Question

我正在尝试根据请求模型创建一个遭遇记录。我想要的是after_update：create_encounter仅在我尝试为其创建before_update：check_changes的请求记录中有任何更改时才起作用，但是我无法弄清楚如何实现check_changes函数以查看是否存在任何更改请求记录中的更改。请帮助

record.rb

create_table "requests", force: :cascade do |t|

    t.string "applicant_name"
    t.string "pickup_location"
    t.string "notes"

end

请求模式

def create_encounter
    if self.changed?
       hello = Encounter.new
       hello.request_id = self.id
       hello.status_change_date = DateTime.now.to_date
       hello.notes = self.notes
       hello.save
    end
  end

添加

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: yellow;
}

.container {
  background-color: blue;
  width: 95vw;
  margin: 0 2.5vw;
  height: 50px;
}

.top-nav {
  background: green;
  opacity: 0.9;
  position: fixed;
  top: 0;
  left: 2.5vw;
  width: 95vw;
  height: 30px;
}

Answer 1

您可以使用ActiveRecord::AttributeMethods::Dirty中的saved_changes?()，它会告诉您对save的最后一次调用是否包含任何更改。

Answer 2

您必须在保存之前致电：create_encounter。

Answer 3

class Request < ApplicationRecord
  before_save :create_encounter
  after_create :create_encounters
  belongs_to :clinic
  belongs_to :client
  has_many :encounters, dependent: :destroy

  def create_encounter
    if self.changed?()
      hello = Encounter.new
      hello.request_id = self.id
      hello.admin_id = current_admin_id
      hello.status_change_date = DateTime.now.to_date
      hello.notes = self.notes
      hello.save
    end
  end

  def create_encounters
    hello = Encounter.new
    hello.request_id = self.id
    hello.admin_id = current_admin_id
    hello.status_change_date = DateTime.now.to_date
    hello.notes = self.notes
    hello.save
  end  

  def current_admin_id
    Admin.current_admin.try(:id)
  end

end

如果记录中有任何更改，请运行一个函数

3 个答案: