Fix migration order v1.3 (#3157)

* FIx migration order

* Fix migration function file names to match version

* Fix typo

* Add note about ignored errors

* Fix typo, remove wrong comment

models/migrations/v49.go

@@ -0,0 +1,73 @@
+// Copyright 2017 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 (
+	"fmt"
+	"time"
+
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/go-xorm/xorm"
+)
+
+func addTimetracking(x *xorm.Engine) error {
+	// RepoUnit describes all units of a repository
+	type RepoUnit struct {
+		ID          int64
+		RepoID      int64                  `xorm:"INDEX(s)"`
+		Type        int                    `xorm:"INDEX(s)"`
+		Config      map[string]interface{} `xorm:"JSON"`
+		CreatedUnix int64                  `xorm:"INDEX CREATED"`
+		Created     time.Time              `xorm:"-"`
+	}
+
+	// Stopwatch see models/issue_stopwatch.go
+	type Stopwatch struct {
+		ID          int64     `xorm:"pk autoincr"`
+		IssueID     int64     `xorm:"INDEX"`
+		UserID      int64     `xorm:"INDEX"`
+		Created     time.Time `xorm:"-"`
+		CreatedUnix int64
+	}
+
+	// TrackedTime see models/issue_tracked_time.go
+	type TrackedTime struct {
+		ID          int64     `xorm:"pk autoincr" json:"id"`
+		IssueID     int64     `xorm:"INDEX" json:"issue_id"`
+		UserID      int64     `xorm:"INDEX" json:"user_id"`
+		Created     time.Time `xorm:"-" json:"created"`
+		CreatedUnix int64     `json:"-"`
+		Time        int64     `json:"time"`
+	}
+
+	if err := x.Sync2(new(Stopwatch)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
+	}
+	if err := x.Sync2(new(TrackedTime)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
+	}
+	//Updating existing issue units
+	units := make([]*RepoUnit, 0, 100)
+	err := x.Where("`type` = ?", V16UnitTypeIssues).Find(&units)
+	if err != nil {
+		return fmt.Errorf("Query repo units: %v", err)
+	}
+	for _, unit := range units {
+		if unit.Config == nil {
+			unit.Config = make(map[string]interface{})
+		}
+		if _, ok := unit.Config["EnableTimetracker"]; !ok {
+			unit.Config["EnableTimetracker"] = setting.Service.DefaultEnableTimetracking
+		}
+		if _, ok := unit.Config["AllowOnlyContributorsToTrackTime"]; !ok {
+			unit.Config["AllowOnlyContributorsToTrackTime"] = setting.Service.DefaultAllowOnlyContributorsToTrackTime
+		}
+		if _, err := x.ID(unit.ID).Cols("config").Update(unit); err != nil {
+			return err
+		}
+	}
+	return nil
+}