无法创建moor_database.g.dart文件

Question

每次我运行"build_runner watch“命令时，都会收到一个错误，即0/3操作完成后，我有所有的依赖项及其上一次更新，我试图搜索这个问题，但还没有找到任何解决方案。我希望我能在这里找到一些帮助：

flutter packages pub run build_runner watch
[INFO] Generating build script...
[INFO] Generating build script completed, took 395ms

[INFO] Creating build script snapshot......
[INFO] Creating build script snapshot... completed, took 13.4s

[INFO] Setting up file watchers...
[INFO] Setting up file watchers completed, took 12ms

[INFO] Waiting for all file watchers to be ready...
[INFO] Waiting for all file watchers to be ready completed, took 108ms

[INFO] Initializing inputs
[INFO] Building new asset graph...
[INFO] Building new asset graph completed, took 1.3s

[INFO] Checking for unexpected pre-existing outputs....
[INFO] Checking for unexpected pre-existing outputs. completed, took 2ms

[INFO] Running build...
[INFO] 1.1s elapsed, 0/3 actions completed.
[INFO] 2.1s elapsed, 0/3 actions completed.
[INFO] 5.2s elapsed, 0/3 actions completed.
[INFO] 6.3s elapsed, 0/3 actions completed.
[INFO] 11.1s elapsed, 0/3 actions completed.
[INFO] 12.3s elapsed, 0/3 actions completed.
[SEVERE] moor_generator:moor_generator on lib/db/db.dart:
Error running MoorGenerator
NoSuchMethodError: The getter 'typeConverter' was called on null.
Receiver: null
Tried calling: typeConverter
[SEVERE] moor_generator:moor_generator on lib/db/db.dart:
Error running DaoGenerator
NoSuchMethodError: The getter 'typeConverter' was called on null.
Receiver: null
Tried calling: typeConverter
[INFO] Running build completed, took 12.6s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 95ms

[SEVERE] Failed after 12.7s

Answer 1

您能试着运行以下命令吗？？运行build_runner构建--删除-冲突-输出。

Answer 2

您是否尝试删除moor_database.g.dart，然后再次运行"build_runner watch“？

Answer 3

请查看.g.dart文件名，如果我与数据库文件名完全一样，即id ur文件名是'database_helper.dart‘，那么它应该是'database_helper.g.dart’的一部分，然后才会创建g.dart文件。