From 5d55ca19be9d71dc83a4b470dd222c94b2d3b579 Mon Sep 17 00:00:00 2001
From: slene <vslene@gmail.com>
Date: Sat, 12 Oct 2013 06:57:14 +0800
Subject: [PATCH] orm add Exist func

---
 orm/orm_queryset.go | 5 +++++
 orm/types.go        | 1 +
 2 files changed, 6 insertions(+)

diff --git a/orm/orm_queryset.go b/orm/orm_queryset.go
index c1788f5b..b25d0542 100644
--- a/orm/orm_queryset.go
+++ b/orm/orm_queryset.go
@@ -114,6 +114,11 @@ func (o *querySet) Count() (int64, error) {
 	return o.orm.alias.DbBaser.Count(o.orm.db, o, o.mi, o.cond, o.orm.alias.TZ)
 }
 
+func (o *querySet) Exist() bool {
+	cnt, _ := o.orm.alias.DbBaser.Count(o.orm.db, o, o.mi, o.cond, o.orm.alias.TZ)
+	return cnt > 0
+}
+
 func (o *querySet) Update(values Params) (int64, error) {
 	return o.orm.alias.DbBaser.UpdateBatch(o.orm.db, o, o.mi, o.cond, values, o.orm.alias.TZ)
 }
diff --git a/orm/types.go b/orm/types.go
index 7ed5e3a6..bf18e2c2 100644
--- a/orm/types.go
+++ b/orm/types.go
@@ -50,6 +50,7 @@ type QuerySeter interface {
 	OrderBy(...string) QuerySeter
 	RelatedSel(...interface{}) QuerySeter
 	Count() (int64, error)
+	Exist() bool
 	Update(Params) (int64, error)
 	Delete() (int64, error)
 	PrepareInsert() (Inserter, error)