编写我的块时遇到问题，语法错误？

Question

如果您需要我发布其他信息，我会的！ 但我相信这只是语法？

不确定是不是错，但我相信它写的正确。

SyntaxError: /Users/cod3/carbuilds/app/controllers/builds_controller.rb:21: syntax error, unexpected else else ^~~~ /Users/cod3/carbuilds/app/controllers/builds_controller.rb:34: syntax error, unexpected end end ^~~ /Users/cod3/carbuilds/app/controllers/builds_controller.rb:94: syntax error, unexpected end-of-input, expecting end

这是我的块代码，它说我有语法错误，但我认为没关系，

如果我错了请纠正我

class BuildsController < ApplicationController
    get '/builds' do
        if logged_in?
            @builds = Build.all 
            erb :'builds/index'
        else
            erb :'users/login' #locals: {message: "Unable to Continue please login"}
        end
    end

    get "/builds/new" do
        redirect_if_not_logged_in
        @build = Build.new
        erb :"/builds/new"
      end

    post '/builds' do
        redirect_if_not_logged_in
      if params.values.any? {|value| value == ""}
         erb :'builds/new', #locals: {message: "Unable to Continue!"}
      else
        user = User.find(session[:user_id])
        @build = Build.create(title: params[:title], budget: params[:budget], user_id: params[:user.id])
        redirect to "/builds/#{@build.id}"
      end
    end

    get 'builds/:id' do
        if logged_in?
            @build = Build.find(params[:id])
            erb :'builds/show'
        else
            erb :'users/login', #locals: {message: "Access Denied"}
        end
    end

    get 'builds/:id/edit' do
        if logged_in?
            @build = Build.find(params[:id])
            erb :'builds/edit'
        else
            erb :'users/login' #locals: {message: "Access Denied"}
        end
    end

    patch '/builds/:id' do 
        if params.values.any? {|value| value == ""}
           @build = Build.find(params[:id])
           erb :'builds/edit', locals: {message: "You're missing information"}
           redirect to "/builds/#{params[:id]}/edit"
        else
          @build = Build.find(params[:id])
          @build.title = params[:title]
          @build.budget = params[:budget]
          @build.save
          redirect to "/builds/#{@build.id}"
        end
    end

    delete '/builds/:id/delete' do 
         @build = build.find(params[:id])
        if session[:user_id]
            @build = Build.find(params[:id])
          if @build.user_id == session[:user_id]
             @build.delete
             redirect to '/builds'
          else
             redirect to '/builds'
          end
        else
            redirect to '/login'
        end
    end

    private

    def set_build 
        @build = build.find_by_id(params[:id])
        if @build.nil?
          flash[:error] = "Couldn't find a build with id: #{params[:id]}"
          redirect "/builds"
        end
      end
    
      def redirect_if_not_authorized
        redirect_if_not_logged_in
        if !authorize_build(@build)
          flash[:error] = "You don't have permission to do that action"
          redirect "/builds"
        end
      end
   end
end

这是我的整个 BuildsController 文件。我正在创建一个构建 CAR BUILD 应用程序，它给了我这些语法错误。如果您有时间，我很乐意与您分享这一切，以便您可以看到我在做什么。这是一个大项目，但到目前为止，我只关注语法，所以这是一件好事。

Answer 1

1. 此行中有一个额外的尾随逗号：

erb :'users/login', #locals: {message: "Access Denied"}
#                 ^ here

1. 文件末尾的关闭ends 可能太多了。

您在多个地方的块缩进不正确。修复它们，完全捕捉/避免这些问题会容易得多。正确设置的编辑器甚至会为您自动设置缩进格式。

当然，它是“公正”的语法，但语法很重要，因为无效的语法不清楚。计算机不会猜测您的意图是什么，因此这意味着您的代码实际上毫无意义。

例如，数学语法错误导致无法明确解释：

(3 + 2 * 5

该表达可能意味着以下任何一种：

• (3) + 2 * 5 - 可能缺少) 位置
• (3 + 2) * 5 - 可能缺少) 位置
• (3 + 2 * 5) - 可能缺少) 位置
• 3 + 2 * 5 - 可能额外 (

英语中句法不明确导致句子模棱两可（因此实际上毫无意义）的示例：