From c669e4b791c17955380c771e164ce9899b8efc70 Mon Sep 17 00:00:00 2001
From: Jinzhu <wosmvp@gmail.com>
Date: Wed, 4 May 2016 10:37:31 +0800
Subject: [PATCH] Set AUTO_INCREMENT if field is an auto increment field

---
 dialect_mysql.go    | 4 ++++
 dialect_postgres.go | 2 ++
 dialect_sqlite3.go  | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/dialect_mysql.go b/dialect_mysql.go
index 6fade59d..f62bbe35 100644
--- a/dialect_mysql.go
+++ b/dialect_mysql.go
@@ -33,24 +33,28 @@ func (mysql) DataTypeOf(field *StructField) string {
 			sqlType = "boolean"
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32:
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "int AUTO_INCREMENT"
 			} else {
 				sqlType = "int"
 			}
 		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "int unsigned AUTO_INCREMENT"
 			} else {
 				sqlType = "int unsigned"
 			}
 		case reflect.Int64:
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "bigint AUTO_INCREMENT"
 			} else {
 				sqlType = "bigint"
 			}
 		case reflect.Uint64:
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "bigint unsigned AUTO_INCREMENT"
 			} else {
 				sqlType = "bigint unsigned"
diff --git a/dialect_postgres.go b/dialect_postgres.go
index 09ac5961..c5bed8f1 100644
--- a/dialect_postgres.go
+++ b/dialect_postgres.go
@@ -32,12 +32,14 @@ func (postgres) DataTypeOf(field *StructField) string {
 			sqlType = "boolean"
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "serial"
 			} else {
 				sqlType = "integer"
 			}
 		case reflect.Int64, reflect.Uint64:
 			if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "bigserial"
 			} else {
 				sqlType = "bigint"
diff --git a/dialect_sqlite3.go b/dialect_sqlite3.go
index 5c262aaf..79adf6d2 100644
--- a/dialect_sqlite3.go
+++ b/dialect_sqlite3.go
@@ -30,12 +30,14 @@ func (sqlite3) DataTypeOf(field *StructField) string {
 			sqlType = "bool"
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
 			if field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "integer primary key autoincrement"
 			} else {
 				sqlType = "integer"
 			}
 		case reflect.Int64, reflect.Uint64:
 			if field.IsPrimaryKey {
+				field.TagSettings["AUTO_INCREMENT"] = "AUTO_INCREMENT"
 				sqlType = "integer primary key autoincrement"
 			} else {
 				sqlType = "bigint"