[API] Extend times API (#9200)

Extensively extend the times API.

close #8833; close #8513; close #8559

models/migrations/migrations.go

@@ -286,6 +286,8 @@ var migrations = []Migration{
 	NewMigration("Remove authentication credentials from stored URL", sanitizeOriginalURL),
 	// v115 -> v116
 	NewMigration("add user_id prefix to existing user avatar name", renameExistingUserAvatarName),
+	// v116 -> v117
+	NewMigration("Extend TrackedTimes", extendTrackedTimes),
 }
 
 // Migrate database to current version

models/migrations/v116.go

@@ -0,0 +1,30 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migrations
+
+import (
+	"code.gitea.io/gitea/models"
+
+	"xorm.io/xorm"
+)
+
+func extendTrackedTimes(x *xorm.Engine) error {
+	sess := x.NewSession()
+	defer sess.Close()
+
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if _, err := sess.Exec("DELETE FROM tracked_time WHERE time IS NULL"); err != nil {
+		return err
+	}
+
+	if err := sess.Sync2(new(models.TrackedTime)); err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}