调试RoR语法错误

Question

我正在阅读一个教程，当试图将用户添加到我的数据库时，只是想出了这个错误语句。我试图找出如何正确阅读这些错误陈述。例如，我看到输出表示语法错误，意外的tASSOC。期待keyword_end。因此，为了在发布之前尝试解决这个问题，我在user.rb文件（语句指向的那个文件）中注释了该行。但那并不奏效。由于终端输出表示“期望keyword_end”，所以我还输入了一个额外的“结束”。

这里是确切的终端输出：

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>' 

这里是我的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，将不胜感激，因为我真的不知道想从头开始重建这件事:-)

Answer 1

你之后缺少一个逗号：存在=>真正的参数：

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

你在2行上有一些缺失的逗号pr导致语法错误。