simple search NOT recommended

search.dart

Future<List<String>> searchTrip(String keyword) async {
    List<String> docId = [];
    var value = await FirebaseFirestore.instance.collection('trips').get();
    value.docs.forEach((element) {
      var title = element['name'].toString().toLowerCase();
      var body = element['body'].toString().toLowerCase();
      if (body.contains(keyword)) docId.add(element.id);
      if (title.contains(keyword)) docId.add(element.id);
    });
    return docId;
  }