app.py

from django.apps import AppConfig
from watson import search as watson

search_engine_1 = watson.SearchEngine("engine_1")
search_engine_2 = watson.SearchEngine("engine_2")

class YourAppConfig(AppConfig):
    name = "customer"
    def ready(self):
        search_engine_1.register(self.get_model("ModelA"))
        search_engine_1.register(self.get_model("ModelB"))
        search_engine_2.register(self.get_model("ModelC"))
        search_engine_2.register(self.get_model("ModelD"))

urls.py

from django.conf.urls import url, patterns
from my_project import views

urlpatterns = [
  url("^search-1/$", views.SearchEngine1View.as_view()),
  url("^search-2/$", views.SearchEngine2View.as_view()),
]

views.py

from watson.views import SearchView
from my_project.search import search_engine_1, search_engine_1


class SearchEngine1View(SearchView):
  
  def get_queryset(self):
        """Returns the initial queryset."""
        return search_engine_1.search(self.query, models=self.get_models(), exclude=self.get_exclude())


class SearchEngine2View(SearchView):
  
  def get_queryset(self):
        """Returns the initial queryset."""
        return search_engine_2.search(self.query, models=self.get_models(), exclude=self.get_exclude())