Fix bug didn't reset statement on update

integrations/session_find_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"xorm.io/xorm"
 	"xorm.io/xorm/internal/utils"
 	"xorm.io/xorm/names"
 
@@ -1020,3 +1021,28 @@ func TestDistinctAndCols(t *testing.T) {
 	assert.EqualValues(t, 1, len(names))
 	assert.EqualValues(t, "test", names[0])
 }
+
+func TestUpdateFind(t *testing.T) {
+	type TestUpdateFind struct {
+		Id   int64
+		Name string
+	}
+
+	assert.NoError(t, PrepareEngine())
+	assertSync(t, new(TestUpdateFind))
+
+	session := testEngine.NewSession()
+	defer session.Close()
+
+	var tuf = TestUpdateFind{
+		Name: "test",
+	}
+	_, err := session.Insert(&tuf)
+	assert.NoError(t, err)
+	_, err = session.Where("id = ?", tuf.Id).Update(&TestUpdateFind{})
+	assert.EqualError(t, xorm.ErrNoColumnsTobeUpdated, err.Error())
+
+	var tufs []TestUpdateFind
+	err = session.Where("id = ?", tuf.Id).Find(&tufs)
+	assert.NoError(t, err)
+}

session_update.go

@@ -17,6 +17,11 @@ import (
 	"xorm.io/xorm/schemas"
 )
 
+// enumerated all errors
+var (
+	ErrNoColumnsTobeUpdated = errors.New("no columns found to be updated")
+)
+
 func (session *Session) cacheUpdate(table *schemas.Table, tableName, sqlStr string, args ...interface{}) error {
 	if table == nil ||
 		session.tx != nil {
@@ -144,6 +149,8 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 		defer session.Close()
 	}
 
+	defer session.resetStatement()
+
 	if session.statement.LastError != nil {
 		return 0, session.statement.LastError
 	}
@@ -329,7 +336,7 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 	}
 
 	if len(colNames) <= 0 {
-		return 0, errors.New("No content found to be updated")
+		return 0, ErrNoColumnsTobeUpdated
 	}
 
 	condSQL, condArgs, err = session.statement.GenCondSQL(cond)