小编wil*_*ell的帖子

我在Mac上安装了Python Anaconda(OS Mavericks).我想在Mac上恢复默认版本的Python.最好的方法是什么？我应该删除~/anaconda目录吗？还需要进行其他更改吗

目前,当我跑步时,which python我得到这条道路:

/Users/username/anaconda/bin/python

我有一个Amazon RDS实例.自设置超过1-2周以来,可用内存一直在下降,从15GB内存下降到大约250MB.由于它在最后几天已经降低了这个低点,它已经开始像一个锯齿模式,其中可用内存下降到这个范围(250 - 350MB),然后以锯齿模式回升到500 - 600MB.

申请质量没有明显下降.但是,我担心数据库会耗尽内存并崩溃.

是否存在RDS实例内存不足的危险？是否有一些设置或参数我应该查看以确定实例是否设置正确？造成这种锯齿模式的原因是什么？

我正在关注Rails教程.我遇到了RVM的版本问题,并且遇到了很多错误.我想重新开始使用Ruby,Rails,Gemfiles等的干净版本.

任何人都可以给我一些关于如何卸载Ruby-on-Rails环境的简要说明吗？

我正在使用rails创建新产品,并希望为每个产品添加一个类别.

我有三个表:产品,类别和分类(存储产品和类别之间的关系).我正在尝试使用嵌套属性来管理分类的创建,但不确定应如何更新我的控制器和视图/表单,以便新产品也更新分类表.

这是我的模特:

class Product < ActiveRecord::Base
 belongs_to :users
 has_many :categorizations
 has_many :categories, :through => :categorizations
 has_attached_file :photo
 accepts_nested_attributes_for :categorizations, allow_destroy: true

 attr_accessible :description, :name, :price, :photo

 validates :user_id, presence: true

end


class Category < ActiveRecord::Base
 attr_accessible :description, :name, :parent_id
 acts_as_tree
 has_many :categorizations, dependent: :destroy
 has_many :products, :through => :categorizations

end


class Categorization < ActiveRecord::Base
  belongs_to :category
  belongs_to :product
  attr_accessible :category_id, :created_at, :position, :product_id

end

这是我的新产品控制器:

def new
    @product = Product.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render …

我们遇到过一个问题，即一个 IP 向我们的服务器发出数百个请求，从而导致 RDS 数据库过载。在这种类似 DOS 的行为的情况下，有没有办法将我们的 AWS ELB 设置为阻止？

我尝试对heroku进行git推送时遇到错误(git push heroku master).我在雪松堆栈上,我的Gemfile指定sqlite 1.3.5.这是错误:

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
   /usr/local/bin/ruby extconf.rb
   checking for sqlite3.h... no
   sqlite3.h is missing. Try 'port install sqlite3 +universal'
   or 'yum install sqlite-devel' and check your shared library search path (the
   location where your sqlite3 shared library is located).
   *** extconf.rb failed ***
   Could not create Makefile due to some reason, probably lack of
   necessary libraries and/or headers.  Check the mkmf.log file for more
   details.  You may need configuration options.
   Provided configuration …

我正在运行命令"gem update --system".我收到以下错误消息.任何帮助,将不胜感激!

我正在运行Rails 1.9.2补丁136和ruby 3.0.3.

Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems/source_index.rb:62:in `installed_spec_directories': undefined method `path' for Gem:Module (NoMethodError)
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems/source_index.rb:52:in `from_installed_gems'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems.rb:914:in `source_index'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems/gem_path_searcher.rb:98:in `init_gemspecs'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems/gem_path_searcher.rb:13:in `initialize'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems.rb:873:in `new'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems.rb:873:in `searcher'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems.rb:495:in `find_files'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems.rb:1034:in `load_plugins'
    from /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rubygems-update-1.4.1/lib/rubygems/gem_runner.rb:84:in `<top (required)>'
    from <internal:lib/rubygems/custom_require>:29:in `require'
    from <internal:lib/rubygems/custom_require>:29:in `require'
    from setup.rb:25:in `<main>'

我的环境如下:

• RUBYGEMS版本:1.3.7
  • RUBY VERSION:1.9.2(2010-12-25 patchlevel 136)[x86_64-darwin10.4.0]
  • 安装目录:/Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial
  • RUBY EXECUTABLE:/Users/woshea/.rvm/rubies/ruby-1.9.2-p136/bin/ruby
  • 可执行目录:/Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/bin
  • RUBYGEMS PLATFORMS:
  • 红宝石
  • x86_64的-达尔文-10
  • 创业板路径:
    • /Users/woshea/.rvm/gems/ruby-1.9.2-p136@rails3tutorial
    • /Users/woshea/.rvm/gems/ruby-1.9.2-p136@global
  • 创业板配置:
    • :update_sources => true
    • :verbose => true
    • :benchmark => false
    • :backtrace => …

我正在尝试在Mac OSX上安装Magento 1.5 Community Edition.我正在使用MAMP Pro重定向url test.com以运行特定的Magento 1.5文件夹.

在开始安装过程之前,我收到一组错误消息.任何人都可以帮助破译吗？

处理您的请求时出错

SQLSTATE[42000] [1044] Access denied for user ''@'localhost' to database 'andrey_konosov_build'

Trace:
#0 /Applications/MAMP/htdocs/magento15/lib/Zend/Db/Adapter/Pdo/Mysql.php(96): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /Applications/MAMP/htdocs/magento15/lib/Varien/Db/Adapter/Pdo/Mysql.php(251): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /Applications/MAMP/htdocs/magento15/lib/Zend/Db/Adapter/Abstract.php(459): Varien_Db_Adapter_Pdo_Mysql->_connect()
#3 /Applications/MAMP/htdocs/magento15/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#4 /Applications/MAMP/htdocs/magento15/lib/Varien/Db/Adapter/Pdo/Mysql.php(333): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array)
#5 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Resource/Type/Db/Pdo/Mysql.php(45): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8')
#6 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Resource.php(93): Mage_Core_Model_Resource_Type_Db_Pdo_Mysql->getConnection(Object(Mage_Core_Model_Config_Element))
#7 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(297): Mage_Core_Model_Resource->getConnection('core_read')
#8 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(312): Mage_Core_Model_Mysql4_Abstract->_getConnection('read')
#9 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Mysql4/Cache.php(41): Mage_Core_Model_Mysql4_Abstract->_getReadAdapter()
#10 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Cache.php(434): Mage_Core_Model_Mysql4_Cache->getAllOptions()
#11 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Cache.php(469): Mage_Core_Model_Cache->_initOptions()
#12 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/App.php(1137): Mage_Core_Model_Cache->canUse('config')
#13 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Config.php(412): Mage_Core_Model_App->useCache('config')
#14 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/Config.php(294): Mage_Core_Model_Config->_canUseCacheForInit()
#15 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/App.php(395): Mage_Core_Model_Config->loadModulesCache()
#16 /Applications/MAMP/htdocs/magento15/app/code/core/Mage/Core/Model/App.php(329): Mage_Core_Model_App->_initModules() …

我正在学习如何在StackMob中设置iPhone应用程序项目的教程.这是指令:

"在项目的某个地方,例如项目的.pch文件,导入SystemConfiguration和MobileCoreServices框架."

StackMob提供了一组基础文件,一种示例应用程序.我应该在这些文件中查找.pch文件？