Bug fixed for deleted label in issue comment (#904)

* bug fixed for deleted label in issue comment

* fix indent

models/issue_comment.go

@@ -214,12 +214,13 @@ func (c *Comment) LoadLabel() error {
 	has, err := x.ID(c.LabelID).Get(&label)
 	if err != nil {
 		return err
-	} else if !has {
-		return ErrLabelNotExist{
-			LabelID: c.LabelID,
-		}
+	} else if has {
+		c.Label = &label
+	} else {
+		// Ignore Label is deleted, but not clear this table
+		log.Warn("Commit %d cannot load label %d", c.ID, c.LabelID)
 	}
-	c.Label = &label
+
 	return nil
 }
 

models/issue_label.go

@@ -249,6 +249,11 @@ func DeleteLabel(repoID, labelID int64) error {
 		return err
 	}
 
+	// Clear label id in comment table
+	if _, err = sess.Where("label_id = ?", labelID).Cols("label_id").Update(&Comment{}); err != nil {
+		return err
+	}
+
 	return sess.Commit()
 }