Rails嵌套表單創建錯誤的外鍵

Rails相當新穎，並且在這裏嘗試了許多沒有成功的事情。Rails嵌套表單創建錯誤的外鍵

我的問題是，當我發佈到這個嵌套的表格，我的表（apartment_images）與錯誤的外鍵（apartment_id）職位之一的數據庫。

我有一個相當複雜的模型關係：我有一個大廈 has_many_through它與聯營（等等）的公寓表中的另一表。有問題apartment_images表屬於公寓。

一個彙總版本低於：

建築模型

has_many :building_relationships 
has_many :apartments, :through => :building_relationships 
accepts_nested_attributes_for :apartments, allow_destroy: true

公寓型號

belongs_to :building 
has_many :apartment_images, -> { order(position: :asc) }, dependent: :destroy 
has_many :building_relationships 
has_many :buildings, :through => :building_relationships

ApartmentImage型號

belongs_to :apartment

buildings_controller（不含新方法）

def createNewBuilding 
    @building = Building.new(building_params) 
    @apartment = Apartment.where(building_id: @building.id) 
     #also tried this but results in no id being save: 
     #@apartment = @building.apartments.build(apartment_params) 

if @building.save 
     redirect_to newBuilding_path, notice: "Successfully created building" 
    else 
     render 'newBuilding'#, notice: "ERROR" 
    end 


    if apartment_image_params 
     apartment_image_params[:image].each do |value| 
     @apartment.apartment_images.build({image: value}).save 
      end 
    end 

    end 

def apartment_image_params 
     #also tried adding :apartment_id. didn't work. 
     params.require(:apartment_image).permit(:id, image: []) if params[:apartment_image] 
end

來源

2017-01-30 Noobprogrammer

我可能是誤會，但apartment_image外鍵_should_被apartment_id，因爲每個圖像屬於一個只有一間公寓，每間公寓可以有多個圖像。你能詳細說明你的問題嗎？ – jjk

基本上，當我點擊提交表單並檢查數據庫時，它會發布圖像或圖像，但會將其與錯誤的apartment_id關聯（即不是從表單中新創建的公寓） – Noobprogrammer

爲什麼您使用'has_many雖然：'建築與公寓之間的關係？當然，公寓不能在多個建築物？ – max

所以我終於搞定了。不完全理解爲什麼這與我正在做的工作相比，但是會閱讀它（但如果它們對你們來說是顯而易見的，我也是全部耳朵）。）。

的答案是從使用其中開關/發現/ findby語句來使用Rails魔法：

def createNewBuilding 
@building = Building.new(building_params) 
@apartments = @building.apartments 
@apartments.each do |apartments|

來源

2017-01-30 18:34:43 Noobprogrammer

Rails嵌套表單創建錯誤的外鍵

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