关于ruby on rails：ActiveModel :: UnknownAttributeError：事件的未知属性’creator_id’

ActiveModel::UnknownAttributeError: unknown attribute 'creator_id' for Event

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class User < ApplicationRecord
has_many :created_events, :foreign_key =>"creator_id", :class_name =>"Event"
end

class Event < ApplicationRecord
belongs_to :creator, :class_name =>"User"
end

当我尝试与创建者创建事件时，它说ActiveModel::UnknownAttributeError: unknown attribute 'creator_id' for Event.
我运行rails db:migrate，但仍然不会创建外键并添加到事件表中。我究竟做错了什么？我到处都看着。

$ rails db：migrate：status

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Status Migration ID Migration Name
--------------------------------------------------
up 20170625163737 Create users
up 20170625170905 Create events
up 20170625171959 Add description to event
up 20170625174531 Add creator id to events

但是，迁移文件显示未添加任何内容：

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class AddCreatorIdToEvents < ActiveRecord::Migration[5.1]
def change
end
end

相关讨论

您尚未正确定义关联。您的模型应如下所示：

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class User < ApplicationRecord
has_many :events, :foreign_key =>"creator_id", :class_name =>"Event"
end

class Event < ApplicationRecord
belongs_to :creator, :foreign_key =>"creator_id", :class_name =>"User"
end

也foreign_key始终存在于子表中。尝试如下创建事件。

正在考虑用户已经登录。

1	current_user.events.create(event_params)

请参阅此以获得与关联相关的帮助。