Rails:无效的单表继承类型错误 [英] Rails: Invalid single-table inheritance type error

问题描述

因此，我正在使用现有数据库迁移此 php 站点，我无法将其更改为 Rails.有一个表:Quotes，其中有一列名为 type.每当我尝试创建此模型并设置类型时，它都会告诉我以下错误:

So, I am working on migrating this php site with an existing database which I cannot change over to Rails. There is a table: Quotes with a column named type. Whenever I try and create a model of this and set the type, it tells me the following error:

ActiveRecord::SubclassNotFound(单表继承类型无效:HOME 不是 Quotes 的子类)

我不明白为什么它认为它是继承的，因为它不应该继承.我的创建方法如下所示:

I don't understand why it thinks its inheriting because it's not supposed to. My create method looks like this:

quote = Quotes.create(
  agent_id: agent.id,
  client_id: client.id,
  type: 'HOME',
  status: 0,
  date_created: DateTime.now 
)

如果我注释掉类型，一切正常.但是使用类型它会出错.

If I comment out the type, everything works fine. But with the Type it errors.

推荐答案

我通过将模型继承列设置为 nil 解决了这个问题.Active Record Models 可以通过属性 :type 从表继承，将inheritance_column 设置为 nil 会删除该属性，允许您拥有一个名为 type

I resolved this by setting the models inheritance_column to nil. Active Record Models can inherit from a table through the attribute :type, setting the inheritance_column to nil removes that attribute allowing you to have a database column named type

class Quote < ActiveRecord::Base
    self.inheritance_column = nil
end

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