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dlo021

高级会员

第 2909 位会员 / 2012-07-17

89 篇帖子 / 367 条回帖

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给新手一点学习建议 at 2012年08月08日

#1 楼 @zw963 谢谢！
刚才添加一个 gem 'rails-timeago' 所有页面报错 at 2012年08月08日

#2 楼 @evan 刚才换了一个名字好了为什么这样？默认的就是|blog| ，而且之前都好的。
刚才添加一个 gem 'rails-timeago' 所有页面报错 at 2012年08月08日

之前没有添加 gem rails-timeago之前都正常的，实在不知道为什么在哪儿了，搜也搜不出来类似的问题，看来我又要重做了。

刚才添加一个 gem 'rails-timeago' 所有页面报错 at 2012年08月08日

Started GET "/" for 127.0.0.1 at 2012-08-08 12:50:38 +0800
Processing by HomeController#index as HTML
  Blog Load (0.1ms)  SELECT "blogs".* FROM "blogs" 
  Rendered home/index.html.slim within layouts/application (45.4ms)
Completed 500 Internal Server Error in 177ms

ActionView::Template::Error (`@@blogs.each do |blog|' is not allowed as an instance variable name):
    1: #main
    2:   h2 This is just a Blank Homepage!
    3:   ul.article-list
    4:     - @blogs.each do |blog|
    5:       li
    6:         article
    7:           header
  app/views/home/index.html.slim:4:in `_app_views_home_index_html_slim___808974069374869356_70347745410000'


  Rendered /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.6/lib/action_dispatch/middleware/templates/rescues/_trace.erb (6.3ms)
  Rendered /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.6/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
  Rendered /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.6/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (52.0ms)

slim,把 erb 改成 slim 之后，表单提交报错。 at 2012年08月08日

= form_for(@blog) do |f|
  - if @blog.errors.any?
    #error_explanation
      h2 = pluralize(@blog.errors.count,"errors")
      ul
        - @blog.errors.full_messages.each do |msg|
          li = msg

  .field
    label for="title" Title
    br
    = f.text_field :title
  .field
    label for="content" Content
    br
    = f.text_area :content

  .actions
    input type="submit" value="POST IT!"

这样 ok 了，还有换成f.text_field :title这样前面加上=号就好了 = f.text_field :title

slim,把 erb 改成 slim 之后，表单提交报错。 at 2012年08月08日

好的谢谢你

slim,把 erb 改成 slim 之后，表单提交报错。 at 2012年08月08日

      h2 = pluralize(@blog.errors.count,"error")
      ul
        - @blog.errors.full_messages.each do |msg|
          li 
            = msg```

这里弄错了,是一个` - @blog.errors.full_messages.each do |msg|`
输出正常，但是还是提交报错

很好的 vim 套件 at 2012年08月07日

#5 楼 @sectic vico 很好很好！太好了
看了 huacnlee 的简历，感觉也是挺爱折腾的一个人，是不是高手都这样呀？ at 2012年08月07日

#10 楼 @bony ？？？？？？
看了 huacnlee 的简历，感觉也是挺爱折腾的一个人，是不是高手都这样呀？ at 2012年08月07日

贵在坚持！贵在执行！加油！
ios 可以刻录到 dvd 上作为安装盘吗？ cd 用光了 at 2012年08月06日

好的谢谢
Cancan 實作角色權限設計的最佳實踐 at 2012年08月06日

#8 楼 @JeskTop 谢谢
如何设置一个全局实例变量，在所有的页面都可以访问 at 2012年08月05日

#2 楼 @xds2000 谢谢
如何设置一个全局实例变量，在所有的页面都可以访问 at 2012年08月05日
我这样写：
```
<% (Product.all).each do |product| %>
  <%= link_to product.name %>
<% end %>
```
这样可以的，我把@products直接用 product.all 代替，但是这应该是很不科学的吧？
写给大家看的 Rails 部署：第一篇简单快捷的部署方案 at 2012年08月05日

先收藏了，马上要用了，哈哈！
gem 'carrierwave'创建一个 ImageUpload 可以重复用在不同的 model 里面吗？ at 2012年08月05日

我搜到几个了，先试试，估计有帮助的。

gem 'carrierwave'创建一个 ImageUpload 可以重复用在不同的 model 里面吗？ at 2012年08月05日

=> Booting WEBrick
=> Rails 3.2.6 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2012-08-05 19:01:35] INFO  WEBrick 1.3.1
[2012-08-05 19:01:35] INFO  ruby 1.9.3 (2012-04-20) [x86_64-darwin11.4.0]
[2012-08-05 19:01:35] INFO  WEBrick::HTTPServer#start: pid=35806 port=3000
/Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/carrierwave-0.6.2/lib/carrierwave/processing/rmagick.rb:248: [BUG] Segmentation fault
ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.4.0]

-- Control frame information -----------------------------------------------
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c:0011 p:0124 s:0070 b:0070 l:000069 d:000069 METHOD /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.2.6/lib/action_dispatch/middleware/static.rb:62
c:0010 p:0032 s:0064 b:0064 l:000063 d:000063 METHOD /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.6/lib/rails/engine.rb:479
c:0009 p:0034 s:0060 b:0060 l:000059 d:000059 METHOD /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.6/lib/rails/application.rb:220
c:0008 p:0015 s:0056 b:0056 l:000055 d:000055 METHOD /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/content_length.rb:14
c:0007 p:0015 s:0047 b:0047 l:000046 d:000046 METHOD /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.6/lib/rails/rack/log_tailer.rb:17
c:0006 p:0356 s:0042 b:0042 l:000041 d:000041 METHOD /Users/yuwen/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/handler/webrick.rb:59
c:0005 p:0257 s:0030 b:0030 l:000029 d:000029 METHOD /Users/yuwen/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/webrick/httpserver.rb:138
c:0004 p:0393 s:0020 b:0020 l:000019 d:000019 METHOD /Users/yuwen/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/webrick/httpserver.rb:94
c:0003 p:0126 s:0009 b:0009 l:0008d8 d:000008 BLOCK  /Users/yuwen/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/webrick/server.rb:191
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:---- s:0002 b:0002 l:000001 d:000001 TOP   

-- Ruby level backtrace information ----------------------------------------

下面还有好几屏幕

devise::如何阻止不同的用户访问其他用户的 “域”？是这样称呼吗？ at 2012年08月05日

在 20120804162920_devise_create_users.rb 里面看到没有：

class DeviseCreateUsers < ActiveRecord::Migration
  def change
    create_table(:users) do |t|
      ## Database authenticatable
      t.string :email,              :null => false, :default => ""
      t.string :encrypted_password, :null => false, :default => ""

      ## Recoverable
      t.string   :reset_password_token
      t.datetime :reset_password_sent_at

      ## Rememberable
      t.datetime :remember_created_at

      ## Trackable
      t.integer  :sign_in_count, :default => 0
      t.datetime :current_sign_in_at
      t.datetime :last_sign_in_at
      t.string   :current_sign_in_ip
      t.string   :last_sign_in_ip

      ## Confirmable
      # t.string   :confirmation_token
      # t.datetime :confirmed_at
      # t.datetime :confirmation_sent_at
      # t.string   :unconfirmed_email # Only if using reconfirmable

      ## Lockable
      # t.integer  :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts
      # t.string   :unlock_token # Only if unlock strategy is :email or :both
      # t.datetime :locked_at

      ## Token authenticatable
      # t.string :authentication_token


      t.timestamps
    end

    add_index :users, :email,                :unique => true
    add_index :users, :reset_password_token, :unique => true
    # add_index :users, :confirmation_token,   :unique => true
    # add_index :users, :unlock_token,         :unique => true
    # add_index :users, :authentication_token, :unique => true
  end
end

但是在 shema.rb 里面看到这些：

ActiveRecord::Schema.define(:version => 20120804202523) do

  create_table "articles", :force => true do |t|
    t.string   "title"
    t.text     "content"
    t.datetime "created_at", :null => false
    t.datetime "updated_at", :null => false
  end

  create_table "roles", :force => true do |t|
    t.string   "name"
    t.integer  "resource_id"
    t.string   "resource_type"
    t.datetime "created_at",    :null => false
    t.datetime "updated_at",    :null => false
  end

  add_index "roles", ["name", "resource_type", "resource_id"], :name => "index_roles_on_name_and_resource_type_and_resource_id"
  add_index "roles", ["name"], :name => "index_roles_on_name"

  create_table "users", :force => true do |t|
    t.string   "email",                  :default => "", :null => false
    t.string   "encrypted_password",     :default => "", :null => false
    t.string   "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.integer  "sign_in_count",          :default => 0
    t.datetime "current_sign_in_at"
    t.datetime "last_sign_in_at"
    t.string   "current_sign_in_ip"
    t.string   "last_sign_in_ip"
    t.datetime "created_at",                             :null => false
    t.datetime "updated_at",                             :null => false
    t.string   "name"
    t.string   "role"
  end

  add_index "users", ["email"], :name => "index_users_on_email", :unique => true
  add_index "users", ["reset_password_token"], :name => "index_users_on_reset_password_token", :unique => true

  create_table "users_roles", :id => false, :force => true do |t|
    t.integer "user_id"
    t.integer "role_id"
  end

  add_index "users_roles", ["user_id", "role_id"], :name => "index_users_roles_on_user_id_and_role_id"

end

不太弄的明白

gem 'carrierwave'创建一个 ImageUpload 可以重复用在不同的 model 里面吗？ at 2012年08月05日

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

[1]    35754 abort      rails s

gem 'carrierwave'创建一个 ImageUpload 可以重复用在不同的 model 里面吗？ at 2012年08月05日

现在重新编辑之前发布的 articles 的图片，也导致服务器退出这个问题
Cancan 實作角色權限設計的最佳實踐 at 2012年08月05日

楼主能否再扩展的写一下在用 cancan 之前的配置？比如 roles 这些？

我是参照别的地方来添加 roles 的，然后套用你的代码，但是一直有问题，现在是 user1 身份可以管理任何 action，但是其他身份的 user 没有权限，包括他自己先前发布的文章都不可以操作了。
devise::如何阻止不同的用户访问其他用户的 “域”？是这样称呼吗？ at 2012年08月05日

现在可以确定的是我的 default 角色的 user 没有:manage 的权限，不知道哪里出错
devise::如何阻止不同的用户访问其他用户的 “域”？是这样称呼吗？ at 2012年08月05日

#2 楼 @bony undefined method `user_id' for #Article:0x007f8ed88c8f48 哪个地方出错了？

devise::如何阻止不同的用户访问其他用户的 “域”？是这样称呼吗？ at 2012年08月05日

我用的 devise+cancan:

#models/ability.rb

class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new # guest user (not logged in)

    can :manage, :all if user.is? :admin
    can :manage, :all if user.is? :default
 end

end

#models/user.rb

class User < ActiveRecord::Base
  rolify
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  attr_accessible :name, :email, :password, :password_confirmation, :remember_me, :roles

  ROLES = %w[admin default banned]

  def is?(role)
    roles.include(tole.to_s)
  end


end

#controllers/articles_controller.rb

class ArticlesController < ApplicationController
  load_and_authorize_resource :except => [:index, :show]

end

#db/migrate/20120804202523_add_role_to_users.rb

class AddRoleToUsers < ActiveRecord::Migration
  def change
    add_column :users, :role, :string
  end
end

#db/schema.rb

# encoding: UTF-8

ActiveRecord::Schema.define(:version => 20120804202523) do

  create_table "roles", :force => true do |t|
    t.string   "name"
    t.integer  "resource_id"
    t.string   "resource_type"
    t.datetime "created_at",    :null => false
    t.datetime "updated_at",    :null => false
  end

  add_index "roles", ["name", "resource_type", "resource_id"], :name => "index_roles_on_name_and_resource_type_and_resource_id"
  add_index "roles", ["name"], :name => "index_roles_on_name"

  create_table "users", :force => true do |t|
    t.string   "email",                  :default => "", :null => false
    t.string   "encrypted_password",     :default => "", :null => false
    t.string   "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.integer  "sign_in_count",          :default => 0
    t.datetime "current_sign_in_at"
    t.datetime "last_sign_in_at"
    t.string   "current_sign_in_ip"
    t.string   "last_sign_in_ip"
    t.datetime "created_at",                             :null => false
    t.datetime "updated_at",                             :null => false
    t.string   "name"
    t.string   "role"
  end

  add_index "users", ["email"], :name => "index_users_on_email", :unique => true
  add_index "users", ["reset_password_token"], :name => "index_users_on_reset_password_token", :unique => true

  create_table "users_roles", :id => false, :force => true do |t|
    t.integer "user_id"
    t.integer "role_id"
  end

  add_index "users_roles", ["user_id", "role_id"], :name => "index_users_roles_on_user_id_and_role_id"

end

#views/articles/index.html.erb


<ul class="clearfix">
  <% if can? :update, @article %>
  <li class="clearfix"><%= link_to 'Edit', edit_article_path(@article) %></li>
  <% end %>
  <% if can? :destroy, @article %>
  <li class="clearfix"><%= link_to 'Destroy', @article, method: :delete, data: {confirm: 'Are you sure?'} %></li>
  <% end %>
</ul>

#views/articles/show.html.erb

<ul class="clearfix">
  <% if can? :update, @article %>
  <li class="clearfix"><%= link_to 'Edit', edit_article_path(@article) %></li>
  <% end %>
  <% if can? :destroy, @article %>
  <li class="clearfix"><%= link_to 'Destroy', @article, method: :delete, data: {confirm: 'Are you sure?'} %></li>
  <% end %>
</ul>

现在的情况是，除了 user1(估计是 admin) 拥有所有权限，其他身份的用户登陆之后都不能创建新的 article, 显示You are not authorized to access this page.,而且也无法访问了之前由他自己发布的 article 的 edit,destroy 功能，等于是完全变成浏览者的身份了。

rails "We're sorry, but something went wrong." at 2012年08月05日

解决了， get 'dashboard' => 'dashboard#dashboard'

我这样写就好了谢谢
我用脚手架生成的新闻,如何用不同的 layout 嵌套 index,show 和 new,edit 文件? at 2012年08月04日

#1 楼 @Rei 谢谢好久没见呵呵，我找了一个 ruby 的实习工作了
创建管理员和 rails 小项目的结构求指导 at 2012年07月27日

#4 楼 @chucai #6 楼 @Rei 好的，今晚继续！我还是参照你的 code_campo 来。感觉就象做智商测验！发现规律！
创建管理员和 rails 小项目的结构求指导 at 2012年07月27日

#2 楼 @jhjguxin 好的谢谢！
创建管理员和 rails 小项目的结构求指导 at 2012年07月27日

不知道是不是自己年级大了，记性不好了，另外我特别要求那种纯净的代码，没用的多一行都觉得是负担，所以根据教程用脚手架创建的有些地方就觉得是不是多余了
再问一个问题，关于那些只有一个页面的页面. at 2012年07月26日

#3 楼 @huacnlee 好的谢谢