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为什么采用“新”方法可以挽救我的关系,而不是仅仅开始这样做。
原标题:Why does a "new" method saves my relation instead of just initializing it

我有一个顾问模式,其一面与简介模式有关,在我的控制人员中,我有一个带有以下代码的简介页:

@advisor = Advisor.includes(:profile).find(current_advisor_user.id)
@advisor.profile ||= AdvisorProfile.new

在装上这一简介页时,它为简介在数据库中创下了记录,不过,我只是想先入,这样,它就不是我的。

最佳回答

为此,

@advisor.build_profile

它将归还“一个相关类型的新物体,该物体与属性交织在一起,通过外国钥匙与该物体连接,但尚未得到保存”。 见

问题回答

我想你希望@advisor.build_profile

http://api.rubyon seas.org/states/ activeReDocument/Afraations/CsMethods.html

association=(associate) — Assigns the associate object, extracts the primary key, sets it as the foreign key, and saves the associate object.

build_association(attributes = {}) — Returns a new object of the associated type that has been instantiated with attributes and linked to this object through a foreign key, but has not yet been saved.





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