我使用friendly_id gem生成slu ..
我有这样的模型
class Veterinarian < ApplicationRecord
extend FriendlyId
belongs_to :user
has_one :profile, through: :user
friendly_id :slug_string, use: :slugged
def slug_string
"#{profile.first_name} #{profile.last_name} #{profile.city}"
end
end
另一个这样的模特。
class Profile < ApplicationRecord
include ReadOnlyModel
belongs_to :user
end
ReadOnlyModel看起来像这样
module ReadOnlyModel
extend ActiveSupport::Concern
included do
attr_readonly(*column_names)
end
def readonly?
true
end
def destroy
raise ActiveRecord::ReadOnlyRecord
end
def delete
raise ActiveRecord::ReadOnlyRecord
end
end
当我尝试访问兽医模型中的个人资料属性时，我的问题就来了。 profile.first_name，profile.last_name等
当friendly_id尝试更新slug时，它会抛出一个错误，告诉我配置文件模型是只读的，但是我只是访问一个属性并使用它创建一个字符串以供friendly_id使用，没有任何变化在配置文件模型中。但是我可以在控制台中执行Veterinarian.last.slug_string并且输出正确且没有错误。
我通过执行Veterinarian.update(slug: nil)将slug设置为nil并触发friendly_id以使用正确的slug更新它来测试它。
我一直在摸不着头脑，并且无法弄清楚发生了什么。它可能是我忽视的简单事物。任何帮助将不胜感激。
我的上述模型包含在Veterinarians模块中，出于可读性原因，我在代码示例中删除了它。
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答案 0 :(得分：0)
进一步挖掘后，似乎执行user.profile.attribute_name不会触发只读错误。