WIP: Refactor - delete dml

exec/exec.go

@@ -172,7 +172,7 @@ func NewUpdate[T any](orm *simpleorm.ORM, toUpdate T) (Update[T], error) {
 }
 
 func (u Update[T]) Execute(conn *simpleorm.DBConnection) ([]T, error) {
-	dml, err := u.target.GetUpdateDML(u.toUpdate)
+	dml, err := u.target.GetUpdateDML()
 	if err != nil {
 		return []T{}, err
 	}
@@ -206,6 +206,60 @@ func (u Update[T]) Execute(conn *simpleorm.DBConnection) ([]T, error) {
 	return []T{u.toUpdate}, nil
 }
 
+type Delete[T any] struct {
+	target   schema.Table
+	toDelete []T
+}
+
+func NewDelete[T any](orm *simpleorm.ORM, toDelete []T) (Delete[T], error) {
+	table, ok := orm.Cache().Get(reflect.TypeFor[T]().Name())
+	if !ok {
+		return Delete[T]{}, errors.New("Failed to get table from schema cache")
+	}
+
+	return Delete[T]{target: *table, toDelete: toDelete}, nil
+}
+
+func (d Delete[T]) Execute(conn *simpleorm.DBConnection) ([]T, error) {
+	count := len(d.toDelete)
+	dml, err := d.target.GetDeleteDML(count)
+	if err != nil {
+		return []T{}, err
+	}
+
+	var params []any
+
+	for _, del := range d.toDelete {
+		pkCols, err := getPk(del, d.target)
+		if err != nil {
+			return []T{}, err
+		}
+
+		for _, pk := range pkCols {
+			params = append(params, pk)
+		}
+	}
+
+	log.LogInfo("%s [%s]", dml, params)
+
+	stmt, err := conn.Prepare(dml)
+	if err != nil {
+		return []T{}, err
+	}
+	defer stmt.Close()
+
+	result, err := stmt.Exec(params...)
+	if err != nil {
+		return []T{}, err
+	} else {
+		rowsAffected, _ := result.RowsAffected()
+		log.LogInfo("Deleted %s row", rowsAffected)
+	}
+
+	return d.toDelete, nil
+
+}
+
 func createSelectResultContainer(t schema.Table) []any {
 	vals := make([]any, t.Type.NumField())
 	for i := range vals {