如何比較我的兩個projectModels物件，一個來自本地值，另一個來自未來？撲

我正在嘗試比較兩個物件并查看它們是否具有相同的值，其中一個物件來自未來的 api 呼叫

ProjectModel response = await ProjectServices.fetchSingleProjectStream(
        projectId: projectId,
      );

另一個來自我呼叫onInit()的另一個 api 呼叫填充的本地值

final _projectModel = ProjectModel(
    guid: '',
    projectColor: '',
    title: '',
    tags: [],
    tasks: [],
    teamMembers: [],
  ).obs;

  fetchSingleProject() async {
    try {
      if (_projectModel.value.tasks!.isEmpty) {
        _isLoading(true);
      }
      ProjectModel response = await ProjectServices.fetchSingleProjectStream(
        projectId: projectId,
      );
      print('from local: ${_projectModel.value.tasks![0].description}');
      print('from api: ${response.tasks![0].description}');
      // var shouldReload = projectModel.tasks!
      //     .any((element) => _projectModel.value.tasks!.contains(element));
      // bool shouldReload = response.tasks == _projectModel.value.tasks;
      const DeepCollectionEquality dc = DeepCollectionEquality.unordered();
      bool shouldReload = dc.equals(
        response.tags!.toList(),
        _tagsList.toList(),
      );
      print('should the stream reload: $shouldReload');
      if (shouldReload) {
        _projectModel.value = response;
        _tagsList.assignAll(response.tags!);
      }
    } catch (e) {
      throw Get.snackbar('Opss', 'An error occourred');
    } finally {
      _isLoading(false);
    }
  }

  fetchInitialProject() async {
    try {
      _isLoading(true);
      ProjectModel response = await ProjectServices.fetchSingleProjectStream(
        projectId: projectId,
      );
      _projectModel.value = response;
      _tagsList.assignAll(response.tags!);
    } catch (e) {
      throw Get.snackbar('Error', '$e');
    } finally {
      _isLoading(false);
    }
  }

  @override
  Future<void> onInit() async {
    if (_projectModel.value.tasks!.isEmpty) await fetchInitialProject();
    super.onInit();
  }

  @override
  void onReady() {
    timer = Timer.periodic(const Duration(seconds: 3), (timer) async {
      await fetchSingleProject();
    });
    super.onReady();
  }

當我列印每個物件的值時，它們的結果相同，但結果卻是錯誤的，為什么會這樣，我該如何解決？

      print('from local: ${_projectModel.value.tasks![0].description}');
      print('from api: ${response.tasks![0].description}');
---
flutter: from local: This is an autogenerated #tbd, @ShemsedinRaketa
flutter: from api: This is an autogenerated #tbd, @ShemsedinRaketa
---

嘗試比較tasksList的方法 1 ：

bool shouldReload = response.tasks == _projectModel.value.tasks;

// returns false

嘗試比較tasksList的方法 2 ：

// importing form the collection package
      const DeepCollectionEquality dc = DeepCollectionEquality.unordered();
      bool shouldReload = dc.equals(
        response.tags!.toList(),
        _tagsList.toList(),
      );
// returns false as well

嘗試比較tasksList的方法 3 ：

      var shouldReload = projectModel.tasks!
          .any((element) => _projectModel.value.tasks!.contains(element));
// even if all the values are not the same it still returns true when 
// only one of the values matches
// flutter: from local: This is an autogenerated #tbd,
// @ShemsedinRaketa
// flutter: from api: This is an autogenerated #tbd, @ShemsedinRaketa poakdhmnbs
// flutter: should the stream reload: true

我想要實作的是一個流，我希望能夠控制何時加載來自 api 的新資料，何時不加載，即來自 api 的資料與本地然后不要更新用戶界面。

uj5u.com熱心網友回復：

bool areEqual(List<Person> a, List<Person> b){
  for(int i = 0;i<a.length;i  ){
    if(a[i].id != b[i].id){
      return false;
    }
  }
  return true;
}

void main(){
List<Person> a = [Person(),Person()];
List<Person> b = [Person(),Person()];
}

這就是您的函式的樣子，但是將其更改為您的 Objects 而不是 Person 并且 value 不是 id，而是為您描述

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