小编sau*_*kko的帖子

我正在尝试运行rails(4.1.2)控制台

rails c RAILS_ENV=test

我得到了这个:

> config.eager_load is set to nil. Please update your
> config/environments/*.rb files accordingly:
> 
>   * development - set it to false   * test - set it to false (unless
> you use a tool that preloads your test environment)   * production -
> set it to true
> 
> /Users/xxxxxx/.rvm/gems/ruby-2.2.2/gems/activerecord-4.1.12/lib/active_record/connection_adapters/connection_specification.rb:257:in
> `resolve_symbol_connection': 'RAILS_ENV=test' database is not
> configured. Available: ["development", "test", "production"]
> (ActiveRecord::AdapterNotSpecified)

然而,在我的test.rb我config.eager_load = false和我database.yml …

在heroku(heroku run console...)中运行控制台时出现以下错误.应用程序运行没有问题,但我似乎无法运行控制台,因为这和开发中我没有这个问题.

/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- test/unit/testcase (LoadError)
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/test_case.rb:1:in `<top (required)>'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/console/app.rb:2:in `<top (required)>'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:304:in `initialize_console'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:152:in `load_console'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:27:in `start'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:8:in `start'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require' …

我有这5个模型:卫报,学生,关系,关系类型和学校.在他们之间,我有这些联想

class Guardian < ActiveRecord::Base
  belongs_to :school
  has_many :relationships, :dependent => :destroy
  has_many :students, :through => :relationships
end

class Student < ActiveRecord::Base
  belongs_to :school
  has_many :relationships, :dependent => :destroy
  has_many :guardians, :through => :relationships
end

class Relationship < ActiveRecord::Base
  belongs_to :student
  belongs_to :guardian
  belongs_to :relationship_type
end

class School < ActiveRecord::Base
  has_many :guardians, :dependent => :destroy
  has_many :students, :dependent => :destroy
end

class RelationshipType < ActiveRecord::Base
  has_many :relationships
end

我想写一个定义关系的FactoryGirl.每个关系都必须有一个监护人和一个学生.这两个人必须属于同一所学校.监护人工厂与学校有联系,学生工厂也是如此.我一直无法让他们在同一所学校建造.我有以下代码:

FactoryGirl.define do

  factory :relationship do
    association :guardian
    association :student, :school => …

我有一个问题和两个包括它的类.在关注中,我定义了一个变量.这是关注和两个模型:

module UserInstance
  extend ActiveSupport::Concern

  included do

    ACTIVE = 'active'
  end
end

class Guardian < ActiveRecord::Base

  include UserInstance

end

class Student < ActiveRecord::Base

  include UserInstance

end

我收到这个警告:

/app/app/models/concerns/user_instance.rb:12: warning: already initialized constant UserInstance::ACTIVE
/app/app/models/concerns/user_instance.rb:12: warning: previous definition of ACTIVE was here

我想,一旦它加载一个类(如Guardian),它也加载常量,加载另一个类尝试再次加载常量,然后给出警告.如何在不必将常量放入两个模型的情况下避免这种情况？谢谢

如何使用.bash_profileReact应用程序中定义的环境变量？我在生产中有两个React应用程序(它们是相同的项目,因此它们具有相同的代码),但是它们需要请求不同的API主机,并且我认为env变量可以做到这一点.

有没有办法找出heroku web dyno使用了多少内存？假设我想写一个定期运行的rake任务并检查每个dyno的内存使用情况.我怎么能这样做？谢谢!

我想在API模式下使用Jbuilder和Rails 5.0.0.beta1.1.开箱即用,即使在创建app/views目录时它也不起作用.

例如,我有:

# app/controllers/tests_controller.rb
class TestsController < ApplicationController
  # The requests gets inside the action
  def test
  end
end

# app/views/tests/test.json.jbuilder
json.test "It works!"

我得到的错误是

No template found for TestsController#test, rendering head :no_content

我想我必须改变配置文件中的一些东西.我需要做什么？

自从我们更新到Rails 3.2.13以来,我们一直无法启动heroku rails控制台.服务器运行正常,但是当我们尝试运行控制台时,它会出现以下错误:

Loading production environment (Rails 3.2.13)
/app/vendor/bundle/ruby/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:212:in `const_missing_from_s3_library': uninitialized constant IRB::ReadlineInputMethod::Readline (NameError)
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/input-method.rb:113:in `gets'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:139:in `block (2 levels) in eval_input'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:273:in `signal_status'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:138:in `block in eval_input'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:188:in `call'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:188:in `buf_input'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:103:in `getc'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/slex.rb:205:in `match_io'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/slex.rb:75:in `match'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:286:in `token'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:262:in `lex'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:233:in `block (2 levels) in each_top_level_statement'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `loop'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `block in each_top_level_statement'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:228:in `catch'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:228:in `each_top_level_statement'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:155:in `eval_input'
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:70:in `block …

我正在使用Heroku + RedisToGo + Resque.我有一个正在运行非结束任务的工人.我想要记录它的活动.heroku logs --tail没有显示有关工人活动的任何信息.我怎样才能做到这一点？谢谢!

我在该eu-west-1地区有一个 S3 存储桶，我们称之为my-bucket.

在那个桶里有一张照片，我们称之为some-file.jpg。

如果我通过浏览器访问这两个 url，我可以检索该图片（存储桶中的所有对象都是公开的）（请记住，这些是示例，而不是现实生活中的 url）：

https://my-bucket.s3.amazonaws.com/some-file.jpg

https://s3-eu-west-1.amazonaws.com/my-bucket/some-file.jpg

但是，我正在尝试获取有关该图片的一些信息，为此我使用了 vibrity.js，它尝试检索该文件。

但是，当 url 为https://my-bucket.s3.amazonaws.com/some-file.jpg时它会失败，并出现以下 CORS 错误：

Access to Image at 'https://my-bucket.s3.amazonaws.com/some-file.jpg' from origin 'https://example.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://example.com' is therefore not allowed access

我已确保存储桶的 CORS 策略接受所有来源：

<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
    <AllowedOrigin>*</AllowedOrigin>
    <AllowedMethod>GET</AllowedMethod>
    <AllowedMethod>POST</AllowedMethod>
    <AllowedMethod>PUT</AllowedMethod>
    <MaxAgeSeconds>3000</MaxAgeSeconds>
    <AllowedHeader>*</AllowedHeader>
</CORSRule>
</CORSConfiguration>

我的猜测是https://s3-eu-west-1.amazonaws.com/my-bucket/some-file.jpg发送Access-Control-Allow-Origin而另一个没有。我该如何解决这个问题？