/Ruby/Rails/students
Environment development
Database adapter mysql
Database schema version 20090918095050

Thanks

(this applies to both the online and print edition).


Under Example 16-1, the code:

:html => {:id =>
'enrollment_form'}

Needs to between the first and second parenthensis, so that instead of:

<% form_tag(course_remove_student_path(@student)), :html => {:id =>
'removal_form'} do %>

It will be:

<% form_tag(course_add_student_path(@student), :html => {:id =>
'enrollment_form'}) do :%>

The change will have to be made on the "course_remove_student_path" and "course_add_student_path" - otherwise, it'll crash.

Also, this:

<table id="CoursesEnrolled">

Needs to bolded.

On another note, the paragraph before example 16-2 was incorrect. Besides changing:

"Course.find(params[:course]"

to

"course_ids = params[:courses]"

you also have to create a

"course_ids.each do |course_id|"
*stuff*
end

block and then put the existing "unless @student.enrolled_in?(course)" block within it. That was in the source coded in the example, but the paragraph didn't explain that you need to do that.