fix bug when buffersize with iterate

Author: lunny

session_iterate.go

@@ -60,10 +60,6 @@ func (session *Session) BufferSize(size int) *Session {
 }
 
 func (session *Session) bufferIterate(bean interface{}, fun IterFunc) error {
-	if session.isAutoClose {
-		defer session.Close()
-	}
-
 	var bufferSize = session.statement.bufferSize
 	var limit = session.statement.LimitN
 	if limit > 0 && bufferSize > limit {
@@ -73,6 +69,11 @@ func (session *Session) bufferIterate(bean interface{}, fun IterFunc) error {
 	v := rValue(bean)
 	sliceType := reflect.SliceOf(v.Type())
 	var idx = 0
+	session.autoResetStatement = false
+	defer func() {
+		session.autoResetStatement = true
+	}()
+
 	for {
 		slice := reflect.New(sliceType)
 		if err := session.Limit(bufferSize, start).find(slice.Interface(), bean); err != nil {

session_iterate_test.go

@@ -89,4 +89,15 @@ func TestBufferIterate(t *testing.T) {
 	})
 	assert.NoError(t, err)
 	assert.EqualValues(t, 7, cnt)
+
+	cnt = 0
+	err = testEngine.Where("id <= 10").BufferSize(2).Iterate(new(UserBufferIterate), func(i int, bean interface{}) error {
+		user := bean.(*UserBufferIterate)
+		assert.EqualValues(t, cnt+1, user.Id)
+		assert.EqualValues(t, true, user.IsMan)
+		cnt++
+		return nil
+	})
+	assert.NoError(t, err)
+	assert.EqualValues(t, 10, cnt)
 }