From 7c5ec0752239b7a002f87085d34478b0e2b81e5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gr=C3=A9goire=20Molveau?= <gr3ggz@gmail.com>
Date: Sun, 22 Jan 2017 13:57:21 +0100
Subject: [PATCH] Add back-reference example to many-to-many doc

---
 documents/associations.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/documents/associations.md b/documents/associations.md
index 146a08b7..5e474dc0 100644
--- a/documents/associations.md
+++ b/documents/associations.md
@@ -174,6 +174,25 @@ db.Model(&user).Related(&languages, "Languages")
 //// SELECT * FROM "languages" INNER JOIN "user_languages" ON "user_languages"."language_id" = "languages"."id" WHERE "user_languages"."user_id" = 111
 ```
 
+*With back-reference :
+```go
+// User has and belongs to many languages, use `user_languages` as join table
+// Make sure the two models are in different files
+type User struct {
+	gorm.Model
+	Languages         []Language `gorm:"many2many:user_languages;"`
+}
+
+type Language struct {
+	gorm.Model
+	Name string
+	Users         	  []User     `gorm:"many2many:user_languages;"`
+}
+
+db.Model(&language).Related(&users)
+//// SELECT * FROM "users" INNER JOIN "user_languages" ON "user_languages"."user_id" = "users"."id" WHERE  ("user_languages"."language_id" IN ('111'))
+```
+
 *Specify Foreign Key & Association Key*
 
 ```go