Ruby on Rails-未初始化的常量錯誤

Question

我正在嘗試將ruby文件搜索應用程序轉換為rails。 我正處於初學者階段。 該應用程序在瀏覽器中不顯示任何錯誤消息，但是甚至不顯示任何結果。

當我嘗試調試時，它顯示有關單位常數的錯誤

C:/Workspace/DocumentManagement/app/controllers/document_management_controller.rb:1:in `<top (required)>': uninitialized constant ApplicationController (NameError)
    from c:/Ruby200/lib/ruby/gems/2.0.0/gems/ruby-debug-ide-0.4.22/lib/ruby-debug-ide.rb:86:in `debug_load'
    from c:/Ruby200/lib/ruby/gems/2.0.0/gems/ruby-debug-ide-0.4.22/lib/ruby-debug-ide.rb:86:in `debug_program'
    from c:/Ruby200/lib/ruby/gems/2.0.0/gems/ruby-debug-ide-0.4.22/bin/rdebug-ide:110:in `<top (required)>'
    from c:/Ruby200/bin/rdebug-ide:23:in `load'
    from c:/Ruby200/bin/rdebug-ide:23:in `<main>'

這些是應用程序文件：在“查看”文件夾中：

_form.html.erb

         <%= form_tag("/search", method: "get") do %>  #calls controller search method
        <%= label_tag(:path, "Search for filename including root path:") %>
        <p>
        <%= text_field_tag(:path) %>
        <p></p>
        <p></p>
        <%= label_tag(:term, "enter search term:") %>
        <p>
        <%= text_field_tag(:term) %>

    <p></p>
    <p></p>
    </p>
    <p></p>
    <%= submit_tag("Search") %>
    <% end %>

search.html.erb

<% provide(:title, 'Search') %>
<p>
This is Page will prompt for the search term and the root directory
<%= render 'form' %> 
<p></p><p></p><p></p><p></p><p></p><p></p>

<p>Showing Results</p>


<% @content=Content.showContent %>

<% @content=Content.showContent %>
<% @keys=@content.keys %>
<%  @keys.each do |key| %>
<h1><strong> <big> <%= key %> </big></strong></h1>
<p></p><p></p><p></p><p></p><p></p><p></p>
<% @value=@content[key] %>
<%@v=@value.to_s%>
<textarea style="width: 600px; height: 350px;">  <%=@v%></textarea>
<%end%>
<% @content.clear%> 

文檔管理器

class DocumentManagementController < ApplicationController

 before_filter :doIt  # does this on startup

 def doIt
    @searchterm=Search.new
    Content.container
  end

  def search

    @search_p = params[:path]
    @search_t = params[:term]
begin

      #@searchterm=Search.new(@search_p, @search_t)
      @searchterm.init
      @searchterm.distinguish
      #@searchterm.navigate

    rescue
    end
end


  def insertIntoDb
  end
end

模型文件夾中的Search.rb，包含搜索和內容類

class Search
# constructor
def init(a,b)
  @path = Dir.chdir(a)
  @pathaddress = a
  @content=Dir.entries(".")
  @term=b
  @files=Array.new
  @folder=Array.new
  @wordFiles = Array.new
  @pdfFiles = Array.new
  @textFiles = Array.new 
end


def distinguish()
  puts "*************************************************"
  puts "Following files Found"
  begin
      Find.find(@pathaddress) do |path|
        @files << path
        puts path
      end
      puts "*************************************************"
      classifyFile()
     rescue => e
       puts "An exception raised in distinguish Method"
     end
end

# Method to distinguish between file and directory
#def distinguish(dir)
  #begin
   # dir.each do|x|
      #if File.directory?(x) then
       # @folder << x
      #else
       # @files << x
     # end 
   # end
    #classifyFile()
   # rescue => e
    #  puts "An exception raised in distinguish Method"
    #end
#end

# Method to Classify text files, word files and pdf documents
def classifyFile()

  begin
  @files.each do |fileName|
      if fileName.include?(".doc" || ".docx")
      @wordFiles << fileName
    elsif fileName.include?(".pdf")  
      @pdfFiles << fileName
    elsif fileName.include?(".txt") 
      @textFiles  << fileName
    else

     end 
  end 
  processTextFiles()
  processWordFiles()
  processPdfFiles() 
   rescue => e
       puts "An exception raised in classifyFile Method"
    end
end

# Method to check if there any text files to process
def processTextFiles()
  if @textFiles.empty? == false
    searchTextFile()
  end
end

# Method to check if there any Word files to process
def processWordFiles()
  if @wordFiles.empty? == false
    searchWordFile()
  end
end

# Method to check if there any Pdf files to process
def processPdfFiles()
   if @pdfFiles.empty? ==false
      searchPdfFile()
    end
end

# Method to search for Word File
def searchWordFile()
  begin
  require 'win32ole'
  @wordFiles.each do |fileName|
    break if fileName.include?("~")
    #fileName = @pathaddress + "/" + fileName 
    fileName = fileName.gsub("/", "//")
    doc  = WIN32OLE.connect(fileName)
    doc.sentences.each do |x|
     if x.text.include?(@term)
       puts "Found term in " + fileName
       puts "Reading the file contents of " + fileName
       puts "-------------------------------------------------------------------"
       doc.sentences.each do |y|
         Content.add(fileName, y.text)
         puts y.text
       end
       puts "-------------------------------------------------------------------"
      doc.close()
       end
      end
      end
      rescue => e
        puts "An exception raised in searchWordFile Method"
      end
  end


# Method to search PDF files  
def searchPdfFile()
 begin
 @pdfFiles.each do |fileName|
 reader = PDF::Reader.new(fileName)
   reader.pages.each do |page|
        if page.text.include?(@term)
           puts "Found term in " + fileName
           puts "Reading the file contents of " + fileName
           puts "-------------------------------------------------------------------"
           print page.text
           Content.add(fileName, page.text)
        end
       puts "\n-------------------------------------------------------------------"
      end
    end
  rescue => e
     puts "An exception raised in searchPdfFile Method"
  end
end

# Method to search term in files
def searchTextFile() 
begin
  @textFiles.each do |fileName| #iterate through each files
      fileName = fileName.gsub("\\", "//")
     inputArray = File.readlines(fileName) 
     inputArray.each do|line|
       if line.include?(@term)
                puts "Found term in " + fileName
                puts "Reading the file contents of " + fileName
                 puts "-------------------------------------------------------------------"
                printFileContents(fileName)
        end
     end            
  end
  rescue => e
     puts "An exception raised in searchTextFile Method"
  end
end



# Method to print results on screen
def printFileContents(file)
begin
    puts File.read(file)
    puts "-------------------------------------------------------------------"
    rescue => e
     puts "An exception raised in printFileContents Method"
  end
end

end # End of Search class






class Content

def self.container
  @@theContent=Hash.new
end

  def self.add(key,value)
    @@theContent[key]=value
end
  def self.showContent
    @@theContent
  end

end

配置路由文件

Rails.application.routes.draw do
  match '/search', to:'document_management#search', via:'get'

  get 'document_management/search'

  get 'document_management/insertIntoDb'

  # The priority is based upon order of creation: first created -> highest priority.
  # See how all your routes lay out with "rake routes".

  # You can have the root of your site routed with "root"
  # root 'welcome#index'

  # Example of regular route:
  #   get 'products/:id' => 'catalog#view'

  # Example of named route that can be invoked with purchase_url(id: product.id)
  #   get 'products/:id/purchase' => 'catalog#purchase', as: :purchase

  # Example resource route (maps HTTP verbs to controller actions automatically):
  #   resources :products

  # Example resource route with options:
  #   resources :products do
  #     member do
  #       get 'short'
  #       post 'toggle'
  #     end
  #
  #     collection do
  #       get 'sold'
  #     end
  #   end

  # Example resource route with sub-resources:
  #   resources :products do
  #     resources :comments, :sales
  #     resource :seller
  #   end

  # Example resource route with more complex sub-resources:
  #   resources :products do
  #     resources :comments
  #     resources :sales do
  #       get 'recent', on: :collection
  #     end
  #   end

  # Example resource route with concerns:
  #   concern :toggleable do
  #     post 'toggle'
  #   end
  #   resources :posts, concerns: :toggleable
  #   resources :photos, concerns: :toggleable

  # Example resource route within a namespace:
  #   namespace :admin do
  #     # Directs /admin/products/* to Admin::ProductsController
  #     # (app/controllers/admin/products_controller.rb)
  #     resources :products
  #   end
end

Answer 1

在app / controllers下，您應該有一個application_controller.rb，看起來像這樣...

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception
end

當您創建新項目“ rails new myproject”時，它會自動創建

Answer 2

我認為您缺少ApplicationController。 所有其他控制器都繼承自此類

一個簡單的application_controller.rb

class ApplicationController < ActionController::Base
end