即使存在未设置为 true，Rails 验证也需要数字 [英] Rails validation required numericality even though presence is not set to true

问题描述

我正在尝试保存没有一个字段集的记录——它在模型中具有验证数字.即使验证中不需要存在，它仍然会抛出该字段不是数字的错误.

I'm trying to save a record which doesn't have one field set -- which has a validate numericality in the models. Even though the presence is not required in the validation, it's still throwing an error that the field is not a number.

验证:

validates :network_id,    :numericality => true

保存模型的代码:

networks.each do |network|
  network.url = network.raw_data.link
  network.save!
end

错误:

Validation failed: Network is not a number

推荐答案

validates :network_id, :numericality => true, :allow_nil => true

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