创建动作，habtm 关系

Question

我需要帮助这是配方模型：

class Recipe < ActiveRecord::Base

  mount_uploader :cover, AvatarUploader
  belongs_to :user

  has_and_belongs_to_many :ingredients,:join_table => 

"ingredients_recipes"

  accepts_nested_attributes_for :ingredients

end

这是成分模型

class Ingredient < ActiveRecord::Base
  has_and_belongs_to_many :recipes,:join_table => "ingredients_recipes"
end

我卡在创作动作中了

def create
    #@ingredient = Ingredient.find(params[:ingredients][:id])

    @ingredients = Ingredient.where(:id => params[:recipe][:ingredients])
    @recipe = Recipe.new(params.require(:recipe).permit(:name,:instructions,:cover,:user_id,:ingredients))
    #params[:ingredients].each_pair do |k,v|
    @recipe.ingredients << @ingredients
    #end
    #@recipe = current_user.recipes.new(params.require(:recipe).permit(:name,:instructions,:cover,:user_id, ingredients: [:id, :title] ))
    @recipe.cover = params[:cover]
    #@recipe.user_id = current_user.id
    @recipe.save
    render 'show', status: 201
  end

url 来自前端 (Angularjs) 看起来像这样：

{"recipe":{"name":"hdfndhs","instructions":"lsls,dndcj","ingredients":[{"id":2,"title":"oeuf"}]}}

Answer 1

我猜你的问题是你无法正确回答 @ingredients。

请尝试使用此代码获取 @ingredients:

@ingredients = Ingredient.where(:id => params[:recipe][:ingredients].map {|ingredient| ingredient[:id]})

创建动作，habtm 关系

create action,habtm relation

ruby-on-rails

has-and-belongs-to-many

angularjs