我正在使用 IDE RubyMine 编写一个基于 Web 的 Ruby 程序。
我有几节课：
application_controller.rb:
class application_controller < ActionController::Base
# To change this template use File | Settings | File Templates.
# require './course_modules.rb'
def initialize
self.class.main_menu
end
=begin
def navigateTo(what)
what.new(v).display
mainMenu
end
=end
def self.main_menu
puts "What would you like to do?
1: Add module to a scheme
2: Remove module from a scheme
3: Query modules
4: Modify module
5: Register a student on a scheme
6: Remove a student from a scheme
7: Register a student on a module
8: Remove a student from a module"
case gets.strip
when "1"
CourseModules.add_module
when "2"
CourseModules.remove_module
when "3"
navigateTo CourseModules
when "4"
navigateTo CourseModules
when "5"
navigateTo Student
when "6"
navigateTo Student
when "7"
navigateTo Student
end
end
Application.new
end
和course_modules.rb:
class CourseModulesController < ActionController::Base
# To change this template use File | Settings | File Templates.
@@moduleScheme = nil
@@moduleYear = nil
#@moduleTitle = ""
@noOfModulesInScheme = 0
$schemes = {}
$module_ID = 0
$module_exists = false
def self.moduleYear
@@moduleYear
end
def initialize(v)
@val = v
end
# Set and get the @val object value
def set (v)
@val = v
end
def get
return @val
end
# Attempt at add_module method on 21/08/2012 at 16:30
def self.add_module
# schemes = {}
scheme_exists = false
add_another_scheme = true
# module_exists = false
add_another_module = true
while add_another_scheme
print "Enter scheme name: "
scheme_name = gets
$schemes.has_key?(scheme_name.chop) ? scheme_exists = true : scheme_exists = false
if !scheme_exists
$schemes[scheme_name.chop] = []
puts "Scheme #{scheme_name.chop} has been added to the system"
elsif
scheme_exists == true
puts "This scheme has already been added"
end
while add_another_module
print "Enter module name: "
module_name = gets
$schemes[scheme_name.chop].include?(module_name.chop) ? true : $schemes[scheme_name.chop] << module_name.chop
# puts "Module #{module_name.chop} has been added to #{scheme_name.chop}"
# 22/08/2012 at 14:15 Now need to read in each module's unique identifier and year it belongs to
print "Enter module ID: "
$module_ID =gets
$schemes[scheme_name.chop].include?($module_ID.chop) ? true : $schemes[scheme_name.chop] << $module_ID.chop
$schemes.has_key?($module_ID.chop) ? module_exists = true : module_exists = false
print "Enter the academic year to which the module belongs: "
module_year = gets
$schemes[scheme_name.chop].include?(module_year.chop) ? true : $schemes[scheme_name.chop] << module_year.chop
if !$module_exists
$schemes[$module_ID.chop] = []
puts "Module #{$module_ID.chop} : #{module_name.chop} has been added to #{scheme_name.chop} for the year #{module_year}"
elsif
$module_exists == true
puts "A module with this ID has already been added to the scheme, please check if the module already exists, or choose another ID "
else
# puts "Module #{module_name.chop}, #{module_ID.chop} has been added to #{scheme_name.chop} for the year #{module_year}"
end
# puts "Module #{module_name.chop}, #{module_ID.chop} has been added to #{scheme_name.chop}"
print "Add another module? "
ask_if_user_wants_to_add_another_module = gets
if(ask_if_user_wants_to_add_another_module.chop == "y" or ask_if_user_wants_to_add_another_module == "yes")
add_another_scheme = false
else if(ask_if_user_wants_to_add_another_module.chop != "y" or ask_if_user_wants_to_add_another_module != "yes")
Application.main_menu
end
end
end
print "Add another scheme? "
ask_if_user_wants_to_add_another_scheme = gets
if !(ask_if_user_wants_to_add_another_scheme.chop == "y" or ask_if_user_wants_to_add_another_scheme.chop == "yes")
add_another_scheme = false
end
puts $schemes
end
while add_another_module
print "Enter scheme name: "
scheme_name = gets
#$schemes.has_key?(scheme_name.chop) ? scheme_exists = true : scheme_exists = false
scheme_exists = $schemes.has_key? (scheme_name.chop)
if !scheme_exists
print "Enter module name: "
module_name = gets
$schemes[scheme_name.chop] = module_name.chop
puts "Scheme #{scheme_name.chop} with module #{module_name} has been added to the system"
else
scheme_exists = false
puts "This scheme has already been added"
puts "Enter module name: "
module_name = gets
$schemes[scheme_name.chop] = module_name.chop
puts "Scheme #{scheme_name.chop} with module #{module_name} has been added to the system"
end
print "Add another module? "
ask_if_user_wants_to_add_another_module = gets
if !(ask_if_user_wants_to_add_another_module.chop == "y" or ask_if_user_wants_to_add_another_module.chop == "yes")
add_another_module = false
end
end
puts $schemes
end
def self.remove_module
print "Which scheme would you like to remove a module from? "
scheme_name = gets
#$schemes.has_key?(scheme_name.chop) ? scheme_exists = true : scheme_exists = false
scheme_exists = $schemes.has_key? (scheme_name.chop)
if !scheme_exists
$schemes[scheme_name.chop] = []
puts "Scheme #{scheme_name.chop} doesn't exist"
else
scheme_exists = true
puts "Which module would you like to remove from #{scheme_name.chop}?"
$module_ID = gets
if !$module_exists
$schemes[$module_ID.chop] = []
puts "Module #{$module_ID.chop} : does not exist in #{scheme_name.chop} "
else
module_exists = true
puts "Module #{$module_ID.chop} has been removed from #{scheme_name.chop} "
# puts "Module #{module_name.chop}, #{module_ID.chop} has been added to #{scheme_name.chop} for the year #{module_year}"
end
end
end
end
当我浏览到
http://localhost:3000
在 Firefox 中，要查看我的网页，我会得到一个显示错误消息的网页：
错误消息说：
SyntaxError in ApplicationController#main_menu
(Filepath)/application_controller.rb:1: class/module name must be CONSTANT
class application_controller < ActionController::Base
Rails.root: (Filepath)/CourseManagementSystem
有谁知道为什么我没有显示我的 Web 应用程序的网页？我怎样才能把这个正确？