Question

我有一个包含活动，用户，会谈和通知的应用程序。模型包括

用户模型

  has_many :talks, :dependent => :destroy
  has_many :notifications, :dependent => :destroy
  has_many :activities, :dependent => :destroy

通知模型

 has_many :users, -> {uniq}, through: :talks
  belongs_to :user
  belongs_to :trackable, polymorphic: true
  has_many :talks
  has_many :notifications

创建谈话时我会这样做

def create
    @activity = Activity.find(params[:activity_id])

    @talk = @activity.talks.create!(talk_params)
    @talk.user = current_user
    @talk.save

    #@users= @activity.users.where("id NOT IN (?)", [@activity.user.id, @talk.user])

    @users= User.joins(:talks).where(talks: {id:   @activity.talk_ids}).push(@activity.user).reject {|user| user == @talk.user }.uniq

    ## Lets create a notification for all those who created a comment in this activity
    @users.each do |user|
      Notification.create(activity:@activity, user: user)
    end
    ## Lets create a notification for the owner activity
    #Notification.create(activity:@activity, user: @activity.user)

    redirect_to user_path(current_user)

  end

并且通过此创建通知我想要的是显示通知所有者的名称..我不知道如何去做那个

Answer 1

试试这段代码：

@users.each do |user|
  noti = Notification.create(activity:@activity, user: user)
  notifications = @activity.user.notifications
  notifications << noti
  @activity.user.update(notifications:, notifications)
end

如果每个通知都有创建者（：用户），接收者（：用户），那么您需要有两列通知模型（sender_id，recipient_id）。

Facebook Notification

您需要阅读有关单表（User）

的继承

Inheritance from single table(1) Inheritance from single table(2)

显示在rails中拥有通知的用户

1 个答案: