Rails 中的多态关联
如果我有一个属于多态关联（建议）的模型（选择），是否可以以选择的形式创建关联的建议？
本质上，我想做的是允许用户在民意调查中创建一个“选择”，潜在的建议是预定义的场地、城市或地区，而且还允许自定义自由格式建议的选项（仅文本） ，而不是我的数据库中存在的预定义实体）。对于场地/城市/地区，很简单，只需为用户提供一个选择选项并将选择与其关联，但是 CustomSuggestion 是否可以动态创建它并将选择与其关联？
我在想，我真正想要的是关联为 has_one CustomSuggestion，以允许关联构建，但这将是与 isn't_to :suggestion, :polymorphic => 不同的关联。真的。
有什么想法吗？
谢谢， 埃里克
If I have a model (Choice) belonging to a polymorphic association (Suggestion), is it possible to create the associated Suggestion in a form for the Choice?
Essentially, what I'm trying to do is allow a user to create a "Choice" in a poll, with potential suggestions being predefined Venues, Cities, or Districts, but also to allow an option for custom free-form suggestion (just text, and not a predefined entity existing in my database). For Venues/Cities/Districts, it's simple enough to just give the user a selection option and associate the Choice with it, but is it possible for a CustomSuggestion to create it on the fly and associate the Choice with it?
I was thinking that what I really want is the association to be has_one CustomSuggestion, to allow for association building, but then that would be a different association from the belongs_to :suggestion, :polymorphic => true.
Any ideas?
Thanks,
Eric
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我过去曾这样做过，并且没有为其复杂的对象模型所困扰。例如，在一份工作申请表中，我有一个“你是如何听说我们的问题？”如果您填写了该框，我会将其视为已填写的答案。因此，我有一个“belongs_to”指向正常选择，但只是模型上的一个文本字段用于自定义选择。
当有多个人提出相同的建议时，您的建议表会看起来很奇怪。一般来说，我质疑什么时候将某些东西建模为“has_one”。
I have done this in the past and I didn't bother with a complex object model for it. For example, in a job application form, I had a "how did you hear of us question?" If you filled in the box, I took that as a filled in answer. So, I had a "belongs_to" that pointed to the normal choices, but just a text field on the model for a custom one.
Your suggestions table is going to look weird when there are multiple people with the same suggestion. In general, I question when something is modeled as a "has_one".