How to show nested database - ruby-on-rails

Question

Hello I have a nested database "processing" which belongst to "shopping_process". However I want somehow to see the messages, which are saved in processing. How can I do that? If I go to http://localhost:3000/processings/index the Error: Couldn't find Processing with 'id'=index appears. Has somebody an idea?
processings_controller.rb
class ProcessingsController < ApplicationController
before_action :set_processing, only: [:show, :edit, :update, :destroy]
# GET /processings
# GET /processings.json
def index
#processings = Processing.all
end
# GET /processings/1
# GET /processings/1.json
def show
end
# GET /processings/new
def new
#processing = Processing.new
end
# GET /processings/1/edit
def edit
end
# POST /processings
# POST /processings.json
def create
#processing = Processing.new(processing_params)
respond_to do |format|
if #processing.save
format.html { redirect_to #processing, notice: 'Processing was successfully created.' }
format.json { render :show, status: :created, location: #processing }
else
format.html { render :new }
format.json { render json: #processing.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /processings/1
# PATCH/PUT /processings/1.json
def update
respond_to do |format|
if #processing.update(processing_params)
format.html { redirect_to #processing, notice: 'Processing was successfully updated.' }
format.json { render :show, status: :ok, location: #processing }
else
format.html { render :edit }
format.json { render json: #processing.errors, status: :unprocessable_entity }
end
end
end
# DELETE /processings/1
# DELETE /processings/1.json
def destroy
#processing.destroy
respond_to do |format|
format.html { redirect_to processings_url, notice: 'Processing was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_processing
#processing = Processing.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def processing_params
params.require(:processing).permit(:shopping_process_id, :shopping_list_id, :accepted, :responded, :message)
end
end
view/processings/index.html.erb
<p id="notice"><%= notice %></p>
<h1>Processings</h1>
<table>
<thead>
<tr>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% #Processing.all.each do |processing| %>
<tr>
<td><%= link_to 'Show', processing %></td>
<td><%= link_to 'Edit', edit_processing_path(processing) %></td>
<td><%= link_to 'Destroy', processing, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
<br>
<%= link_to 'New Processing', new_processing_path %>
models/processing.rb
class Processing < ApplicationRecord
# db associations
belongs_to :shopping_process
belongs_to :shopping_list
# validations
validates :shopping_list, :presence => true
end
Now here comes the code for the database "shopping_processes"
shopping_processes_controller.rb
class ShoppingProcessesController < ApplicationController
load_and_authorize_resource
layout 'shopping_process', only: [:shopper_show, :senior_show]
# GET /shopping_processes/1
# GET /shopping_processes/1.json
def show
end
# POST /shopping_processes
# POST /shopping_processes.json
def create
#shopping_process.status =nil
#shopping_process.processed = nil
puts params.inspect
respond_to do |format|
if #shopping_process.save
format.html { redirect_to #shopping_process, notice: 'Shopping process was successfully created.' }
format.json { render :show, status: :created, location: #shopping_process }
else
format.html { render :new }
format.json { render json: #shopping_process.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /shopping_processes/1
# PATCH/PUT /shopping_processes/1.json
def update
respond_to do |format|
if #shopping_process.update(shopping_process_params)
format.html { redirect_to #shopping_process, notice: 'Shopping process was successfully updated.' }
format.json { render :show, status: :ok, location: #shopping_process }
else
format.html { render :edit }
format.json { render json: #shopping_process.errors, status: :unprocessable_entity }
end
end
end
# DELETE /shopping_processes/1
# DELETE /shopping_processes/1.json
def destroy
#shopping_process.destroy
respond_to do |format|
format.html { redirect_to shopping_processes_url, notice: 'Shopping process was successfully destroyed.' }
format.json { head :no_content }
end
end
def shopper_show
#shopping_process = ShoppingProcess.find(params[:id])
#users = {}
first = true
#shopping_process.shopping_lists.each do |shopping_list|
user = shopping_list.user
#users[user.id] = {color: (first ? 'blue' : 'yellow'), name: user.firstname + ' ' + user.lastname}
first = false
end
end
def senior_show
#shopping_process = ShoppingProcess.find(params[:id])
#shopping_process.shopping_lists.each do |shopping_list|
#if shopping_list.user == current_user
# #shopping_list = shopping_list
#end
#shopping_list = shopping_list
#to show the correct shopping list uncomment the block above and remove the declartion underneath it
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_shopping_process
#shopping_process = ShoppingProcess.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def shopping_process_params
params.require(:shopping_process).permit(:user_id, :status, :appointed, :processed, :shopping_list_id, processings_attributes: [ :shopping_list_id, :message ])
end
end
views/shopping_processes/form.html.erb
<%= form_for(shopping_process) do |f| %>
<% if shopping_process.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(shopping_process.errors.count, "error") %> prohibited this shopping_process from being saved:</h2>
<ul>
<% shopping_process.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :appointed %>
<%= f.datetime_select :appointed %>
</div>
<div class="field">
<%= f.label :shopper %>
<%= f.text_field :user_id, value: current_user.id, :readonly => true%>
</div>
<div class="field">
<%= f.label :shopping_list_id %>
<%= f.select :shopping_list_id, ShoppingList.accessible_by(current_ability).map{ |sl| [sl.name, sl.id] } %>
</div>
<!-- SUB FORM FOR NESTED RESOURCE : PROCESSINGS -->
<%= f.fields_for :processings, #shopping_process.processings.build do |ff| %>
<div>
<%= ff.label :Begleiter %>
<%= ff.select :shopping_list_id, ShoppingList.all.map{ |sl| [sl.user.firstname, sl.id]} , {:prompt => true} %>
</div>
<div>
<%= ff.label :message %>
<%= ff.text_field :message%>
</div>
<% end %>
<!-- Submit-->
<div class="actions">
<%= f.submit %>
</div>
<% end %>