orm support custom multi unique / index

@@ -39,6 +39,7 @@ func getDbCreateSql(al *alias) (sqls []string) {
 
 	Q := al.DbBaser.TableQuote()
 	T := al.DbBaser.DbTypes()
+	sep := fmt.Sprintf("%s, %s", Q, Q)
 
 	for _, mi := range modelCache.allOrdered() {
 		sql := fmt.Sprintf("-- %s\n", strings.Repeat("-", 50))
@@ -49,6 +50,8 @@ func getDbCreateSql(al *alias) (sqls []string) {
 
 		columns := make([]string, 0, len(mi.fields.fieldsDB))
 
+		sqlIndexes := [][]string{}
+
 		for _, fi := range mi.fields.fieldsDB {
 
 			fieldType := fi.fieldType
@@ -120,6 +123,10 @@ func getDbCreateSql(al *alias) (sqls []string) {
 				if fi.unique {
 					column += " " + "UNIQUE"
 				}
+
+				if fi.index {
+					sqlIndexes = append(sqlIndexes, []string{column})
+				}
 			}
 
 			if strings.Index(column, "%COL%") != -1 {
@@ -129,6 +136,21 @@ func getDbCreateSql(al *alias) (sqls []string) {
 			columns = append(columns, column)
 		}
 
+		if mi.model != nil {
+			for _, names := range getTableUnique(mi.addrField) {
+				cols := make([]string, 0, len(names))
+				for _, name := range names {
+					if fi, ok := mi.fields.GetByAny(name); ok && fi.dbcol {
+						cols = append(cols, fi.column)
+					} else {
+						panic(fmt.Errorf("cannot found column `%s` when parse UNIQUE in `%s.TableUnique`", name, mi.fullName))
+					}
+				}
+				column := fmt.Sprintf("    UNIQUE (%s%s%s)", Q, strings.Join(cols, sep), Q)
+				columns = append(columns, column)
+			}
+		}
+
 		sql += strings.Join(columns, ",\n")
 		sql += "\n)"
 
@@ -136,7 +158,30 @@ func getDbCreateSql(al *alias) (sqls []string) {
 			sql += " ENGINE=INNODB"
 		}
 
+		sql += ";"
 		sqls = append(sqls, sql)
+
+		if mi.model != nil {
+			for _, names := range getTableIndex(mi.addrField) {
+				cols := make([]string, 0, len(names))
+				for _, name := range names {
+					if fi, ok := mi.fields.GetByAny(name); ok && fi.dbcol {
+						cols = append(cols, fi.column)
+					} else {
+						panic(fmt.Errorf("cannot found column `%s` when parse INDEX in `%s.TableIndex`", name, mi.fullName))
+					}
+				}
+				sqlIndexes = append(sqlIndexes, cols)
+			}
+		}
+
+		for _, names := range sqlIndexes {
+			name := strings.Join(names, "_")
+			cols := strings.Join(names, sep)
+			sql := fmt.Sprintf("CREATE INDEX %s%s%s ON %s%s%s (%s%s%s);", Q, name, Q, Q, mi.table, Q, Q, cols, Q)
+			sqls = append(sqls, sql)
+		}
+
 	}
 
 	return sqls

@@ -31,7 +31,7 @@ func newModelInfo(val reflect.Value) (info *modelInfo) {
 	ind := reflect.Indirect(val)
 	typ := ind.Type()
 
-	info.addrField = ind.Addr()
+	info.addrField = val
 
 	info.name = typ.Name()
 	info.fullName = getFullName(typ)

@@ -78,6 +78,18 @@ type User struct {
 	ShouldSkip string    `orm:"-"`
 }
 
+func (u *User) TableIndex() [][]string {
+	return [][]string{
+		[]string{"Id", "UserName"},
+	}
+}
+
+func (u *User) TableUnique() [][]string {
+	return [][]string{
+		[]string{"UserName", "Email"},
+	}
+}
+
 func NewUser() *User {
 	obj := new(User)
 	return obj

@@ -26,6 +26,38 @@ func getTableName(val reflect.Value) string {
 	return snakeString(ind.Type().Name())
 }
 
+func getTableIndex(val reflect.Value) [][]string {
+	fun := val.MethodByName("TableIndex")
+	if fun.IsValid() {
+		vals := fun.Call([]reflect.Value{})
+		if len(vals) > 0 {
+			val := vals[0]
+			if val.CanInterface() {
+				if d, ok := val.Interface().([][]string); ok {
+					return d
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func getTableUnique(val reflect.Value) [][]string {
+	fun := val.MethodByName("TableUnique")
+	if fun.IsValid() {
+		vals := fun.Call([]reflect.Value{})
+		if len(vals) > 0 {
+			val := vals[0]
+			if val.CanInterface() {
+				if d, ok := val.Interface().([][]string); ok {
+					return d
+				}
+			}
+		}
+	}
+	return nil
+}
+
 func getColumnName(ft int, addrField reflect.Value, sf reflect.StructField, col string) string {
 	column := strings.ToLower(col)
 	if column == "" {