Make Exec possible to accepts arguments

README.md

@@ -712,7 +712,11 @@ for rows.Next() {
 ## Run Raw SQl
 
 ```go
+// Raw sql
 db.Exec("drop table users;")
+
+// Raw sql with arguments
+db.Exec("update orders set shipped_at=? where id in (?)", time.Now, []int64{11,22,33})
 ```
 
 ## Error Handling

do.go

@@ -67,12 +67,14 @@ func (s *Do) trace(t time.Time) {
 	}
 }
 
-func (s *Do) exec(sqls ...string) *Do {
+func (s *Do) raw(query string, values ...interface{}) *Do {
+	s.sql = s.buildWhereCondition(map[string]interface{}{"query": query, "args": values})
+	return s
+}
+
+func (s *Do) exec() *Do {
 	defer s.trace(time.Now())
 	if !s.db.hasError() {
-		if len(sqls) > 0 {
-			s.sql = sqls[0]
-		}
 		_, err := s.db.db.Exec(s.sql, s.sqlVars...)
 		s.err(err)
 	}
@@ -447,7 +449,7 @@ func (s *Do) buildWhereCondition(clause map[string]interface{}) (str string) {
 			id, _ := strconv.Atoi(value)
 			return s.primaryCondiation(s.addToVars(id))
 		} else {
-			str = "(" + value + ")"
+			str = value
 		}
 	case int, int64, int32:
 		return s.primaryCondiation(s.addToVars(value))

gorm_test.go

@@ -1406,7 +1406,7 @@ func TestGroup(t *testing.T) {
 }
 
 func TestHaving(t *testing.T) {
-	rows, err := db.Debug().Select("name, count(*) as total").Table("users").Group("name").Having("name IN (?)", []string{"2", "3"}).Rows()
+	rows, err := db.Select("name, count(*) as total").Table("users").Group("name").Having("name IN (?)", []string{"2", "3"}).Rows()
 
 	if err == nil {
 		defer rows.Close()
@@ -1427,6 +1427,13 @@ func TestHaving(t *testing.T) {
 	}
 }
 
+func TestExecRawSql(t *testing.T) {
+	db.Exec("update users set name=? where name in (?)", "jinzhu", []string{"1", "2", "3"})
+	if db.Where("name in (?)", []string{"1", "2", "3"}).First(&User{}).Error != RecordNotFound {
+		t.Error("Raw sql should be able to parse argument")
+	}
+}
+
 func BenchmarkGorm(b *testing.B) {
 	b.N = 2000
 	for x := 0; x < b.N; x++ {

main.go

@@ -161,8 +161,8 @@ func (s *DB) Delete(value interface{}) *DB {
 	return s.clone().do(value).begin().delete().commit_or_rollback().db
 }
 
-func (s *DB) Exec(sql string) *DB {
-	return s.clone().do(nil).exec(sql).db
+func (s *DB) Exec(sql string, values ...interface{}) *DB {
+	return s.clone().do(nil).raw(sql, values...).exec().db
 }
 
 func (s *DB) Model(value interface{}) *DB {

search.go

@@ -2,7 +2,6 @@ package gorm
 
 import (
 	"regexp"
-
 	"strconv"
 )