Mongoid自定义安装程序/吸气剂和超级 [英] Mongoid custom setters / getters and super

问题描述

我试图修改属性Mongoid模型上的设置器，但与ActiveRecord不同，我无法调用super来让Mongoid实际设置属性，因为该模型使用的是include Mongoid::Document而不是ActiveRecord::Base的子类.

I'm trying to modify a setter on an attribute Mongoid model, but unlike ActiveRecord, I cannot call super to have Mongoid actually set the attribute, as the model is using include Mongoid::Document rather than a subclass of ActiveRecord::Base.

我希望能够做这样的事情.

I want to be able to do something like this.

class User
    include Mongoid::Document

    embeds_one :email_account

    def email_account=(_email_account)
        ret = super
        puts "email account updated!"
        do_something
        ret
    end
end

除了不是它的子类，它会产生

except, as its not a subclass, yields

NoMethodError: super: no superclass method

想法?

您将如何做吸气剂，如

class User
    include Mongoid::Document

    embeds_one :email_address

    def email_address
        super || "[e-mail]"
    end
end

推荐答案

如果它是嵌入式文档，则可以执行以下操作:

If its an embedded document you can do something on the lines of:

def doc=(_doc)
  self.build_doc(_doc.attributes)
end

我已经在控制台中尝试过了，但是没有尝试保存并取回它.如果父项是新记录，则保存应该没有问题，否则，您可能必须研究如何在嵌入式文档中调用保存.

I have tried it in console but didn't tried saving and retrieving it back. If parent is a new record save should be trouble-less, otherwise you might have to look into how to call save on embedded document.

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