调试 RoR 语法错误

Question

我正在阅读一个教程，但在尝试将用户添加到我的数据库时，我发现了这个错误语句。我试图弄清楚如何正确阅读这些错误语句。例如，我看到输出显示语法错误，意外 tASSOC。期待keyword_end。因此，为了在此处发布之前尝试解决此问题，我在 user.rb 文件中注释掉了该行（该语句也指向该行）。但这没有用。我还添加了一个额外的“结束”，因为终端输出说“期待关键字结束”。

这是确切的终端输出：

   SyntaxError: /Users/zkidd/Sites/rails_projects/sample_app/app/models/user.rb:19: syntax error, unexpected tASSOC, expecting keyword_end
            :length => { :maximum => 50 }
                      ^
/Users/zkidd/Sites/rails_projects/sample_app/app/models/user.rb:23: syntax error, unexpected tASSOC, expecting $end
            :format => { :with => email_regex },
                      ^
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:454:in `load'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:454:in `block in load_file'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:453:in `load_file'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:340:in `require_or_load'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:491:in `load_missing_constant'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:183:in `block in const_missing'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:181:in `each'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:181:in `const_missing'
 from (irb):6
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/railties-3.0.1/lib/rails/commands/console.rb:44:in `start'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/railties-3.0.1/lib/rails/commands/console.rb:8:in `start'
 from /Users/zkidd/.rvm/gems/ruby-1.9.2-p0@rails3tutorial/gems/railties-3.0.1/lib/rails/commands.rb:23:in `<top (required)>'
 from script/rails:6:in `require'
 from script/rails:6:in `<main>'

这是我的 user.rb 文件：

    class User < ActiveRecord::Base
  attr_accessible :name, :email

  email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i

  validates :name, :presence => true
            :length => { :maximum => 50 }

  validates :email, :presence => true
            :format => { :with => email_regex },
            :uniqueness => { :case_sensitive => false }
end

任何指导都将不胜感激，因为我真的不想从一开始就重建这个东西:-)

Answer 1

您在 :presence => true 参数后缺少逗号：

class User < ActiveRecord::Base
  attr_accessible :name, :email

  email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i

  validates :name, :presence => true,
            :length => { :maximum => 50 }

  validates :email, :presense => true,
            :format => { :with => email_regex },
            :uniqueness => { :case_sensitive => false }
end

Answer 2

语法错误前的 2 行缺少逗号。