stub docs

Author: timgraham

docs/source/index.rst

@@ -38,6 +38,7 @@ Models
 - :doc:`ref/models/fields`
 - :doc:`ref/models/querysets`
 - :doc:`ref/models/models`
+- :doc:`ref/models/indexes`
 
 **Topic guides:**
 

docs/source/ref/models/index.rst

@@ -10,3 +10,4 @@ Model API reference.
    fields
    querysets
    models
+   indexes

docs/source/ref/models/indexes.rst

@@ -0,0 +1,27 @@
+=====================
+Model index reference
+=====================
+
+.. module:: django_mongodb_backend.indexes
+   :synopsis: Database indexes for MongoDB.
+
+Some MongoDB-specific indexes are available in
+``django_mongodb_backend.indexes``.
+
+``SearchIndex``
+===============
+
+.. class:: SearchIndex(*expressions, **kwargs)
+
+...
+
+
+``VectorSearchIndex``
+=====================
+
+.. class:: VectorSearchIndex(*expressions, similarities="cosine", **kwargs)
+
+Available values for ``similarities`` are ``"euclidean"``, ``"cosine"``, and
+``"dotProduct"``.
+
+...