Question

我想将schedule_id保存在amount模型中。

虽然我可以保存room_id，但我无法保存schedule_id。没有错误。

schema.rb

  create_table "amounts", force: :cascade do |t|
    t.integer  "schedule_id"
    t.integer  "room_id"
    t.integer  "event_id"
    t.integer  "ccy"
    t.decimal  "amount"

模型\ schedule.rb

  has_many :rooms, inverse_of: :schedule, dependent: :destroy
  has_many :amounts, inverse_of: :schedule, dependent: :destroy
  accepts_nested_attributes_for :rooms, allow_destroy: true
  accepts_nested_attributes_for :amounts, allow_destroy: true

模型\ room.rb

  belongs_to :schedule, inverse_of: :rooms
  has_many :amounts, inverse_of: :room, dependent: :destroy
  accepts_nested_attributes_for :amounts, allow_destroy: true

模型\ amount.rb

  belongs_to :schedule, inverse_of: :amounts
  belongs_to :room, inverse_of: :amounts
  belongs_to :event, inverse_of: :amounts

schedules_controller.rb

  def new
    @schedule = Schedule.new
    room = @schedule.rooms.build
    room.amounts.build
  end

  def create
    @schedule = current_user.schedules.build(schedule_params)
    if @schedule.save
      flash[:success] = "schedule created!"
      redirect_to root_url
    else
      render 'new'
    end
  end

  private

    def schedule_params
      params.require(:schedule).permit(
        :title, :departure_date, 
        rooms_attributes: [
          :id, :_destroy, :room, :schedule_id, :day 
          amounts_attributes: [
            :id, :_destroy, :schedule_id, :room_id, :event_id, :ccy, :amount
          ]
        ]
      )
    end

视图\时间表\ new.html.erb

    <%= form_for(@schedule) do |f| %>
      <%= render 'shared/error_messages', object: f.object %>
      <%= render 'schedule_form', f: f %>
      <%= f.submit "Create my schedule", class: "btn btn-primary" %>
      <br>
    <% end %>

views \ schedules \ _schedule_form.html.erb

room_id可以保存，但schedule_id无法保存。

<%= f.fields_for(:rooms) do |r| %>
  <%= r.hidden_field :schedule_id %>
  <%= r.fields_for(:amounts) do |am| %>
    <%= am.hidden_field :schedule_id %>
    <%= am.hidden_field :room_id %>
  <% end %>
<% end %>

如果您能告诉我如何保存schedule_id，我们将不胜感激。

更新

发布日志。

Processing by SchedulesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"xxx", "schedule"=>{"title"=>"test", "departure_date"=>"2016-08-28", "rooms_attributes"=>{"0"=>{"schedule_id"=>"", "amounts_attributes"=>{"0"=>{"schedule_id"=>"", "room_id"=>""}}}}}, "commit"=>"Create my schedule"}
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"xxx", "schedule"=>{"title"=>"test", "departure_date"=>"2016-08-28", "rooms_attributes"=>{"0"=>{"schedule_id"=>"", "amounts_attributes"=>{"0"=>{"schedule_id"=>"", "room_id"=>""}}}}}, "commit"=>"Create my schedule"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
   (0.2ms)  BEGIN
   (0.2ms)  BEGIN
  SQL (7.0ms)  INSERT INTO "schedules" ("title", "departure_date", "user_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5) RETURNING "id"  [["title", "test"], ["departure_date", "2016-08-28"], ["user_id", 1], ["created_at", "2016-08-28 06:08:33.717879"], ["updated_at", "2016-08-28 06:08:33.717879"]]
  SQL (7.0ms)  INSERT INTO "schedules" ("title", "departure_date", "user_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5) RETURNING "id"  [["title", "test"], ["departure_date", "2016-08-28"], ["user_id", 1], ["created_at", "2016-08-28 06:08:33.717879"], ["updated_at", "2016-08-28 06:08:33.717879"]]
  SQL (0.7ms)  INSERT INTO "rooms" ("schedule_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["schedule_id", 85], ["created_at", "2016-08-28 06:08:33.727435"], ["updated_at", "2016-08-28 06:08:33.727435"]]
  SQL (0.7ms)  INSERT INTO "rooms" ("schedule_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["schedule_id", 85], ["created_at", "2016-08-28 06:08:33.727435"], ["updated_at", "2016-08-28 06:08:33.727435"]]
  SQL (0.4ms)  INSERT INTO "amounts" ("room_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["room_id", 105], ["created_at", "2016-08-28 06:08:33.730019"], ["updated_at", "2016-08-28 06:08:33.730019"]]
  SQL (0.4ms)  INSERT INTO "amounts" ("room_id", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id"  [["room_id", 105], ["created_at", "2016-08-28 06:08:33.730019"], ["updated_at", "2016-08-28 06:08:33.730019"]]
   (5.6ms)  COMMIT
   (5.6ms)  COMMIT
Redirected to https://xxx/schedules/85
Redirected to https://xxx/schedules/85
Completed 302 Found in 197ms (ActiveRecord: 14.2ms)
Completed 302 Found in 197ms (ActiveRecord: 14.2ms)

Answer 1

要在$ git --version git version 2.10.0模型中保存schedule_id，您需要通过回调手动设置Amount值。

scheudle_id

这是因为您使用class Amount < ActiveRecord::Base belongs_to :room belongs_to :schedule before_save do self.schedule_id = room.schedule_id end end表单及其Schedule和rooms属于此特定会议室，但amounts无效由于未使用与Amount的直接关联，因此会收到通知。

Answer 2

Remove reference keys from the private method,

      private
      def schedule_params
        params.require(:schedule).permit(
          :title, :departure_date, 
          rooms_attributes: [
           :day, 
            amounts_attributes: [
              :ccy, :amount
            ]
          ]
        )
      end

    Remove all hidden fields from view files.

Rails：为什么无法保存关联值？

2 个答案: