Question

我目前正在向heroku部署rails应用程序。该应用程序是rails 2.3.3，由于某种原因可能因为它不同的ruby我没有得到一个奇怪的语法错误

这是我的错误

Downloading postal codes.
rake aborted!
/app/app/models/postal_code.rb:13: syntax error, unexpected ':', expecting keyword_then or ',' or ';' or '\n'
      when Integer: first(:conditions => { :code => code })
                   ^
/app/app/models/postal_code.rb:14: syntax error, unexpected keyword_when, expecting keyword_end
      when Hash: first(:conditions => {...
          ^
/app/app/models/postal_code.rb:59: syntax error, unexpected keyword_end, expecting $end

这是我的代码文件（postal_code.rb）

11  def self.get(code)
12   case code
13    when Integer: first(:conditions => { :code => code })
14    when Hash: first(:conditions => { :city => code[:city], :state => code[:state] })
15    else raise InternalException.new("Invalid input.")
16    end
17  end


51    # now set min and max lat and long accordingly
52    area[:min_lat] = latitude - area[:lat_degrees]
53    area[:max_lat] = latitude + area[:lat_degrees]
54    area[:min_lon] = longitude - area[:lon_degrees]
55    area[:max_lon] = longitude + area[:lon_degrees]    
56      
57    area  
58  end

任何想法是什么出错？

Answer 1

来自1.9.1 NEWS文件：

* Deprecated syntax
      o colon (:) instead of "then" in if/unless or case expression.

因此，您不能再使用带有case的冒号。您可以使用then：

case code
  when Integer then first(:conditions => { :code => code })
  when Hash    then first(:conditions => { :city => code[:city], :state => code[:state] })
  else raise InternalException.new("Invalid input.")
end

或换行：

case code
  when Integer
    first(:conditions => { :code => code })
  when Hash
    first(:conditions => { :city => code[:city], :state => code[:state] })
  else
    raise InternalException.new("Invalid input.")
end

Answer 2

这应该有效：

def self.get(code)
 case code
  when Integer then first(:conditions => { :code => code })
  when Hash then first(:conditions => { :city => code[:city], :state => code[:state] })
  else raise InternalException.new("Invalid input.")
  end
end

Ruby 1.9.1语法错误

2 个答案: