Add StructSetValue func

struct.go

@@ -9,6 +9,28 @@ import (
 	"go.mongodb.org/mongo-driver/v2/bson"
 )
 
+// StructSetValue will update the value of the given field of struct o.
+func StructSetValue(o any, field string, value any) {
+	ref := reflect.ValueOf(o).Elem()
+
+  if ref.Kind() == reflect.Ptr {
+    ref = reflect.Indirect(ref)
+	}
+
+	if ref.Kind() == reflect.Interface {
+    ref = ref.Elem()
+	}
+
+	if ref.Kind() == reflect.Struct {
+		f := ref.FieldByName(field)
+
+		if f.IsValid() && f.CanSet() {
+			f.Set(reflect.ValueOf(value))
+		}
+	}
+}
+
+
 func StructToStruct(source any, target any) {
 	mapstructure.Decode(source, &target)
 }

struct_test.go

@@ -4,6 +4,26 @@ import (
   "testing"
 )
 
+func TestStructSetValue(t *testing.T) {
+  type O struct {
+    Name string
+    Age int
+    Active bool
+  }
+
+  o := &O{
+    Name: "Nick",
+    Age: 15,
+    Active: true,
+  }
+
+  StructSetValue(o, "Name", "George")
+
+  if o.Name != "George" {
+    t.Fatalf("Name should have been George not %s", o.Name)
+  }
+}
+
 func TestStructToStruct(t *testing.T) {
   type O struct {
     Name string