Fix for #85

marshal.go

@@ -3,6 +3,7 @@ package quickfix
 import (
 	"reflect"
 	"strconv"
+	"strings"
 	"time"
 )
 
@@ -64,18 +65,29 @@ func (e encoder) encodeValue(fixTag Tag, v reflect.Value, omitEmpty bool, defaul
 			panic("repeating group must be a slice of type struct")
 		}
 
-		template := make(GroupTemplate, elem.NumField())
-		for i := 0; i < elem.NumField(); i++ {
-			sf := elem.Field(i)
-			fixTag, err := strconv.Atoi(sf.Tag.Get("fix"))
+		template := make(GroupTemplate, 0)
 
-			if err != nil {
-				panic(err)
-			}
+		var walkFunc func(t reflect.Type)
+
+		walkFunc = func(t reflect.Type) {
+			for i := 0; i < t.NumField(); i++ {
+				sf := t.Field(i)
+				if sf.Anonymous {
+					walkFunc(sf.Type)
+					continue
+				}
+				afixTag, err := strconv.Atoi(strings.Split(sf.Tag.Get("fix"), ",")[0])
+
+				if err != nil {
+					panic(err)
+				}
 
-			template[i] = GroupElement(Tag(fixTag))
+				template = append(template, GroupElement(Tag(afixTag)))
+			}
 		}
 
+		walkFunc(elem)
+
 		repeatingGroup := RepeatingGroup{Tag: fixTag, GroupTemplate: template}
 
 		for i := 0; i < v.Len(); i++ {

marshal_test.go

@@ -179,9 +179,14 @@ func TestMarshal_RepeatingGroups(t *testing.T) {
 		StringField2 *string `fix:"9"`
 	}
 
+	type AnonymousGroup struct {
+		IntField3 int `fix:"3"`
+	}
+
 	type Group2 struct {
 		IntField1 int `fix:"1"`
-		IntField2 int `fix:"2"`
+		IntField2 int `fix:"2, omitempty"`
+		AnonymousGroup
 	}
 
 	type Message struct {
@@ -195,7 +200,7 @@ func TestMarshal_RepeatingGroups(t *testing.T) {
 	m := Message{
 		GroupField1: []Group1{{StringField1: "hello", StringField2: &s}, {StringField1: "goodbye"}, {StringField1: "OHHAI", StringField2: &s}},
 		StringField: "world",
-		GroupField2: []Group2{{IntField1: 1, IntField2: 42}},
+		GroupField2: []Group2{{IntField1: 1, IntField2: 42, AnonymousGroup: AnonymousGroup{IntField3: 44}}},
 	}
 	fixMsg := quickfix.Marshal(m)
 
@@ -207,6 +212,7 @@ func TestMarshal_RepeatingGroups(t *testing.T) {
 	group2Template := quickfix.GroupTemplate{
 		quickfix.GroupElement(quickfix.Tag(1)),
 		quickfix.GroupElement(quickfix.Tag(2)),
+		quickfix.GroupElement(quickfix.Tag(3)),
 	}
 
 	var tests = []struct {