Create actionmodel stock/stockentry and change form

app/assets/javascripts/stock.js.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/stylesheets/products.css.scss

@@ -22,6 +22,10 @@
   margin-bottom: 20px;
 }
 
+#products-table {
+  margin-top: 20px;
+}
+
 #products-table .form-group {
   margin-bottom: 0;
 }
@@ -35,4 +39,4 @@
 
 div.out-of-stock {
   border-color:red;
-}
+}

app/assets/stylesheets/stock.css.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the stock controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/products_controller.rb

@@ -35,19 +35,6 @@ class ProductsController < ApplicationController
     respond_with @product
   end
 
-  def stock
-    @products = Product.all
-  end
-
-  def update_stock
-    @products = Product.all
-    @products.each do |product|
-      stock_inc = params[:products][product.id.to_s][:stock_inc].to_i
-      product.increment!(:stock, stock_inc) if stock_inc > 0
-    end
-    redirect_to products_path
-  end
-
   private
 
     def product_params

app/controllers/stocks_controller.rb

@@ -0,0 +1,20 @@
+class StocksController < ApplicationController
+  load_and_authorize_resource
+
+  def new
+    @stock = Stock.new
+    Product.all.each do |p|
+      @stock.stock_entries << Stock::StockEntry.new(product: p)
+    end
+  end
+
+  def create
+    @stock = Stock.new(params[:stock])
+    if @stock.update
+      flash[:success] = "Stock updated!"
+      redirect_to products_path
+    else
+      render 'new'
+    end
+  end
+end

app/helpers/stock_helper.rb

@@ -0,0 +1,2 @@
+module StockHelper
+end

app/models/stock.rb

@@ -0,0 +1,60 @@
+class Stock
+  include ActiveModel::Model
+  include ActiveModel::Validations
+
+  def stock_entries
+    @stockentries ||= []
+  end
+
+  def stock_entries_attributes=(attributes)
+    attributes.each do |i, se_attr|
+      stock_entries.push(StockEntry.new(se_attr))
+    end
+  end
+
+  validate :validate_stock_entries
+  def validate_stock_entries
+    stock_entries.each do |se|
+      unless se.valid?
+        se.errors.each do |_, e|
+          errors[se.product.name] = "count " + e
+        end
+      end
+    end
+  end
+
+  def update
+    return false unless valid?
+
+    stock_entries.each do |se|
+      se.product.increment!(:stock, se.count.to_i) if se.count.to_i > 0
+    end
+  end
+
+  class StockEntry
+    include ActiveModel::Model
+    include ActiveModel::Validations
+
+    validates :count, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
+    validates :product, presence: true
+
+    def initialize(attributes={})
+      super
+      @count ||= 0
+    end
+
+    attr_accessor :product, :count
+
+    def self.products
+      @products ||= Product.all.to_a
+    end
+
+    def product_id
+      @product.id
+    end
+
+    def product_id=(id)
+      @product = StockEntry.products.select { |p| p.id == id.to_i }.first
+    end
+  end
+end

app/views/layouts/_header.html.erb

@@ -37,7 +37,7 @@
               <ul class="dropdown-menu" role="menu">
                 <li><%= link_to "List", products_path %></li>
                 <li><%= link_to "Add product" , new_product_path %></li>
-                <li><%= link_to "Add stock", stock_products_path %></li>
+                <li><%= link_to "Add stock", new_stock_path %></li>
               </ul>
             </li>
             <li class="dropdown">

app/views/products/stock.html.erb

@@ -1,14 +0,0 @@
-<div class="row">
-  <div class="col-md-6 col-md-offset-3">
-    <%= form_tag do %>
-      <% @products.each do |product| %>
-        <%= fields_for "products[]", product do |form| %>
-          <%= image_tag product.avatar %>
-          <%= form.number_field :stock_inc, value: 0, class: 'form-control' %>
-        <% end %>
-      <% end %>
-
-      <%= submit_tag "Insert stock", class: 'btn btn-primary' %>
-    <% end %>
-  </div>
-</div>

app/views/products_list/listview.html.erb

@@ -3,6 +3,7 @@
   <div class="col-md-8 col-md-offset-2">
     <h1>Products</h1>
     <%= render partial: 'flash' %>
+    <%= link_to "Add Stock", new_stock_path, class: "btn btn-default" %>
 
     <table id="products-table" class="table table-striped">
       <tr>

app/views/stock/new.html.erb

@@ -0,0 +1,7 @@
+<div class="row">
+  <div class="col-md-6 col-md-offset-3">
+    <%= form_for @stock do %>
+      <%= submit_tag "Insert stock", class: 'btn btn-primary' %>
+    <% end %>
+  </div>
+</div>

app/views/stocks/new.html.erb

@@ -0,0 +1,20 @@
+<div class="row">
+  <div class="col-md-6 col-md-offset-3">
+    <h2>Add stock</h2>
+    <%= f_form_for @stock do |f| %>
+      <%= f.error_messages %>
+      <%= f.fields_for :stock_entries do |se_field| %>
+        <div class="row">
+          <div class="col-sm-3">
+            <%= image_tag se_field.object.product.avatar %>
+          </div>
+          <div class="col-sm-9">
+            <%= se_field.hidden_field :product_id %>
+            <%= se_field.number_field :count, skip_label: true %>
+          </div>
+        </div>
+      <% end %>
+      <%= f.submit "Insert stock", class: 'btn btn-primary' %>
+    <% end %>
+  </div>
+</div>

config/routes.rb

@@ -25,12 +25,8 @@ Rails.application.routes.draw do
     get 'dagschotel/:product_id' => 'users#update_dagschotel', as: 'dagschotel'
   end
 
-  resources :products do
-    collection do
-      get  'stock' => 'products#stock', as: 'stock'
-      post 'stock' => 'products#update_stock', as: 'update_stock'
-    end
-  end
+  resources :products
+  resources :stocks
 
   get 'overview' => 'orders#overview', as: "orders"
 end

test/controllers/stock_controller_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class StockControllerTest < ActionController::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/fixtures/stock_entries.yml

@@ -0,0 +1,11 @@
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined.  If you add columns to the
+# model remove the '{}' from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+#  column: value

test/models/stock_entry_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class StockEntryTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end