From 807aadaaad317b67965052048b3a2fb92a1aaa79 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jorge=20C=2E=20Leit=C3=A3o?= <jorgecarleitao@gmail.com>
Date: Mon, 16 Jun 2014 21:30:26 +0200
Subject: [PATCH] [1.7.x] Fixed #14481 -- Documented implicit "through" class
 created by ManyToManyField.

Thanks to jonathanmorgan for the report and initial patch.

Backport of de90129070 from master
---
 docs/ref/models/fields.txt | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index 52f02e1b29..054547f89b 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -1349,6 +1349,19 @@ that control how the relationship functions.
     :ref:`extra data with a many-to-many relationship
     <intermediary-manytomany>`.
 
+    If you don't specify an explicit ``through`` model, there is still an
+    implicit ``through`` model class you can use to directly access the table
+    created to hold the association. It has three fields:
+
+    * ``id``: the primary key of the relation.
+    * ``<containing_model>_id``: the ``id`` of the model that declares the
+      ``ManyToManyField``.
+    * ``<other_model>_id``: the ``id`` of the model that the
+      ``ManyToManyField`` points to.
+
+    This class can be used to query associated records for a given model
+    instance like a normal model.
+
 .. attribute:: ManyToManyField.through_fields
 
     .. versionadded:: 1.7