Rails:列出创建所需的属性 [英] Rails: List Required Attributes For Create

问题描述

我正在使用 Model.new(< attributes here>)在Rails控制台中手动创建对象.有没有一种简单的方法可以列出一个模型要求我包括哪些属性，以使 .save 调用成功?

I am manually creating objects in the rails console using Model.new(<attributes here>). Is there an easy way to list out which attributes a model will require me to include in order for the .save call to succeed?

我正在运行Rails 4.2.3

I am running rails 4.2.3

推荐答案

您可以使用 Model.validators 获得一组验证器.您必须以某种方式对此进行解析，以提取这些在场验证信息，例如:

You can get an array of validators using Model.validators. You'll have to parse this in some way to extract those validations for presence, something like:

presence_validated_attributes = Model.validators.map do |validator|
  validator.attributes if validator.is_a?(ActiveRecord::Validations::PresenceValidator)
end.compact.flatten

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