Rails：爲什麼聯想價值無法保存？

我想保存schedule_id在amount模型。Rails：爲什麼聯想價值無法保存？

雖然我能救room_id，我無法保存schedule_id。沒有錯誤。

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"

型號\ 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

型號\ room.rb

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

型號\ 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

意見\時間表\ 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 %>

意見\時間表\ _schedule_form .html.erb

room_id可以保存，但是schedule_id不能保存。

<%= 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 %>

這將不勝感激，如果你能告訴我如何保存schedule_id。

UPDATE

後的日誌。

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)

來源

2016-08-28 SamuraiBlue

'f.fields_for（：房）做的| r |'對象** R **，但你使用** A **。 'a.hidden_field：schedule_id' – Emu

感謝您的評論，@Emu。我犯了錯字。儘管我使用'r'而不是'a'，結果是一樣的。如果你能給我建議，我將不勝感激。 – SamuraiBlue

當您提交表單時，在schedule_params中傳遞了哪些參數？如果你能檢查你能得到一個很好的見解。 – Emu

爲了挽救schedule_id在Amount模型，你需要手動設置scheudle_id值與一個回調。

class Amount < ActiveRecord::Base 
    belongs_to :room 
    belongs_to :schedule 

    before_save do 
    self.schedule_id = room.schedule_id 
    end 
end

這是因爲您使用的是Schedule形式，其rooms和屬於這個特定的房間amounts，但Amount無法通知的時間表，因爲不使用Schedule的直接關聯。

來源

2016-09-07 00:19:44

謝謝你的回答，@Alejandro Babio。有用！ – SamuraiBlue

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.

來源

2016-09-06 11:02:02 APS

Rails：爲什麼聯想價值無法保存？

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