title: How to extend django admin select?
body: <p>Django creates a search box on the list display page when the field "search_fields" is included in a ModelAdmin.</p>
  
  <p>Some of my inline models refer to the items on the list page. If the search box terms match fields in these inline models, I'd like the results to include the referents in the list.</p>
  
  <p>Example: Database has a table of names and a table of addresses. For each name, there can be several addresses. Each address references a name. When I am searching the list of names, I'd like to be able to enter "Main Street", search the addresses and have the names referred to by those addresses displayed.</p>
  
  <p>I think I would have to override the search function associated with the search box. If that is right, where is that function located?</p>