迁移文件反向生成

rake db:schema:dump

  1 require File.expand_path(File.dirname(__FILE__) + "/../config/environment")
  2 require 'rails'            
  3 ActiveRecord::Base.transaction do
  4   puts "start ..."
  5 
  6 
  7   code = File.open(Rails.root.to_s + "/db/schema.rb","r")
  8   code = code.read         
  9 
 10   code = code.gsub(/create_table/,"$create_table")
 11 
 12   code.split("$").each do |code|  
 13     table_name = code.split(",").first.gsub("create_table","").gsub("\"","").gsub(" ","")
 14     cmd = "bundle exec rails g migration create_#{table_name}"
 15     `#{cmd}`               
 16   end
 17 
 18 
 19 
 20 
 21   puts "end..."            
 22 end