意外keyword_do_block

Question

下面的代码片段在我的Rails 3.0.3中运行良好：

class Lab1pd1amController < ApplicationController
  def index
     respond_to do |format|
     @students = Student.find_by_sql("SELECT * FROM students WHERE students.session = 'AM' and students.pd1 = 'Science' ORDER BY lname ASC")
      format.html # index.html.erb
      format.xml  { render :xml => @students }
    end
  end

 def show
   @students = Student.find(params[:all])

   respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @student }
    end
 end
end

但是，当我使用Heroku进行部署时，我会得到以下语法错误消息(在Heroku日志上)：

/app/.bundle/gems/ruby/1.9.1/gems/activesupport-3 .0.3/lib/active_support/dependencies.rb:239:in‘`require'：/app/app/controllers/lab1pd1am_controller.rb:1:语法错误，意外keyword_do_block，expecting’；或'\n‘(SyntaxError)

Answer 1

在你做git push heroku master之前，我会确保有什么东西没有溜进去。

也需要清理一下。

class Lab1pd1amController < ApplicationController
  def index
    @students = Student.where(:session => "AM", :pd1 => "Science").order("lname ASC")

     respond_to do |format|         
      format.html # index.html.erb
      format.xml  { render :xml => @students }
    end
  end

 def show
   @student = Student.find(params[:all])

   respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @student }
    end
 end
end

您还可以将respond_to替换为respond_to/respond_with组合，以便更好地清理它。