当从 Supabase 流式传输帖子时，为什么我会在调试控制台中看到“类型‘List<dynamic>’不是类型‘List<Binding>’的子类型”？

Question

我正在使用 Flutter 和 Supabase 在我的应用程序中流式传输帖子。流媒体按预期工作，我可以毫无问题地获取和显示帖子。但是，我在调试控制台中看到以下错误：

DartError：类型错误：“JSArray”的实例：类型“List”不是类型“List”的子类型

这是我的 api 类

class ApiService {
  final SupabaseClient _supabaseClient = SupabaseClient(
      'MyURL',
      'MyAPI');

  Stream<List<PostModel>> fetchPosts() {
    try {
      return _supabaseClient.from('posts').stream(primaryKey: ['id']).asyncMap(
        (event) async {
          final response = await _supabaseClient
              .from('posts')
              .select('*,users(*),media(*)')
              .order('created_at', ascending: false) as List<dynamic>;
          final posts = response
              .cast<Map<String, dynamic>>()
              .map(
                (e) => PostModel.fromJson(e),
              )
              .toList();
          return posts;
        },
      );
    } catch (e) {
      rethrow;
    }
  }

  Future<void> addPost({required int userId, required String content}) async {
    try {
      await _supabaseClient.from('posts').insert({
        'user_id': userId,
        'content': content,
      });
    } catch (e) {
      rethrow;
    }
  }

  Future<void> deletePost({required int postId}) async {
    try {
      await _supabaseClient.from('posts').delete().eq('id', postId);
    } catch (e) {
      rethrow;
    }
  }
}

这是我的帖子模型

@freezed
class PostModel with _$PostModel {
  const factory PostModel({
    @JsonKey(name: "id") required int id,
    @JsonKey(name: "user_id") required int userId,
    @JsonKey(name: "content") required String content,
    @JsonKey(name: "created_at") required DateTime createdAt,
    @JsonKey(name: "users") required Users users,
    @JsonKey(name: "media") required List<Media> media,
  }) = _PostModel;

  factory PostModel.fromJson(Map<String, dynamic> json) =>
      _$PostModelFromJson(json);
}

用户模型

@freezed
class Users with _$Users {
  const factory Users({
    @JsonKey(name: "id") required int id,
    @JsonKey(name: "bio") required String? bio,
    @JsonKey(name: "email") required String email,
    @JsonKey(name: "state") required String? state,
    @JsonKey(name: "country") required String? country,
    @JsonKey(name: "website") required String? website,
    @JsonKey(name: "username") required String username,
    @JsonKey(name: "last_name") required String lastName,
    @JsonKey(name: "created_at") required DateTime createdAt,
    @JsonKey(name: "first_name") required String firstName,
    @JsonKey(name: "profile_picture_url") required String? profilePictureUrl,
  }) = _Users;

  factory Users.fromJson(Map<String, dynamic> json) => _$UsersFromJson(json);
}

媒体模型

@freezed
class Media with _$Media {
  const factory Media({
    @JsonKey(name: "id") required int id,
    @JsonKey(name: "url") required String url,
    @JsonKey(name: "post_id") required int postId,
    @JsonKey(name: "comment_id") required dynamic commentId,
    @JsonKey(name: "created_at") required DateTime createdAt,
  }) = _Media;

  factory Media.fromJson(Map<String, dynamic> json) => _$MediaFromJson(json);
}

Answer 1

我发现了这个问题，我还必须在 SUPABASE 中的媒体表和用户表上启用实时功能，而不仅仅是帖子表。并再次重建应用程序，这里消失了。