1 files changed, 35 insertions, 0 deletions
diff --git a/internal/db/errors/issue.go b/internal/db/errors/issue.go
new file mode 100644
index 00000000..903cc977
--- /dev/null
+++ b/internal/db/errors/issue.go
@@ -0,0 +1,35 @@
+// Copyright 2017 The Gogs 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 errors
+
+import "fmt"
+
+type IssueNotExist struct {
+	ID     int64
+	RepoID int64
+	Index  int64
+}
+
+func IsIssueNotExist(err error) bool {
+	_, ok := err.(IssueNotExist)
+	return ok
+}
+
+func (err IssueNotExist) Error() string {
+	return fmt.Sprintf("issue does not exist [id: %d, repo_id: %d, index: %d]", err.ID, err.RepoID, err.Index)
+}
+
+type InvalidIssueReference struct {
+	Ref string
+}
+
+func IsInvalidIssueReference(err error) bool {
+	_, ok := err.(InvalidIssueReference)
+	return ok
+}
+
+func (err InvalidIssueReference) Error() string {
+	return fmt.Sprintf("invalid issue reference [ref: %s]", err.Ref)
+}