fix(kanban): Created migration to create a default bucket for projects that do not already have any buckets

pkg/migration/20230824132533.go

@@ -17,23 +17,92 @@
 package migration
 
 import (
+	"time"
+
 	"src.techknowlogick.com/xormigrate"
 	"xorm.io/xorm"
 )
 
 type buckets20230824132533 struct {
+	ID          int64     `xorm:"int(11) autoincr not null unique pk" json:"id" param:"bucket"`
+	Title       string    `xorm:"text not null" valid:"required" minLength:"1" json:"title"`
+	ProjectID   int64     `xorm:"int(11) not null" json:"project_id" param:"project"`
+	Created     time.Time `xorm:"created not null" json:"created"`
+	Updated     int64     `xorm:"updated not null" json:"updated"`
+	CreatedByID int64     `xorm:"int(11) not null" json:"-"`
 }
 
 func (buckets20230824132533) TableName() string {
 	return "buckets"
 }
 
+type project20230824132533 struct {
+	ID      int64 `xorm:"int(11) autoincr not null unique pk" json:"id" param:"project"`
+	OwnerID int64 `xorm:"int(11) INDEX not null" json:"-"`
+}
+
+func (project *project20230824132533) TableName() string {
+	return "projects"
+}
+
+type task20230824132533 struct {
+	ID        int64     `xorm:"int(11) autoincr not null unique pk" json:"id" param:"projecttask"`
+	ProjectID int64     `xorm:"int(11) INDEX not null" json:"project_id" param:"project"`
+	Updated   time.Time `xorm:"updated not null" json:"updated"`
+	BucketID  int64     `xorm:"int(11) null" json:"bucket_id"`
+}
+
+func (task *task20230824132533) TableName() string {
+	return "tasks"
+}
+
 func init() {
 	migrations = append(migrations, &xormigrate.Migration{
 		ID:          "20230824132533",
 		Description: "",
-		Migrate: func(tx *xorm.Engine) error {
-			return tx.Sync2(buckets20230824132533{})
+		Migrate: func(tx *xorm.Engine) (err error) {
+			projects := []*project20230824132533{}
+			err = tx.Find(&projects)
+			if err != nil {
+				return
+			}
+
+			tasks := []*task20230824132533{}
+			err = tx.Find(&tasks)
+			if err != nil {
+				return
+			}
+
+			// This map contains all buckets with their project ids as key
+			buckets := make(map[int64]*buckets20230824132533, len(projects))
+			for _, project := range projects {
+
+				buckets[project.ID] = &buckets20230824132533{
+					ProjectID: project.ID,
+					Title:     "Backlog",
+					// The bucket creator is just the same as the project's one
+					CreatedByID: project.OwnerID,
+				}
+
+				_, err = tx.Insert(buckets[project.ID])
+				if err != nil {
+					return
+				}
+
+				for _, task := range tasks {
+					if task.ProjectID != project.ID {
+						continue
+					}
+
+					task.BucketID = buckets[project.ID].ID
+					_, err = tx.Where("id = ?", task.ID).Update(task)
+					if err != nil {
+						return
+					}
+				}
+			}
+
+			return
 		},
 		Rollback: func(tx *xorm.Engine) error {
 			return nil