As an example I added a search_fields to ShiftuserAdmin class:
class ShiftuserAdmin(admin.ModelAdmin):
list_display = ('first_name', 'last_name', 'function')
ordering = ('first_name', 'last_name')
search_fields = ['first_name', 'last_name']
admin.site.register(Shiftuser, ShiftuserAdmin)
Is there an easy way to reset a search entry? Or do I have to write a javascript to achief this?