小编Rus*_*nov的帖子

因为这个产品是新产品,所以我期待开发一个应用程序,因此对API使用有任何限制,例如:

• 上传和下载配额
• 每个应用的请求
• 等等

每次执行Elixir代码或输入时,如何解决此警告iex？

警告:VM正在使用latin1的本机名编码运行,这可能会导致Elixir出现故障,因为它需要utf8.请确保您的语言环境设置为UTF-8(可以通过在shell中运行"locale"来验证)

$ locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.utf8
LANGUAGE=en_US:
LC_CTYPE=UTF-8
LC_NUMERIC="en_US.utf8"
LC_TIME="en_US.utf8"
LC_COLLATE="en_US.utf8"
LC_MONETARY="en_US.utf8"
LC_MESSAGES="en_US.utf8"
LC_PAPER="en_US.utf8"
LC_NAME="en_US.utf8"
LC_ADDRESS="en_US.utf8"
LC_TELEPHONE="en_US.utf8"
LC_MEASUREMENT="en_US.utf8"
LC_IDENTIFICATION="en_US.utf8"
LC_ALL=

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04 LTS
Release:        14.04
Codename:       trusty

我正在尝试在"位置"列之后向现有的Postgres表添加一个新列"纬度".

使用此语法将列放在正确的位置:

add_column :table, :column, :decimal, :after => :existing_column

使用此语法可确保该字段是正确的数据类型

add_column :table, :column, :decimal, {:precision => 10, :scale => 6}

但是,当我尝试将两者结合起来时:

add_column :table, :column, :decimal, {:precision => 10, :scale => 6}, :after => :existing_column

我得到"ArgumentError:错误的参数数量(5为3..4)"

"不用担心",我想,"我只会把争论结合起来!":

add_column :table, :column, :decimal, {:precision => 10, :scale => 6, :after => :existing_column}

但是这些列出现在表的末尾.我究竟做错了什么？

谢谢 :)

我有两个模型:(
User电子邮件:字符串)
Profile(名称:字符串)

class User < ActiveRecord::Base
   has_one :profile   
   delegate :name, :name=, :to => :profile   
end

class Profile < ActiveRecord::Base
  belongs_to :user
end

rails c

u = User.new 
u.build_profile         #=> init Profile
u.name = 'foo'
u.email = 'some@ema.il'
u.save                  #=> both User and Profile are saved

u.name = 'bar'
u.save                  #=> true, but changes in Profile were not saved!

u.email = 'new@ema.il'
u.save                  #=> true, new User email was saved, Profile - still not!

u.name                  #=> 'bar', but …

我知道这类问题已经被问到了.

我使用s3gem将我的文件上传到s3存储桶中.但是在s3安装gem 之后,当我启动rails服务器时它会显示以下错误:

    /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223:in `class_eval': /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223: `@@{' is not allowed as a class variable name (SyntaxError)
/var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223: syntax error, unexpected $end
        unless defined? @@{:instance_writer=>true}
                          ^
    from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223:in `block in cattr_reader'
    from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:222:in `each'
    from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:222:in `cattr_reader'
    from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:258:in `cattr_accessor'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:155:in `<class:Store>'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:154:in `<module:Cache>'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:14:in `<module:ActiveSupport>'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:12:in `<top (required)>'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block in require'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
    from /var/lib/gems/1.9.1/gems/jbuilder-2.2.5/lib/jbuilder/jbuilder_template.rb:3:in `<top (required)>'
    from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
    from …

我正在尝试帮助调试项目。当我尝试运行服务器时，我遇到了一个非常奇怪的错误。我试图用谷歌搜索宝石，但没有运气。谁有想法？我试过bundle install和bundle update。

这是我尝试运行的实际代码块。

source 'https://rails-assets.org' do
  # Assets via Bower
  gem 'rails-assets-lodash', '~> 2.4'
  gem 'rails-assets-angular', '~> 1.2'
  gem 'rails-assets-angular-spree', '= 0.0.2'
end

错误：源不包含任何版本的 'rails-assets-lodash (~> 2.4) ruby​​' 运行bundle install以安装缺少的 gem。

如果我注释掉第一个 gem，我会在处理它时遇到类似的错误。当我注释掉这个块时它确实有效，但我被指示不要改变环境。

我在dir中找到了class AvatarUploader < Carrierwave::Uploader::Base哪些商店User头像public/uploads:

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  version :main do
     process :resize_to_limit => [128, 128]
  end

我想在production启用资源预编译的模式下启动应用程序.除了头像之外的一切都很好.当我访问任何User个人资料时,我得到:

Started GET "/users/1" for 127.0.0.1 at 2012-05-03 17:45:24 +0300
Processing by Users::UsersController#show as HTML
  Parameters: {"id"=>"1"}
  Rendered users/users/show.html.erb within layouts/application (2.5ms)
Completed 500 Internal Server Error in 16ms

ActionView::Template::Error ( isn't precompiled):
    87:                     <%= image_tag @user.avatar_url(:main).to_s %>
  app/views/users/users/show.html.erb:87:in `_app_views_users_users_show_html_erb___538221278131396366_28399560'

也许有一种方法可以关闭头像的预编译(因为它们可以在应用程序在生产中运行时重新上传).请提供有关如何解决此问题的任何建议.谢谢.

我正在尝试执行这行代码

key_inside = CGI::unescape(key)
val_inside = CGI::unescape(val)

它给我的错误就像

undefined method `tr' for :oauth_consumer_key:Symbol\n

我正在使用Rails 2.3.18和ruby 1.9.3

任何人都可以建议可能出现的问题吗？

我创建了新应用程序，但是由于屏幕截图错误（完整图片网址：http : //oi60.tinypic.com/xmqtr5.jpg），我无法运行服务器。

有任何想法吗？

我有一个Post模特.的Post可能是一个问题类型,应答或注释(类似于StackOverflow的结构).目前,控制器正在处理任何类型的CRUD请求 Post.有一个约定,控制器需要在Rails中很薄,而且我的控制器似乎不遵循这个,因为Post任何操作中的case语句(类型选择和处理).所以我的问题是:有没有办法重组或(甚至更好)划分Post控制器来处理Question,Answer并Comment单独使用,但使用共同的Post观点？任何链接/示例将不胜感激.