使用Mailboxer时如何添加depentent：:destroy

Question

如何在user.rb中添加depentent：:destroy来销毁使用mailboxer创建的用户之间的消息？

我有这些表和列。

mailboxer_conversations

id | subject | created_at | updated_at

mailboxer_notifications

id |类型| body | subject | sender_id | sender_type | conversation_id |草稿| notification_code | notified_object_id | notified_object_type |附件| updated_at | created_at |全局| expires | sender_name

mailboxer_receipts

id | receiver_id | receiver_type | notification_id | is_read |垃圾桶|已删除| mailbox_type | created_at | updated_at

我做到了

(user.rb)

has_many :messages, :class_name => "Mailboxer::Message", :as => :sender
        has_many :receipts, -> { order(:created_at => :desc, :id => :desc) }, :class_name => "Mailboxer::Receipt", dependent: :destroy, as: :receiver

has_many :notifications, -> { where( notified_object_type: 'Assignment') },
        foreign_key: "notified_object_id", dependent: :destroy,
        class_name: "Mailboxer::Notification"

但它并没有起作用。

Answer 1

您必须在关联的belongs_to部分使用dependent: :destroy。

所以用户has_many :notifications，在通知模型中应该是belongs_to :user, dependent: :destroy

因为现在它说，如果有人删除了通知，用户也将被销毁。