Add stock_article_selection (deleting multiple stock articles at once)

app/models/stock_article_selection.rb

@@ -0,0 +1,24 @@
+# encoding: utf-8
+class StockArticleSelection < ActiveRecord::Base
+  
+  # Associations
+  has_and_belongs_to_many :stock_articles
+  belongs_to :created_by, :class_name => 'User', :foreign_key => 'created_by_user_id'
+  belongs_to :finished_by, :class_name => 'User', :foreign_key => 'finished_by_user_id'
+  
+  # Validations
+  validate :include_stock_articles
+  
+  def all_articles
+    all_articles = stock_article_ids
+  end
+  
+  protected
+  
+  def include_stock_articles
+    errors.add(:stock_articles, "Es muss mindestens ein Lagerartikel ausgewählt sein.") if stock_articles.empty?
+  end
+  
+  private
+  
+end