support OrderClauses for QuerySeter

client/orm/structs/clauses/order.go

@@ -8,9 +8,21 @@ const (
 	SortDescending Sort = 2
 )
 
+type OrderOption func(order *Order)
+
 type Order struct {
 	column string
 	sort   Sort
+	isRaw  bool
+}
+
+func OrderClause(options ...OrderOption) *Order {
+	o := &Order{}
+	for _, option := range options {
+		option(o)
+	}
+
+	return o
 }
 
 func (o *Order) GetColumn() string {
@@ -21,6 +33,10 @@ func (o *Order) GetSort() Sort {
 	return o.sort
 }
 
+func (o *Order) IsRaw() bool {
+	return o.isRaw
+}
+
 func ParseOrder(expressions ...string) []*Order {
 	var orders []*Order
 	for _, expression := range expressions {
@@ -39,3 +55,21 @@ func ParseOrder(expressions ...string) []*Order {
 
 	return orders
 }
+
+func OrderColumn(column string) OrderOption {
+	return func(order *Order) {
+		order.column = column
+	}
+}
+
+func OrderSort(sort Sort) OrderOption {
+	return func(order *Order) {
+		order.sort = sort
+	}
+}
+
+func OrderRaw(isRaw bool) OrderOption {
+	return func(order *Order) {
+		order.isRaw = isRaw
+	}
+}

client/orm/structs/clauses/order_test.go

@@ -0,0 +1,29 @@
+package clauses
+
+import "testing"
+
+func TestOrderClause(t *testing.T) {
+	var (
+		column = `a`
+		sort   = SortDescending
+		raw    = true
+	)
+
+	o := OrderClause(
+		OrderColumn(column),
+		OrderSort(sort),
+		OrderRaw(raw),
+	)
+
+	if o.GetColumn() != column {
+		t.Error()
+	}
+
+	if o.GetSort() != sort {
+		t.Error()
+	}
+
+	if o.IsRaw() != raw {
+		t.Error()
+	}
+}