Support binding of anonymous struct members

bench_test.go

@@ -52,9 +52,13 @@ func BenchmarkManyFields(b *testing.B) {
 }
 
 func BenchmarkBind(b *testing.B) {
-	var u struct {
+	type Record struct {
 		ID int64 `db:"id"`
 	}
+	var u struct {
+		Record
+		Name string `db:"name"`
+	}
 
 	b.ResetTimer()
 

executor_test.go

@@ -148,6 +148,25 @@ func TestBind(t *testing.T) {
 	})
 }
 
+func TestBindNested(t *testing.T) {
+	forEveryDB(t, func(ctx context.Context, env *dbEnv) {
+		type Parent struct {
+			ID int64 `db:"id"`
+		}
+		var u struct {
+			Parent
+			Name string `db:"name"`
+		}
+		err := env.sqlf.From("users").
+			Bind(&u).
+			Where("id = ?", 2).
+			QueryRowAndClose(ctx, env.db)
+		assert.NoError(t, err, "Failed to execute a query: %v", err)
+		assert.Equal(t, "User 2", u.Name)
+		assert.EqualValues(t, 2, u.ID)
+	})
+}
+
 func TestExec(t *testing.T) {
 	forEveryDB(t, func(ctx context.Context, env *dbEnv) {
 		var (

stmt.go

@@ -644,9 +644,17 @@ func (q *Stmt) Bind(data interface{}) *Stmt {
 
 	for i := 0; i < val.NumField(); i++ {
 		field := val.Field(i)
-		dbFieldName := typ.Field(i).Tag.Get("db")
-		if dbFieldName != "" {
-			q.Select(dbFieldName).To(field.Addr().Interface())
+		switch field.Kind() {
+		case reflect.Struct:
+			t := typ.Field(i)
+			if t.Anonymous {
+				q.Bind(field.Addr().Interface())
+			}
+		default:
+			dbFieldName := typ.Field(i).Tag.Get("db")
+			if dbFieldName != "" {
+				q.Select(dbFieldName).To(field.Addr().Interface())
+			}
 		}
 	}
 	return q

stmt_test.go

@@ -256,3 +256,22 @@ func TestLimit(t *testing.T) {
 	assert.Equal(t, "SELECT id FROM items WHERE id > ? LIMIT ?", q.String())
 	assert.Equal(t, []interface{}{42, 20}, q.Args())
 }
+
+func TestBindStruct(t *testing.T) {
+	type Parent struct {
+		ID      int64 `db:"id"`
+		Skipped string
+	}
+	var u struct {
+		Parent
+		Name  string `db:"name"`
+		Extra int64
+	}
+	q := sqlf.From("users").
+		Bind(&u).
+		Where("id = ?", 2)
+	defer q.Close()
+	assert.Equal(t, "SELECT id, name FROM users WHERE id = ?", q.String())
+	assert.Equal(t, []interface{}{2}, q.Args())
+	assert.EqualValues(t, []interface{}{&u.ID, &u.Name}, q.Dest())
+}