Question

虽然我在托盘中创建了类配方的新对象，但没有数据插入到方向模型表中。

食谱控制器：

class RecipesController < ApplicationController
    before_action :find_recipe, only:[:show, :edit, :update, :destroy]
    def index
        @recipe = Recipe.all.order("created_at DESC")
    end

    def show
    end

    def new
        @recipe = Recipe.new
    end

    def create
        @recipe = Recipe.new(recipe_params)

        if @recipe.save
            redirect_to @recipe, notice: "Dodano nowy przepis"
        else
            render 'new'
        end
    end

    def edit
    end

    def update
        if @recipe.update(recipe_params)
            redirect_to @recipe
        else
            render 'edit'
        end
    end

    def destroy
        @recipe.destroy
        redirect_to root_path, notice: "Przepis został usunięty"
    end



    private

    def recipe_params
        params.require(:recipe).permit(:tittle, :description, :image, :portion, :preparation_time, ingredients_attributes: [:id, :name, :_destroy], directions__attributes: [:id, :step, :_destroy], recipe_ingredients_attributes: [:id, :quantity, :_destroy])
    end

    def find_recipe
        @recipe = Recipe.find(params[:id])
    end



end

食谱模型：

class Recipe < ApplicationRecord
    has_many :directions, inverse_of: :recipe
    has_many :recipe_ingredients
    has_many :ingredients, through: :recipe_ingredients

    accepts_nested_attributes_for :ingredients,
                                    reject_if: proc { |attributes| attributes['name'].blank? },
                                    allow_destroy: true
    accepts_nested_attributes_for :directions,
                                    reject_if: proc { |attributes| attributes['step'].blank? },
                                    allow_destroy: true


    validates :tittle, :description, :image, presence: true
    has_attached_file :image, styles: { :medium => "400x400#" }
    validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/

end

方向模型：

class Direction < ApplicationRecord
  belongs_to :recipe, inverse_of: :directions
end

来自控制台的关于创建新Recipe对象的行：

Started PATCH "/recipes/5" for 127.0.0.1 at 2017-10-13 14:26:06 +0200
Processing by RecipesController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"h4Htdlybl6hiej2msXb5jlNz0Yngz3Mw2Trju9822FgPatUASvQx+it7m+p3WSBX9k7vjLOhJU3vhgtEFlvzIw==", "recipe"=>{"tittle"=>"Tosty", "description"=>"Testowy przepis", "preparation_time"=>"10.0", "portion"=>"2", "ingredients_attributes"=>{"0"=>{"name"=>"Chleb tostowy", "_destroy"=>"false", "id"=>"1"}, "1"=>{"name"=>"Ser zółty", "_destroy"=>"false", "id"=>"2"}, "2"=>{"name"=>"Cebula", "_destroy"=>"false", "id"=>"3"}}, "directions_attributes"=>{"1507897562367"=>{"step"=>"sdfsfd", "_destroy"=>"false"}, "1507897565151"=>{"step"=>"sdfsdfs", "_destroy"=>"false"}}}, "commit"=>"Update Recipe", "id"=>"5"}
  Recipe Load (0.2ms)  SELECT  "recipes".* FROM "recipes" WHERE "recipes"."id" = ? LIMIT ?  [["id", 5], ["LIMIT", 1]]
Unpermitted parameter: directions_attributes
   (0.1ms)  begin transaction
  Ingredient Load (1.7ms)  SELECT "ingredients".* FROM "ingredients" INNER JOIN "recipe_ingredients" ON "ingredients"."id" = "recipe_ingredients"."ingredient_id" WHERE "recipe_ingredients"."recipe_id" = ? AND "ingredients"."id" IN (1, 2, 3)  [["recipe_id", 5]]
   (0.5ms)  commit transaction
Redirected to http://localhost:3000/recipes/5
Completed 302 Found in 21ms (ActiveRecord: 2.6ms)

正如您在db查询字符串中看到的那样，方向属性没有id，这可能是主要原因。 Altough ...我不知道如何解决这个问题。

请帮助我解决这个问题很长一段时间。

Answer 1

这是因为Unpermitted parameter: directions_attributes。

directions__attributes删除强力参数中的额外_。

内部

def recipe_params
        params.require(:recipe).permit(:tittle, :description, :image, :portion, :preparation_time, ingredients_attributes: [:id, :name, :_destroy], directions__attributes: [:id, :step, :_destroy], recipe_ingredients_attributes: [:id, :quantity, :_destroy])
    end

更改为directions_attributes。它会起作用。

不写入表

1 个答案: