Reorder migrations, skip errors if running migration again (#3160)

* Reorder migrations, skip errors if running migration again

* Rename migration file names to match migration version

* Add note about ingored error

models/migrations/v50.go

@@ -5,24 +5,51 @@
 package migrations
 
 import (
-	"fmt"
+	"time"
+
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
 
 	"github.com/go-xorm/xorm"
 )
 
-func addReactions(x *xorm.Engine) error {
-	// Reaction see models/issue_reaction.go
-	type Reaction struct {
+func migrateProtectedBranchStruct(x *xorm.Engine) error {
+	type ProtectedBranch struct {
 		ID          int64  `xorm:"pk autoincr"`
-		Type        string `xorm:"INDEX UNIQUE(s) NOT NULL"`
-		IssueID     int64  `xorm:"INDEX UNIQUE(s) NOT NULL"`
-		CommentID   int64  `xorm:"INDEX UNIQUE(s)"`
-		UserID      int64  `xorm:"INDEX UNIQUE(s) NOT NULL"`
-		CreatedUnix int64  `xorm:"INDEX created"`
+		RepoID      int64  `xorm:"UNIQUE(s)"`
+		BranchName  string `xorm:"UNIQUE(s)"`
+		CanPush     bool
+		Created     time.Time `xorm:"-"`
+		CreatedUnix int64
+		Updated     time.Time `xorm:"-"`
+		UpdatedUnix int64
 	}
 
-	if err := x.Sync2(new(Reaction)); err != nil {
-		return fmt.Errorf("Sync2: %v", err)
+	var pbs []ProtectedBranch
+	err := x.Find(&pbs)
+	if err != nil {
+		return err
 	}
+
+	for _, pb := range pbs {
+		if pb.CanPush {
+			if _, err = x.ID(pb.ID).Delete(new(ProtectedBranch)); err != nil {
+				return err
+			}
+		}
+	}
+
+	switch {
+	case setting.UseSQLite3:
+		log.Warn("Unable to drop columns in SQLite")
+	case setting.UseMySQL, setting.UsePostgreSQL, setting.UseMSSQL, setting.UseTiDB:
+		if _, err := x.Exec("ALTER TABLE protected_branch DROP COLUMN can_push"); err != nil {
+			// Ignoring this error in case we run this migration second time (after migration reordering)
+			log.Warn("DROP COLUMN can_push (skipping): %v", err)
+		}
+	default:
+		log.Fatal(4, "Unrecognized DB")
+	}
+
 	return nil
 }