Merge pull request #1199 from hmhealey/plt600

PLT-600 Renamed channel description to channel header and added channel purpose field

store/sql_channel_store.go

@@ -25,7 +25,8 @@ func NewSqlChannelStore(sqlStore *SqlStore) ChannelStore {
 		table.ColMap("DisplayName").SetMaxSize(64)
 		table.ColMap("Name").SetMaxSize(64)
 		table.SetUniqueTogether("Name", "TeamId")
-		table.ColMap("Description").SetMaxSize(1024)
+		table.ColMap("Header").SetMaxSize(1024)
+		table.ColMap("Purpose").SetMaxSize(128)
 		table.ColMap("CreatorId").SetMaxSize(26)
 
 		tablem := db.AddTableWithName(model.ChannelMember{}, "ChannelMembers").SetKeys(false, "ChannelId", "UserId")
@@ -83,6 +84,11 @@ func (s SqlChannelStore) UpgradeSchemaIfNeeded() {
 
 		s.RemoveColumnIfExists("ChannelMembers", "NotifyLevel")
 	}
+
+	// BEGIN REMOVE AFTER 1.2.0
+	s.RenameColumnIfExists("Channels", "Description", "Header", "varchar(1024)")
+	s.CreateColumnIfNotExists("Channels", "Purpose", "varchar(1024)", "varchar(1024)", "")
+	// END REMOVE AFTER 1.2.0
 }
 
 func (s SqlChannelStore) CreateIndexesIfNotExists() {