django - simplest way to customize admin search
<p>I'm using django 1.8.
What I need is to do case insensitive <strong>admin-search</strong> in multiple fields and allow the user to use the AND, OR and NOT operators and some how group words either with parentheses or quotes.
Search Example:</p>

<p>cotton and (red or "dark blue")</p>

<p>I've already discovered django-advanced-filter and django-filter...
They are filters! I also want to allow the user to type in the keys in the search box.
I know that <strong>get_search_results</strong> allows us to override the search behaviour, but before I write a code for this, I want to ask is there a package that would do this for me?
Note that I feel that making a custom search with haystack is pretty complex.</p>