问带有新父和子窗体的Rails模型验证

EN

Started POST "/cakes" for 127.0.0.1 at 2018-04-25 21:19:03 +0100
Processing by CakesController#create as JS
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"r6B2ult7w7z4vez95f2pNXmk7Q1rYSzj8Wi9VwnS4EgIAw8PG/w7isfAeiiSB9sY8+0+oHldMVpy1GFKBmrpmw==", "cake"=>{"name"=>"", "description"=>"", "cake_type_id"=>"", "cake_details_attributes"=>{"0"=>{"_destroy"=>"true", "price"=>""}, "1"=>{"_destroy"=>"true", "price"=>""}}}, "commit"=>"Create Cake"}
   (0.1ms)  begin transaction
   (0.1ms)  rollback transaction
  Rendering cakes/new.html.erb within layouts/application
  CakeType Load (0.3ms)  SELECT "cake_types".* FROM "cake_types"
  Rendered cakes/_form.html.erb (15.9ms)
  Rendered cakes/new.html.erb within layouts/application (19.6ms)
Completed 200 OK in 109ms (Views: 100.4ms | ActiveRecord: 0.5ms)

  <% if @cake.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(cake.errors.count, "error") %> prohibited this cake from being saved:</h2>
      <ul>
      <% @cake.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
  <% @cake.cake_details.each do |detail| %>
    <% if detail.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(cake.errors.count, "error") %> prohibited this cake from being saved:</h2>
      <ul>
      <% @cake.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
    <% end %>
  <% end %>

class Cake < ApplicationRecord
  validates :name, :description, :cake_type, presence: true

  belongs_to :cake_type
  has_many :cake_details, -> {order('size_id ASC')}, inverse_of: :cake
  has_many :sizes, through: :cake_details
  accepts_nested_attributes_for :cake_details, :allow_destroy => true

  validates_associated  :cake_type, :cake_details
end

  def create
    #@cake = Cake.new(params[cake:{}])
    #params.require(:cake).permit(:name, :description,:cake_type_id)

    @cake = Cake.new(cake_params)
    respond_to do |format|
      if @cake.save
        format.html { redirect_to @cake, notice: 'Cake was successfully created.' }
        format.json { render :show, status: :created, location: @cake }
      else
        format.html { render :new }
        format.json { render json: @cake.errors, status: :unprocessable_entity }
      end
    end
  end

def cake_only_params
  params.require(:cake).permit(:name, :description,:cake_type_id)
end

def cake_params
  params.require(:cake).permit(:name, :description,:cake_type_id, cake_type_id:[:type_id],
  cake_details_attributes:[:_destroy, :id, :cake_id, :size_id, :price])
end

<%= form_with(model: cake, local: true) do |form| %>

<%= form_with(model: @cake) do |form| %>