models: update num_comments for type=0 during migrations

The num_comment field is only about the comments of type
CommentTypeComment, i.e. 0.

Signed-off-by: Loïc Dachary <[email protected]>

Author: Loïc Dachary

models/migrate.go

@@ -166,7 +166,7 @@ func InsertIssueComments(comments []*Comment) error {
 	}
 
 	for issueID := range issueIDs {
-		if _, err := db.Exec(ctx, "UPDATE issue set num_comments = (SELECT count(*) FROM comment WHERE issue_id = ?) WHERE id = ?", issueID, issueID); err != nil {
+		if _, err := db.Exec(ctx, "UPDATE issue set num_comments = (SELECT count(*) FROM comment WHERE issue_id = ? AND `type`=?) WHERE id = ?", issueID, CommentTypeComment, issueID); err != nil {
 			return err
 		}
 	}