产生输入ID与ActiveRecord模型 [英] Generating the input id with an ActiveRecord model

问题描述

你如何产生输入的 ID 属性，给定一个模式？举例来说，如果我有人物模型与 FIRST_NAME 属性，表单助手打印出这个文本框HTML：

How do you generate an input's id attribute, given a model? For example, if I have a model of Person with a first_name attribute, the form helper prints out a textbox with this html:

<input type="text" id="person_first_name" />

我怎么能生成 person_first_name 从code其他一些地方（如在一个控制器或某些地方）？

How can I generate that person_first_name from some other place in the code (like in a controller or some place)?

推荐答案

我结束了以下中微子的建议，并期待在轨codeA点点。最后我拉出一对夫妇在 InstanceTag 类的私有方法和移动起来一点点。我猴子修补这个到的ActiveRecord :: Base的，这可能不是最好的解决办法，但它现在：

I ended up following neutrino's advice and looked at the rails code a little bit more. I ended up pulling out a couple of private methods in the InstanceTag class and moving them around a little bit. I monkey patched this onto ActiveRecord::Base, which may not be the best solution, but it works right now:

def create_tag_id(method_name)
  object_name = ActionController::RecordIdentifier.singular_class_name(self)
  "#{sanitized_object_name(object_name)}_#{sanitized_method_name(method_name.to_s)}"
end

private
  def sanitized_object_name(object_name)
    object_name.gsub(/\]\[|[^-a-zA-Z0-9:.]/, "_").sub(/_$/, "")
  end

  def sanitized_method_name(method_name)
    method_name.sub(/\?$/,"")
  end

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