The controller demonstrates the example use of <i>belongs_to</i>, <i>has_one</i>, <i>has_many</i>, 
and <i>has_many_through</i> ORM database record relations. This example also clearly shows the use
of <b>Index-Only SQL</b> and the possibilities it opens for full object-caching while achieving 
real-time results. See the actual SQL-queries below.