uncomment 4.9 upgrade code (#8582)

* set db to 4.9

* add prepatory code for 4.10

* bug from old example

model/version.go

@@ -13,6 +13,7 @@ import (
 // It should be maintained in chronological order with most current
 // release at the front of the list.
 var versions = []string{
+	"4.9.0",
 	"4.8.1",
 	"4.8.0",
 	"4.7.2",

store/sqlstore/upgrade.go

@@ -16,6 +16,7 @@ import (
 )
 
 const (
+	VERSION_4_10_0           = "4.10.0"
 	VERSION_4_9_0            = "4.9.0"
 	VERSION_4_8_1            = "4.8.1"
 	VERSION_4_8_0            = "4.8.0"
@@ -75,6 +76,7 @@ func UpgradeDatabase(sqlStore SqlStore) {
 	UpgradeDatabaseToVersion48(sqlStore)
 	UpgradeDatabaseToVersion481(sqlStore)
 	UpgradeDatabaseToVersion49(sqlStore)
+	UpgradeDatabaseToVersion410(sqlStore)
 
 	// If the SchemaVersion is empty this this is the first time it has ran
 	// so lets set it to the current version.
@@ -396,8 +398,7 @@ func UpgradeDatabaseToVersion49(sqlStore SqlStore) {
 	// a number of parameters in `config.json` to a `Roles` table in the database. The migration code can be seen
 	// in the file `app/app.go` in the function `DoAdvancedPermissionsMigration()`.
 
-	//TODO: Uncomment the following condition when version 4.9.0 is released
+	if shouldPerformUpgrade(sqlStore, VERSION_4_8_1, VERSION_4_9_0) {
-	//if shouldPerformUpgrade(sqlStore, VERSION_4_8_1, VERSION_4_9_0) {
 		sqlStore.CreateColumnIfNotExists("Teams", "LastTeamIconUpdate", "bigint", "bigint", "0")
 		defaultTimezone := model.DefaultUserTimezone()
 		defaultTimezoneValue, err := json.Marshal(defaultTimezone)
@@ -406,6 +407,14 @@ func UpgradeDatabaseToVersion49(sqlStore SqlStore) {
 		}
 		sqlStore.CreateColumnIfNotExists("Users", "Timezone", "varchar(256)", "varchar(256)", string(defaultTimezoneValue))
 		sqlStore.RemoveIndexIfExists("idx_channels_displayname", "Channels")
-	//	saveSchemaVersion(sqlStore, VERSION_4_9_0)
+		saveSchemaVersion(sqlStore, VERSION_4_9_0)
+	}
+}
+
+func UpgradeDatabaseToVersion410(sqlStore SqlStore) {
+	// TODO: Uncomment following condition when version 4.10.0 is released
+	//if shouldPerformUpgrade(sqlStore, VERSION_4_9_0, VERSION_4_10_0) {
+
+	//	saveSchemaVersion(sqlStore, VERSION_4_10_0)
 	//}
 }