title: Ordering query result by numeric strings in django (postgres backend)
body: <p>I have a table with a name (varchar) field that only holds numeric string and I want to order my queries by this field. But name fields are being ordered by alphabetically but I want them to be ordered numerically. 
  For instance if I get 1 2 200 100 as name fields values, It is being ordered like 1 100 2 200
  but I need them to be 1 2 100 200.</p>
  
  <p>I could be able to come up with following row query</p>
  
  <pre><code>select *
  from my_table as t
  where t.foo='bar'
  order by cast(t.name as integer);
  </code></pre>
  
  <p>But cannot represent this as django orm querysets? is there any way to do that?</p>