ActiveRecord :: Relation（嵌套属性）的未定义方法
结果:: ActiveRecord_Relation的未定义方法`results’：0x007f9ee69ad148>
Quantifieds＃指数
这里的第一行是导致exception的原因。
要重述这个问题，我如何定义date_value和result_value以使其在quantieds索引中起作用？ 它们来源于：_form中的结果。 我正在使用cocoon来创建嵌套属性。
整个索引 （根据第一个答复响应更新）
AVERAGE
()
INSTANCE
()
result %>
[:month, :year], class: 'date-select' %>
我需要更改控制器中的任何内容吗？
class QuantifiedsController < ApplicationController before_action :set_quantified, only: [:show, :edit, :update, :destroy] before_action :authenticate_user!, except: [:index, :show] def index @quantifieds = Quantified.joins(:results).all @averaged_quantifieds = current_user.quantifieds.averaged @instance_quantifieds = current_user.quantifieds.instance end def show end def new @quantified = current_user.quantifieds.build end def edit end def create @quantified = current_user.quantifieds.build(quantified_params) if @quantified.save redirect_to quantifieds_url, notice: 'Quantified was successfully created' else render action: 'new' end end def update if @quantified.update(quantified_params) redirect_to quantifieds_url, notice: 'Goal was successfully updated' else render action: 'edit' end end def destroy @quantified.destroy redirect_to quantifieds_url end private def set_quantified @quantified = Quantified.find(params[:id]) end def correct_user @quantified = current_user.quantifieds.find_by(id: params[:id]) redirect_to quantifieds_path, notice: "Not authorized to edit this goal" if @quantified.nil? end def quantified_params params.require(:quantified).permit(:categories, :name, :metric, :result, :date, results_attributes: [:id, :result_value, :date_value, :_destroy]) end end
在此先感谢您的帮助。 非常感谢！
附加代码 – 附加代码 – 附加代码 – 附加代码 – 附加代码 – 附加代码这是我认为您无需解决问题的代码。
schema.rb
ActiveRecord::Schema.define(version: 20150123210404) do create_table "quantifieds", force: true do |t| t.string "categories" t.string "name" t.string "metric" t.datetime "created_at", null: false t.datetime "updated_at", null: false t.integer "user_id" end add_index "quantifieds", ["categories"], name: "index_quantifieds_on_categories" add_index "quantifieds", ["user_id"], name: "index_quantifieds_on_user_id" create_table "results", force: true do |t| t.string "result_value" t.date "date_value" t.integer "quantified_id" t.datetime "created_at", null: false t.datetime "updated_at", null: false t.integer "user_id" end add_index "results", ["date_value"], name: "index_results_on_date_value" add_index "results", ["user_id"], name: "index_results_on_user_id" create_table "users", force: true do |t| t.string "email", default: "", null: false t.string "encrypted_password", default: "", null: false t.string "reset_password_token" t.datetime "reset_password_sent_at" t.datetime "remember_created_at" t.integer "sign_in_count", default: 0, null: false t.datetime "current_sign_in_at" t.datetime "last_sign_in_at" t.string "current_sign_in_ip" t.string "last_sign_in_ip" t.datetime "created_at" t.datetime "updated_at" t.string "name" end add_index "users", ["email"], name: "index_users_on_email", unique: true add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
_create_results.rb
class CreateResults < ActiveRecord::Migration def change create_table :results do |t| t.string :result_value t.date :date_value t.belongs_to :quantified, index: true t.timestamps null: false end add_foreign_key :results, :quantifieds end end
_add_user_id_to_results.rb
class AddUserIdToResults < ActiveRecord::Migration def change add_column :results, :user_id, :integer add_index :results, :user_id end end
quantified.rb
class Quantified { where(categories: 'averaged') } scope :instance, -> { where(categories: 'instance') } has_many :results accepts_nested_attributes_for :results, :reject_if => :all_blank, :allow_destroy => true CATEGORIES = ['averaged', 'instance'] end
result.rb
class Result < ActiveRecord::Base belongs_to :user belongs_to :quantified end
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def index @quantifieds = Result.order("date_value").all @averaged_quantifieds = current_user.quantifieds.averaged @instance_quantifieds = current_user.quantifieds.instance end
您的实例变量@quantified是一个结果数组，但您正在使用它像一个限定数组。 你应该写一些东西：
@quantifieds = Quantified.joins(:results).all
然后你可以浏览你的量化数组，例如：
@quantified.each do |quantify| quantify.results.each do |result| # Actual code end end