鐵軌生成腳手架失敗紅寶石1.9.3

Question

我只是在鐵軌發展中我的腳溼了。試圖從「Head First Rails」中學習，這已經過時了。但我正在更新命令以更現代化的Rails版本。

無論如何，我試圖用導軌支架產生命令，並運行到以下錯誤：

 [root@web1:/var/www/tickets] #rails generate scaffold name:string seat_id_seq:string address:text price_paid:decimal email_address:string 
     invoke active_record 
/usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/base.rb:258:in `const_defined?': wrong constant name Name:string (NameError) 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/base.rb:258:in `block in class_collisions' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/base.rb:249:in `each' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/base.rb:249:in `class_collisions' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators/named_base.rb:200:in `block in check_class_collision' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/command.rb:27:in `run' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `map' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:115:in `invoke' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:277:in `block in _invoke_for_class_method' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/shell.rb:68:in `with_padding' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:266:in `_invoke_for_class_method' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:149:in `_invoke_from_option_orm' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/command.rb:27:in `run' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `map' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/thor-0.19.1/lib/thor/base.rb:440:in `start' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/generators.rb:157:in `invoke' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/commands/generate.rb:11:in `<top (required)>' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block in require' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:135:in `generate_or_destroy' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:51:in `generate' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:40:in `run_command!' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/railties-4.1.5/lib/rails/commands.rb:17:in `<top (required)>' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block in require' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require' 
     from /var/www/tickets/bin/rails:8:in `<top (required)>' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:241:in `load' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:241:in `block in load' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency' 
     from /usr/local/rvm/gems/ruby-1.9.3-p547/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:241:in `load' 
     from /usr/local/rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:55:in `require' 
     from /usr/local/rvm/rubies/ruby-1.9.3-p547/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:55:in `require' 
     from -e:1:in `<main>' 

我通過RVM運行紅寶石1.9.3，並通過寶石導軌4。服務器是CentOS 7

我只是想知道你們中的任何一個人是否可能遇到過類似的情況，並知道我能如何克服這個錯誤。

謝謝！

Answer 1

Usage: 
    rails generate scaffold NAME [field[:type][:index] field[:type][:index]] [options] 

Examples: 
    `rails generate scaffold post` 
    `rails generate scaffold post title body:text published:boolean` 

你沒有指定name屬性，（即模型）