ActiveRecord :: Relation的未定义方法(嵌套属性) [英] Undefined Method for ActiveRecord::Relation (Nested Attributes)
本文介绍了ActiveRecord :: Relation的未定义方法(嵌套属性)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
未定义结果的方法'结果':: ActiveRecord_Relation:0x007f9ee69ad148>
undefined method `results' for Result::ActiveRecord_Relation:0x007f9ee69ad148>
Quantifieds#Index
第一行是导致异常的原因.
The first line here is what causes the exception.
<% @quantifieds.results.each do |result| %>
<%= result.date_value.strftime("%m-%Y") %>
<%= result.result_value %>
<% end %>
要重述该问题，如何定义date_value& result_value，以便它在量化索引中起作用吗?它们来自_form中的:results.我正在使用 茧 创建嵌套属性.
To restate the question, how do I define date_value & result_value so it works in the quantifieds index? They are derived from :results in the _form. I am using cocoon to create the nested attributes.
整个索引(已根据第一答案"更新)
Entire Index (Updated According to First Answer Response)
<!-- Default bootstrap panel contents -->
<div id="values" class="panel panel-default">
<div class="panel-heading"><h4><b>AVERAGE</b></h4></div>
<!-- Table -->
<table>
<% @averaged_quantifieds.each do |averaged| %>
<% if averaged.user == current_user %>
<th class="value">
<%= link_to edit_quantified_path(averaged) do %>
<%= averaged.name %>
<% end %>
(<%= averaged.metric %>)
</th>
<tbody class="value">
<% @quantified.each do |quantify| %>
<% quantify.results.each do |result| %>
<%= result.date_value.strftime("%m-%Y") %>
<%= result.result_value %>
<% end %>
<% end %>
</tbody>
<% end %>
<% end %>
</table>
</div>
<br>
<br>
<br>
<br>
<!-- Default bootstrap panel contents -->
<div id="values" class="panel panel-default">
<div class="panel-heading"><h4><b>INSTANCE</b></h4></div>
<!-- Table -->
<table>
<% @instance_quantifieds.each do |instance| %>
<% if instance.user == current_user %>
<th class="value">
<%= link_to edit_quantified_path(instance) do %>
<%= instance.name %>
<% end %>
(<%= instance.metric %>)
</th>
<tbody class="value">
<% @quantified.each do |quantify| %>
<% quantify.results.each do |result| %>
<%= result.date_value.strftime("%m-%Y") %>
<%= result.result_value %>
<% end %>
<% end %>
</tbody>
<% end %>
<% end %>
</table>
</div>
<div class="values-button">
<%= link_to new_quantified_path, class: 'btn' do %>
<b><span class="glyphicon glyphicon-plus"</span></b>
<% end %>
</div>
<%= form_for @quantified do |f| %>
<%= f.select :categories, Quantified::CATEGORIES %>
<%= f.text_field :name, class: 'form-control', placeholder: 'Enter Name' %>
<%= f.text_field :metric, class: 'form-control', placeholder: 'Enter Metric' %>
<%= f.fields_for :results do |result| %>
<%= render 'result_fields', :f => result %>
<% end %>
<%= link_to_add_association 'add result', f, :results %>
<%= f.submit %>
<% end %>
<div class="nested-fields">
<%= f.text_field :result_value, class: 'form-control', placeholder: 'Enter Result' %>
<%= f.date_select :date_value, :order => [:month, :year], class: 'date-select' %>
<%= link_to_remove_association "Remove Result", f %>
</div>
我需要更改控制器中的任何内容吗?
Do I need to alter anything in the controller?
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.将不胜感激！
附加码-附加码-附加码-附加码-附加码-附加码 这是我认为您不需要解决此问题的代码.
EXTRA CODE - EXTRA CODE - EXTRA CODE - EXTRA CODE - EXTRA CODE - EXTRA CODE This is code I don't think you need to solve the question.
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 < ActiveRecord::Base
belongs_to :user
scope :averaged, -> { 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
activerecord (4.2.0.rc3) lib/active_record/relation/delegation.rb:136:in `method_missing'
activerecord (4.2.0.rc3) lib/active_record/relation/delegation.rb:99:in `method_missing'
app/views/quantifieds/index.html.erb:18:in `block in _app_views_quantifieds_index_html_erb__3823335262543476951_70160225385540'
activerecord (4.2.0.rc3) lib/active_record/relation/delegation.rb:46:in `each'
activerecord (4.2.0.rc3) lib/active_record/relation/delegation.rb:46:in `each'
app/views/quantifieds/index.html.erb:9:in `_app_views_quantifieds_index_html_erb__3823335262543476951_70160225385540'
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actionpack (4.2.0.rc3) lib/action_controller/metal/instrumentation.rb:41:in `block (2 levels) in render'
activesupport (4.2.0.rc3) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
/Users/galli01anthony/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/benchmark.rb:294:in `realtime'
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activerecord (4.2.0.rc3) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'
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/Users/galli01anthony/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
/Users/galli01anthony/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
/Users/galli01anthony/.rvm/rubies/ruby-2.1.3/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'
推荐答案
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，但是您像限定数组一样使用它. 您应该已经写了一些东西:
Your instance variable @quantified is an array of results but you are using it like an array of qualified. You should have written something along the line:
@quantifieds = Quantified.joins(:results).all
然后您可以浏览您的量化数组，例如:
and then you can browse your quantified array such as:
@quantified.each do |quantify|
quantify.results.each do |result|
# Actual code
end
end
这篇关于ActiveRecord :: Relation的未定义方法(嵌套属性)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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