Ruby on rails `阻塞<；顶部（必需）>'；：未初始化常量Zillow（NameError）

我正试图在我的应用程序中复制Zillow实现的一个版本，但却得到了一个

块：未初始化的常量Zillow（NameError）

，它甚至禁止我启动服务器

我的

config/initializers/zillow_api.rb

中有以下内容：

Rails.application.config.to_prepare do
  Zillow::Api::Client.config.api_key = Rails.application.secrets.zillow_api_key
end

这在

lib/zillow/api/client.rb中（与示例应用程序中一样）：

结束

当我尝试启动服务器时，服务器输出如下：

/Users/lizbayardelle/Dropbox/Code/OCR/config/initializers/zillow_api.rb:5:in `block in <top (required)>': uninitialized constant Zillow (NameError)
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:446:in `instance_exec'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:446:in `block in make_lambda'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:192:in `block in simple'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:504:in `block in call'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:504:in `each'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:504:in `call'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:778:in `_run_prepare_callbacks'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:81:in `run_callbacks'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/actionpack-4.2.6/lib/action_dispatch/middleware/reloader.rb:83:in `prepare!'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/actionpack-4.2.6/lib/action_dispatch/middleware/reloader.rb:55:in `prepare!'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/application/finisher.rb:50:in `block in <module:Finisher>'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `call'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config/environment.rb:5:in `<top (required)>'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config.ru:3:in `block in <main>'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:55:in `instance_eval'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:55:in `initialize'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config.ru:in `new'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config.ru:in `<main>'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:49:in `eval'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:49:in `new_from_string'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:40:in `parse_file'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:299:in `build_app_and_options_from_config'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:208:in `app'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:61:in `app'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:336:in `wrapped_app'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:139:in `log_to_stdout'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:78:in `start'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
    from bin/rails:9:in `require'
    from bin/rails:9:in `<main>'

/Users/lizbayardelle/Dropbox/code/OCR/config/initializers/zillow_api.rb:5:in'block-in'：未初始化常量zillow（NameError）
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:446:in'instance\u exec'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:446:in'block in make\u lambda'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:192:在“简单块”中
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u-support/callbacks.rb:504:in'block in call'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:504:in'each'
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:504:in'call'
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u-support/callbacks.rb:92:in`\u运行\u callbacks\u'
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:778:in `\u run\u prepare\u callbacks'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active\u support/callbacks.rb:81:in'run\u callbacks'
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/actionpack-4.2.6/lib/action\u dispatch/middleware/reloader.rb:83:in“prepare！”
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/actionpack-4.2.6/lib/action\u dispatch/middleware/reloader.rb:55:in'prepare！'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/application/finisher.rb:50:in'block in'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:30:in'instance_exec'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:30:in'run'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:55:“运行中的块初始化器”
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:228:in'block in tsort_each'
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:350:在每个强连接的组件中的“块（2个级别）”中
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:431:在“每个强连接的组件”中
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:349:in“每个强连接组件中的块”
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in'each'
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in'call'
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:“每个强连接的组件”
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:226:in'tsort_each'
from/Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:205:in'tsort_each'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:54:in'run_initializers'
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/application.rb:352:in'initialize！'
来自/Users/lizbayardelle/Dropbox/Code/OCR/config/environment.rb:5:in`'
from/Users/lizbayardelle/Dropbox/Code/OCR/config.ru:3:in'block in'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:55:in'instance_eval'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:55:在“初始化”中
from/Users/lizbayardelle/Dropbox/Code/OCR/config.ru:in'new'
from/Users/lizbayardelle/Dropbox/Code/OCR/config.ru:in`'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:49:in'eval'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:49:in'new_from_string'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:40:in'parse_file'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:299:in'build_app_和_options_from_config'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:208:in'app'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:61:in'app'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:336:in'wrapp'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:139:in'log_to_stdout'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:78:in'start'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:在“服务器中的块”中
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in'tap'
from/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:在“服务器”中
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands\u tasks.rb:39:in“run\u command！”
来自/Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands.rb:17:in`'
从箱子/轨道：9:in“require”
从bin/ra
begin
  now = Time.now.to_f
  @results  = Zillow::Api::Client.get_search_results params.slice(:address, :citystatezip)
  @results  = [ @results ] unless @results.is_a?(Array)
  @duration = ( Time.now.to_f - now ).round(2)
rescue Zillow::Api::Exception::ZillowError => e
  @exception = e
end

/Users/lizbayardelle/Dropbox/Code/OCR/config/initializers/zillow_api.rb:5:in `block in <top (required)>': uninitialized constant Zillow (NameError)
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:446:in `instance_exec'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:446:in `block in make_lambda'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:192:in `block in simple'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:504:in `block in call'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:504:in `each'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:504:in `call'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:778:in `_run_prepare_callbacks'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/activesupport-4.2.6/lib/active_support/callbacks.rb:81:in `run_callbacks'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/actionpack-4.2.6/lib/action_dispatch/middleware/reloader.rb:83:in `prepare!'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/actionpack-4.2.6/lib/action_dispatch/middleware/reloader.rb:55:in `prepare!'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/application/finisher.rb:50:in `block in <module:Finisher>'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `call'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
    from /Users/lizbayardelle/.rvm/rubies/ruby-2.3.3/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config/environment.rb:5:in `<top (required)>'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config.ru:3:in `block in <main>'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:55:in `instance_eval'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:55:in `initialize'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config.ru:in `new'
    from /Users/lizbayardelle/Dropbox/Code/OCR/config.ru:in `<main>'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:49:in `eval'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:49:in `new_from_string'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/builder.rb:40:in `parse_file'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:299:in `build_app_and_options_from_config'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:208:in `app'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:61:in `app'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/rack-1.6.5/lib/rack/server.rb:336:in `wrapped_app'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:139:in `log_to_stdout'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/server.rb:78:in `start'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/lizbayardelle/.rvm/gems/ruby-2.3.3/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
    from bin/rails:9:in `require'
    from bin/rails:9:in `<main>'

config.autoload_paths += Dir["#{config.root}/lib/**/"]