fix limit, offset bugs

select.go

@@ -109,8 +109,8 @@ func (q *SelectQuery) RightJoin(def string) *SelectQuery {
 	return q
 }
 
-func (q *SelectQuery) Offset(limit int) *SelectQuery {
+func (q *SelectQuery) Offset(offset int) *SelectQuery {
-	q.limit = limit
+	q.offset = offset
 	return q
 }
 
@@ -215,7 +215,7 @@ func (q *SelectQuery) String() string {
 
 	if q.limit > 0 {
 		if q.offset > 0 {
-			strs = append(strs, fmt.Sprintf("limit %d offset %d", q.offset, q.limit))
+			strs = append(strs, fmt.Sprintf("limit %d offset %d", q.limit, q.offset))
 		} else {
 			strs = append(strs, fmt.Sprintf("limit %d", q.limit))
 		}