delete attachments when delete repo

models/repo.go

 		return err
 	}
 
-	// Delete comments.
+	// Delete comments and attachments.
 	issues := make([]*Issue, 0, 25)
+	attachmentPaths := make([]string, 0, len(issues))
 	if err = sess.Where("repo_id=?", repoID).Find(&issues); err != nil {
 		return err
 	}
 		if _, err = sess.Delete(&Comment{IssueID: issues[i].ID}); err != nil {
 			return err
 		}
+
+		attachments := make([]*Attachment, 0, 5)
+		if err = sess.Where("issue_id=?", issues[i].ID).Find(&attachments); err != nil {
+			return err
+		}
+		for j := range attachments {
+			attachmentPaths = append(attachmentPaths, attachments[j].LocalPath())
+		}
+
+		if _, err = sess.Delete(&Attachment{IssueID: issues[i].ID}); err != nil {
+			return err
+		}
 	}
 
 	if _, err = sess.Delete(&Issue{RepoID: repoID}); err != nil {
 		}
 	}
 
+	// Remove attachment files.
+	for i := range attachmentPaths {
+		if err = os.Remove(attachmentPaths[i]); err != nil {
+			log.Warn("delete attachment: %v", err)
+		}
+	}
+
 	return sess.Commit()
 }