orm add test about CustomField

@@ -3,6 +3,7 @@ package orm
 import (
 	"fmt"
 	"os"
+	"strings"
 	"time"
 
 	_ "github.com/go-sql-driver/mysql"
@@ -10,6 +11,56 @@ import (
 	_ "github.com/mattn/go-sqlite3"
 )
 
+// A true/false field.
+type SliceStringField []string
+
+func (e SliceStringField) Value() []string {
+	return []string(e)
+}
+
+func (e *SliceStringField) Set(d []string) {
+	*e = SliceStringField(d)
+}
+
+func (e *SliceStringField) Add(v string) {
+	*e = append(*e, v)
+}
+
+func (e *SliceStringField) String() string {
+	return strings.Join(e.Value(), ",")
+}
+
+func (e *SliceStringField) FieldType() int {
+	return TypeCharField
+}
+
+func (e *SliceStringField) SetRaw(value interface{}) error {
+	switch d := value.(type) {
+	case []string:
+		e.Set(d)
+	case string:
+		if len(d) > 0 {
+			parts := strings.Split(d, ",")
+			v := make([]string, 0, len(parts))
+			for _, p := range parts {
+				v = append(v, strings.TrimSpace(p))
+			}
+			e.Set(v)
+		}
+	default:
+		return fmt.Errorf("<SliceStringField.SetRaw> unknown value `%v`", value)
+	}
+	return nil
+}
+
+func (e *SliceStringField) RawValue() interface{} {
+	return e.String()
+}
+
+func (e *SliceStringField) Clean() error {
+	return nil
+}
+
 type Data struct {
 	Id       int
 	Boolean  bool
@@ -78,6 +129,7 @@ type User struct {
 	Posts      []*Post   `orm:"reverse(many)" json:"-"`
 	ShouldSkip string    `orm:"-"`
 	Nums       int
+	Langs      SliceStringField `orm:"size(100)"`
 }
 
 func (u *User) TableIndex() [][]string {

@@ -472,6 +472,23 @@ The program—and web server—godoc processes Go source files to extract docume
 	}
 }
 
+func TestCustomField(t *testing.T) {
+	user := User{Id: 2}
+	err := dORM.Read(&user)
+	throwFailNow(t, err)
+
+	user.Langs = append(user.Langs, "zh-CN", "en-US")
+	_, err = dORM.Update(&user, "Langs")
+	throwFailNow(t, err)
+
+	user = User{Id: 2}
+	err = dORM.Read(&user)
+	throwFailNow(t, err)
+	throwFailNow(t, AssertIs(len(user.Langs), 2))
+	throwFailNow(t, AssertIs(user.Langs[0], "zh-CN"))
+	throwFailNow(t, AssertIs(user.Langs[1], "en-US"))
+}
+
 func TestExpr(t *testing.T) {
 	user := &User{}
 	qs := dORM.QueryTable(user)
@@ -728,7 +745,7 @@ func TestValues(t *testing.T) {
 	var maps []Params
 	qs := dORM.QueryTable("user")
 
-	num, err := qs.Values(&maps)
+	num, err := qs.OrderBy("Id").Values(&maps)
 	throwFail(t, err)
 	throwFail(t, AssertIs(num, 3))
 	if num == 3 {
@@ -736,7 +753,7 @@ func TestValues(t *testing.T) {
 		throwFail(t, AssertIs(maps[2]["Profile"], nil))
 	}
 
-	num, err = qs.Values(&maps, "UserName", "Profile__Age")
+	num, err = qs.OrderBy("Id").Values(&maps, "UserName", "Profile__Age")
 	throwFail(t, err)
 	throwFail(t, AssertIs(num, 3))
 	if num == 3 {
@@ -750,7 +767,7 @@ func TestValuesList(t *testing.T) {
 	var list []ParamsList
 	qs := dORM.QueryTable("user")
 
-	num, err := qs.ValuesList(&list)
+	num, err := qs.OrderBy("Id").ValuesList(&list)
 	throwFail(t, err)
 	throwFail(t, AssertIs(num, 3))
 	if num == 3 {
@@ -758,7 +775,7 @@ func TestValuesList(t *testing.T) {
 		throwFail(t, AssertIs(list[2][9], nil))
 	}
 
-	num, err = qs.ValuesList(&list, "UserName", "Profile__Age")
+	num, err = qs.OrderBy("Id").ValuesList(&list, "UserName", "Profile__Age")
 	throwFail(t, err)
 	throwFail(t, AssertIs(num, 3))
 	if num == 3 {