haystack is in

notesapi/v1/search_indexes.py

+from haystack import indexes
+from .models import Note
+
+class NoteIndex(indexes.SearchIndex, indexes.Indexable):
+    user = indexes.CharField(model_attr='user_id', indexed=False)
+    course_id = indexes.CharField(model_attr='course_id', indexed=False)
+    usage_id = indexes.CharField(model_attr='usage_id', indexed=False)
+    quote = indexes.CharField(model_attr='quote')
+    text = indexes.CharField(document=True, model_attr='text')
+    ranges = indexes.CharField(model_attr='ranges', indexed=False)
+    created = indexes.DateTimeField(model_attr='created')
+    updated = indexes.DateTimeField(model_attr='updated')
+
+    def get_model(self):
+        return Note
+
+    def index_queryset(self, using=None):
+        """Used when the entire index for model is updated."""
+        return self.get_model().objects.all()