未定義的局部變量或方法'分類」主：對象（NameError）

Question

require 'csv' 
    load 'dbconnection.rb' 
    require 'activerecord' 

    class Definition<ActiveRecord::Base 

    end 
    csv_definition = File.read('C:/definition.csv') 
    spy_definition = CSV.parse(csv_definition, :headers => false) 
    spy_definition.each do |row| 
      Definition.create!(

          :id => row[id], 
          :category => row[category], 
          :name => row[name], 
          :dangerlevel => [dangerlevel], 
          :description => [description] 
          )  

        end 

我正在一個錯誤，如下所示：

datainsertion.rb:26: warning: Object#id will be deprecated; use Object#object_id 
datainsertion.rb:27: undefined local variable or method `category' for main:Object (NameError) 
    from datainsertion.rb:24:in `each' 
    from datainsertion.rb:24 
>Exit code: 1 

我需要加載該csv文件到數據庫，但我得到這個錯誤..，幫助我們解決這個問題。，

Answer 1

需要 'CSV' 負載 'dbconnection.rb' 需要的ActiveRecord'

class Definition<ActiveRecord::Base 
end 
CSV.foreach("C:/definition.csv") do |row| 
Definition.create!(
    :category =>row[0], 
    :name => row[1], 
    :dangerlevel => row[2], 
    :description => row[3] 
    ) 
end 

Answer 2

錯誤真的是你所需要的。您有一個尚未定義的變量類別。嘗試'類別'。