Use longtext instead of varchar(1000) on description fields (#88)

pkg/migration/20190718200716.go

@@ -0,0 +1,48 @@
+//   Vikunja is a todo-list application to facilitate your life.
+//   Copyright 2019 Vikunja and contributors. All rights reserved.
+//
+//   This program is free software: you can redistribute it and/or modify
+//   it under the terms of the GNU General Public License as published by
+//   the Free Software Foundation, either version 3 of the License, or
+//   (at your option) any later version.
+//
+//   This program is distributed in the hope that it will be useful,
+//   but WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//   GNU General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package migration
+
+import (
+	"github.com/go-xorm/xorm"
+	"src.techknowlogick.com/xormigrate"
+)
+
+func init() {
+	tables := []string{"namespaces", "labels", "teams", "tasks", "list"}
+	migrations = append(migrations, &xormigrate.Migration{
+		ID:          "20190718200716",
+		Description: "Update description definition to be longtext",
+		Migrate: func(tx *xorm.Engine) error {
+			for _, table := range tables {
+				err := modifyColumn(tx, table, "description", "longtext null")
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+		Rollback: func(tx *xorm.Engine) error {
+			for _, table := range tables {
+				err := modifyColumn(tx, table, "description", "varchar(1000) null")
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+	})
+}

pkg/migration/migration.go

@@ -117,6 +117,22 @@ func dropTableColum(x *xorm.Engine, tableName, col string) error {
 	return nil
 }
 
+// Modifies a column definition
+func modifyColumn(x *xorm.Engine, tableName, col, newDefinition string) error {
+	switch config.DatabaseType.GetString() {
+	case "sqlite":
+		log.Log.Warning("Unable to modify columns in SQLite")
+	case "mysql":
+		_, err := x.Exec("ALTER TABLE " + tableName + " MODIFY COLUMN " + col + " " + newDefinition)
+		if err != nil {
+			return err
+		}
+	default:
+		log.Log.Fatal("Unknown db.")
+	}
+	return nil
+}
+
 func initSchema(tx *xorm.Engine) error {
 	return tx.Sync2(
 		models.GetTables()...,