Use safe dynamic finders of simply stored for suppliers sections

app/models/section.rb

@@ -14,13 +14,7 @@ class Section
   validates :title, presence: true
   validates :supplier_id, presence: true
 
-  # Probably faster to directly retreive the document and return nil
-  # if the supplier does not match
-  def self.find_by_supplier_and_id(supplier, id)
-    section = find(id)
-    return nil unless section.supplier_id == supplier.id
-    section
-  end
+  view :by_supplier_id_and_id, key: [:supplier_id, :_id]
 
   def occupied_tables
     return @occupied_tables if @occupied_tables.present?