Implement "conversation lock" for issue comments (#5073)

models/migrations/migrations.go

@@ -213,6 +213,8 @@ var migrations = []Migration{
 	NewMigration("rename repo is_bare to repo is_empty", renameRepoIsBareToIsEmpty),
 	// v79 -> v80
 	NewMigration("add can close issues via commit in any branch", addCanCloseIssuesViaCommitInAnyBranch),
+	// v80 -> v81
+	NewMigration("add is locked to issues", addIsLockedToIssues),
 }
 
 // Migrate database to current version

models/migrations/v80.go

@@ -0,0 +1,18 @@
+// 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 "github.com/go-xorm/xorm"
+
+func addIsLockedToIssues(x *xorm.Engine) error {
+	// Issue see models/issue.go
+	type Issue struct {
+		ID       int64 `xorm:"pk autoincr"`
+		IsLocked bool  `xorm:"NOT NULL DEFAULT false"`
+	}
+
+	return x.Sync2(new(Issue))
+
+}