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铁路和数据库一栏预设装置?
原标题:Rails and database column prefixes?

我正在开发一个大型的网络图象,我们的数据库图谱显示,大多数表格栏(即一栏是一大例外)都以缩略语标明。

我们想要把 app带到铁路,但根据铁路做法,似乎不应以这种方式预先确定一栏名称。

是否可以使用有一栏名的铁路? 我知道表格名称的序号得到了支持,但我看不出一栏名称。

任何铁路专家在座是否有任何想法?

最佳回答

确实,我看一看预设的栏目有任何问题(不过,它只是借用而已)。

不管怎么说,你有一个用户模型,有<条码>u_ 姓名/代码>,有<条码>。

冷静:User.first.name

而不是:User.first.u_name

为了实现这一点,我建议,你应当把这一未经测试的气象方案放在一个初步的准备者身上。

class ActiveRecord::Base
  def self.pretty_columns(prefix)
    skipped_columns = ["id"]       #add whatever column name you want here  
    columns.each do |column|
      column_name = column.name
      unless skipped_columns.include? column_name
        unprefixed_col = (column_name.scan /^#{prefix}(.*)/).flatten.first 

        define_method "#{unprefixed_col}" do
          self.send "#{column_name}"
        end

        define_method "#{unprefixed_col}=" do |value|
          self.send(column_name, value)
        end         
      end
    end
  end
end

接着, 用户模式:

class User < ActiveRecord::Base
  pretty_columns :u_
end
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