menghuanwd (Dave Gu)

关于 before 的问题

menghuanwd — Tue, 05 Aug 2014 17:49:29 +0800

是不是 sinatra 没要这样的写法：

before :except => "/index" do
  do_somethings
end

我看了，rails，padrino 都有这样的功能，请问，我用 rails 的话，自己实现起来该怎么写

寻找可以部署的 rails 的空间！

menghuanwd — Tue, 30 Jul 2013 14:00:31 +0800

heroku : 可以部署上去，功能也是有的，但是上传的图片几个小时就消失了，感觉没有真实上传，只是个临时文件，肯跌。

cloudfoundry: 不会使用 mysql，cleardb 到底是什么玩意。

openShife: 域名被墙了还是什么的，反正就是一直转转，部署上去的访问不了。

求大神们介绍容易点的空间。 55555555555

在 Cloud Foundry 上使用 Mongoid 报错

menghuanwd — Mon, 29 Apr 2013 23:43:28 +0800

在本地跑完全没有问题，在 cloud foundry 上就不行了，logs 上显示：

Mongoid::Errors::NoSessionsConfig - 
Problem:
  No sessions configuration provided.
Summary:
  Mongoid's configuration requires that you provide details about each session that can be connected to, and requires in the sessions config at least 1 default session to exist.
Resolution:
  Double check your mongoid.yml to make sure that you have a top-level sessions key with at least 1 default session configuration for it. You can regenerate a new mongoid.yml for assistance via `rails g mongoid:config`.

 Example:
 \_\_development:
 \_\_\_\_sessions:
 \_\_\_\_\_\_default:
 \_\_\_\_\_\_\_\_database: mongoid_dev
 \_\_\_\_\_\_\_\_hosts:
 \_\_\_\_\_\_\_\_\_\_- localhost:27017

:
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions/factory.rb:61:in `create_session'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions/factory.rb:43:in `default'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions.rb:109:in `default'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions.rb:378:in `__session__'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions.rb:213:in `mongo_session'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions.rb:157:in `collection'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/sessions.rb:25:in `collection'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence/operations.rb:27:in `collection'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence/operations/insert.rb:27:in `block in persist'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence/insertion.rb:25:in `block (2 levels) in prepare'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:403:in `_run__3591010883385926694__create__1044911878628526733__callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_create_callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/callbacks.rb:114:in `run_callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence/insertion.rb:24:in `block in prepare'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:403:in `_run__3591010883385926694__save__1044911878628526733__callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_save_callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/callbacks.rb:114:in `run_callbacks'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence/insertion.rb:23:in `prepare'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence/operations/insert.rb:26:in `persist'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence.rb:50:in `insert'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/mongoid-3.0.9/lib/mongoid/persistence.rb:79:in `save'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/controller/user.rb:12:in `block in <top (required)>'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1415:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1415:in `block in compile!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:944:in `[]'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:944:in `block (3 levels) in route!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:960:in `route_eval'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:944:in `block (2 levels) in route!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:981:in `block in process_route'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:979:in `catch'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:979:in `process_route'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:943:in `block in route!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:942:in `each'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:942:in `route!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1053:in `block in dispatch!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1035:in `block in invoke'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1035:in `catch'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1035:in `invoke'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1050:in `dispatch!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:878:in `block in call!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1035:in `block in invoke'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1035:in `catch'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1035:in `invoke'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:878:in `call!'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:864:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-protection-1.5.0/lib/rack/protection/xss_header.rb:18:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-protection-1.5.0/lib/rack/protection/path_traversal.rb:16:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-protection-1.5.0/lib/rack/protection/json_csrf.rb:18:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-protection-1.5.0/lib/rack/protection/base.rb:49:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-protection-1.5.0/lib/rack/protection/base.rb:49:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-protection-1.5.0/lib/rack/protection/frame_options.rb:31:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-1.5.2/lib/rack/logger.rb:15:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-1.5.2/lib/rack/commonlogger.rb:33:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:209:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:202:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-1.5.2/lib/rack/head.rb:11:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:172:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1947:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1610:in `block in call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1693:in `synchronize'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/sinatra-1.4.2/lib/sinatra/base.rb:1610:in `call'
    /var/vcap/data/dea/apps/novel-0-2159116fd833d9547300187427374aa6/app/rubygems/ruby/1.9.1/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service'
    /var/vcap/data/packages/dea_ruby19/7.1/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
    /var/vcap/data/packages/dea_ruby19/7.1/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
    /var/vcap/data/packages/dea_ruby19/7.1/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
180.174.37.28, 172.30.8.253 - - [29/Apr/2013 15:26:38] "GET /user/add HTTP/1.1" 500 30 0.0014
172.30.49.27 - - [29/Apr/2013:15:26:38 UTC] "GET /user/add HTTP/1.0" 500 30
- -> /user/add、




main.rb :
require 'sinatra'
require "slim"
require 'mongoid'

require_relative 'controller/user'
require_relative 'model/user'

configure :development do
  enable :logging, :dump_errors, :run, :sessions
  Mongoid.load!(File.join(File.dirname(__FILE__), "config", "mongoid.yml"))
end

mongoid.yml :
development:
  sessions:
    default:
      database: guyifeng
      hosts:
        - localhost:27017

网上查了半天，说 mongoid 的版本换成 3.0.9 就可以，但是自己试了，还是同样的错误，求高手解答

Mongoid 模糊查询

menghuanwd — Sun, 21 Apr 2013 17:41:16 +0800

Book.where(:name => '%'+params[:name]+'%')，这么查，不行，网上搜到： @books = Book.where(:name => /params[:name].*/i)，这样查，也不行，求正确的 mongoid 模糊查询方式。

slim 引入 css

menghuanwd — Tue, 26 Mar 2013 21:33:34 +0800

求指导，哪位大神告诉我下，slim 是这么引入 css 样式文件的呢，还有 js,

gem 出错

menghuanwd — Mon, 04 Mar 2013 13:42:56 +0800

在执行任何 ruby 程序的时候都会出现这段，然后才是正常执行，求解

[/usr/lib/ruby/gems/1.9.1/specifications/rubyzip-0.9.9.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/launchy-2.2.0.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/netrc-0.7.7.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/heroku-2.35.0.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/heroku-api-0.3.7.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/excon-0.16.10.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/rest-client-1.6.7.gemspec] isn't a Gem::Specification (NilClass instead). [/usr/lib/ruby/gems/1.9.1/specifications/addressable-2.3.3.gemspec] isn't a Gem::Specification (NilClass instead).

学习 Sinatra 中遇到的一个小问题

menghuanwd — Tue, 15 Jan 2013 12:06:52 +0800

地址是：http://blogs.ejb.cc/archives/2840/first-met-sinatra-2

在删除任务这个功能的代码中， form.delete action='/task/#{task.id}' method='post' input type='hidden' name='_method' value='delete' input type='submit' value="删除" title='delete Task'

第二句话不能够理解。name=必须是"_method"，换成别的就报错，不知道这个的原理是什么？

mongodb 一对多关系的建立

menghuanwd — Thu, 20 Dec 2012 16:51:35 +0800

在 model 中： class Comment field :text, type: String embedded_in :user end

class User field :name, type: String field :age, type: Integer embeds_many :comments end

controller 中：def addComment @user = User.find(params[:user_id]) #错误的 @comment = @user.comments.new(params[:comment]) @comment.save redirect_to user_path('50d2aa5bc720b27792000002') end

应该怎么在 controller 中写如保存方法呢？如果嵌套的话那还需不需要这两个 modelne ??哪里有正确的教程啊...

carrierwave 怎么批量上传

menghuanwd — Sun, 18 Nov 2012 20:28:40 +0800

carrierwave 怎么设置批量上传？哪里有教程阿

Railscasts 视频中 #009 File uploading by Carrierwave

menghuanwd — Sat, 17 Nov 2012 11:45:32 +0800

我按照视频教程上照做的在保存的时候出现这个错误：

ActiveModel::MassAssignmentSecurity::Error in PostsController#create

Can't mass-assign protected attributes: attachmentable Rails.root: /home/user/upload

Application Trace | Framework Trace | Full Trace app/controllers/posts_controller.rb:48:in block in create' app/controllers/posts_controller.rb:45:increate' Request

Parameters:

{"utf8"=>"✓", "authenticity_token"=>"n7Si25bOgGofURmyxghGYYJrHdyj4IYEljLkFUfIZpg=", "post"=>{"title"=>"w", "content"=>"w"}, "attachment"=>"03.jpg", "commit"=>"Create Post"} Show session dump

求高手解答下：

文件上传

menghuanwd — Tue, 06 Nov 2012 09:05:10 +0800

哪里有文件上传的教程或者代码吗？想参考下，。

SQL 语句转变成 rails 语句问题

menghuanwd — Sun, 04 Nov 2012 20:57:17 +0800

select user_id from topics group by user_id order by count(user_id) desc 上面语句的 rails 该怎么写？

关于 rails form 的问题

menghuanwd — Wed, 31 Oct 2012 15:41:40 +0800

<%= form_for(@user) do |f| %> <%= f.label :name%> <%= f.text_field :name %>
<%= f.label :password%> <%= f.password_field :password%>
<%= f.submit "submit" %> <% end %>

报错提示：undefined method `model_name' for NilClass:Class

关于 mailer

menghuanwd — Sat, 13 Oct 2012 18:43:56 +0800

用 Action Mailer 来做个一个 rails 的发邮箱功能，教程中：

ActionMailer::Base.smtp_settings = { :address => "smtp.gmail.com",
:port => 587, :domain => "railscasts.com",
:user_name => "railscasts",
:password => "secret", :authentication => "plain", :enable_starttls_auto => true }

这些是什么意思啊，如果中自己的 Gmail 邮箱的话，以上要改哪些？

heroku 数据库配置

menghuanwd — Fri, 28 Sep 2012 13:07:01 +0800

把自己的小项目放在 heroku 上，但是所有牵扯到数据库的页面都不能访问， heroku run rake db:migrate 这条命令出现错误： A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. 这个错误， database.yml 配置： production: adapter: postgresql encoding: unicode database: DATABASE_URL pool: 5

求高手帮助，常在线