parser: fix orm generic struct table type parsing (fix #24049) (#24149)

vlib/orm/orm_generic_test.v

@@ -0,0 +1,46 @@
+// vtest build: present_sqlite3? && !sanitize-memory-clang
+import db.sqlite
+
+pub enum MessageStatus as u8 {
+	ready
+}
+
+pub struct Message[T] {
+	message_id int @[primary; sql: serial]
+	status     MessageStatus
+}
+
+pub struct Queue[T] {
+	conn &sqlite.DB
+}
+
+pub struct Queue_config {
+	path string
+	db   ?sqlite.DB @[omitempty]
+}
+
+pub fn new[T](config Queue_config) !Queue[T] {
+	mut conn := if db := config.db {
+		db
+	} else {
+		sqlite.connect(config.path) or { return error('Failed to connect to database: ${err}') }
+	}
+	mut queue := Queue[T]{
+		conn: &conn
+	}
+	return queue
+}
+
+pub fn (mut self Queue[T]) take() !Message[T] {
+	messages := sql self.conn {
+		select from Message[T] where status == MessageStatus.ready order by message_id limit 1
+	} or { return error('') }
+	message := messages.first()
+	return message
+}
+
+struct Payload {}
+
+fn test_main() {
+	_ := new[Payload](path: ':memory:')!
+}

vlib/v/parser/orm.v

@@ -101,6 +101,8 @@ fn (mut p Parser) sql_expr() ast.Expr {
 
 	if is_count {
 		typ = ast.int_type
+	} else if table_type.has_flag(.generic) {
+		typ = ast.new_type(p.table.find_or_register_array(table_type)).set_flag(.generic)
 	} else {
 		typ = ast.new_type(p.table.find_or_register_array(table_type))
 	}