Question

我正在尝试运行渡槽的命令来生成数据库。

aqueduct db generate

但我总是收到此错误：

Bad state: type '_SpecialTypeMirror' is not a subtype of type 'ClassMirror' in type cast

我正在使用这样的模型：导入'package：aqueduct / aqueduct.dart'; 导入'package：controle_rural_api / models / Farm.dart';

类用户扩展ManagedObject实现_User {}

class _User {

  @primaryKey
  int id;
  String otherThings;
  bool active;

  ManagedSet<Farm> farms;
}

那是完整的错误：

*** Uncaught error
    Bad state: type '_SpecialTypeMirror' is not a subtype of type 'ClassMirror' in type cast
  **** Stacktrace
  * #0      EntityBuilder._getTableDefinitionForType (package:aqueduct/src/db/managed/builders/entity_builder.dart:236:16)
  * #1      new EntityBuilder (package:aqueduct/src/db/managed/builders/entity_builder.dart:16:31)
  * #2      new DataModelBuilder.<anonymous closure> (package:aqueduct/src/db/managed/builders/data_model_builder.dart:7:42)
  * #3      MappedListIterable.elementAt (dart:_internal/iterable.dart:414:29)
  * #4      ListIterable.toList (dart:_internal/iterable.dart:219:19)
  * #5      new DataModelBuilder (package:aqueduct/src/db/managed/builders/data_model_builder.dart:7:71)
  * #6      new ManagedDataModel.fromCurrentMirrorSystem (package:aqueduct/src/db/managed/data_model.dart:46:9)
  * #7      MigrationBuilderExecutable.execute (<data:application/dart>:13:557)
  * <asynchronous suspension>
  * #8      main (<data:application/dart>:9:35)
  * <asynchronous suspension>
  * #9      _startIsolate.<anonymous closure> (dart:isolate/runtime/libisolate_patch.dart:296:32)
  * #10     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
  ****

看起来与我的代码无关，但是我无法生成代码，可以做什么？

Answer 1

我发现了错误。在泛型中。

在class User extends ManagedObject implements _User{}中我忘记了类型，所以应该像这样：class User extends ManagedObject<_User> implements _User{}

错误状态：类型转换中，类型'_SpecialTypeMirror'不是类型'ClassMirror'的子类型

1 个答案: