33👍
a little late but i hope it still helps someone
the possible configurations for the searchfield are listed at http://www.django-rest-framework.org/api-guide/filtering/#searchfilter.
'^' Starts-with search. '=' Exact matches. (case-insensitive) '@' Full-text search. (Currently only supported Django's MySQL backend.) '$' Regex search. (Only with Django Rest Framework)
In your case, just add
search_fields = ['=fieldname', 'otherfieldname']
to your admin.
Update:
Since Django 2.1 it is also possible to add lookups to the search fields (e.g. ‘fieldname__exact’). You can find infos in the Django Docs, as well as the possible Lookups
Source:stackexchange.com