ServiceStack.OrmLite：在哪里添加运行时属性（而不是内联/设计时属性）？

Question

大约四年前，我问过这个问题。然后我决定当时不使用 OrmLite，但我现在又回到了它。

这次我想知道在哪里添加添加运行时属性的代码？我尝试如下，但运行时属性没有出现。

我错过了什么？

public ActorNotificationDbHandler()
{
    DbAccount dbAccount = DBAccounts[0];
    SetTableMeta();

    _dbFactory = new OrmLiteConnectionFactory($"Uid={dbAccount.Username};Password={dbAccount.Password};Server={dbAccount.Address};Port={dbAccount.Port};Database={dbAccount.Database}", MySqlDialect.Provider);
    _db = _dbFactory.Open();

    if (_db.CreateTableIfNotExists<ActorNotification>())
    {
        _db.Insert(new ActorNotification { CreatedTime = DateTime.Now, ToActor = 123, Status = ActorNotification.ActorNotificationStatuses.Created });
        _db.Insert(new ActorNotificationMessage { ActorNotificationId = 1, MessageState = ActorNotificationMessage.MessageStates.Created });
    }

    var result = _db.SingleById<ActorNotification>(1);
    result.PrintDump(); //= {Id: 1, Name:Seed Data}
}

private void SetTableMeta()
{
    typeof(ActorNotification).GetProperty("Id").AddAttributes(new IndexAttribute { Unique = true }, new AutoIncrementAttribute());
    typeof(ActorNotification).GetProperty("ToActor").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotification).GetProperty("CoreObjectId1").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotification).GetProperty("CoreObjectId2").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotification).GetProperty("Status").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotification).GetProperty("CreatedTime").AddAttributes(new IndexAttribute { Unique = false });

    typeof(ActorNotificationMessage).GetProperty("Id").AddAttributes(new IndexAttribute { Unique = true }, new AutoIncrementAttribute());
    typeof(ActorNotificationMessage).GetProperty("ActorNotificationId").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotificationMessage).GetProperty("FrontEndServerHandler").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotificationMessage).GetProperty("TimeCreated").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotificationMessage).GetProperty("TimeStatusChanged").AddAttributes(new IndexAttribute { Unique = false });
    typeof(ActorNotificationMessage).GetProperty("MessageState").AddAttributes(new IndexAttribute { Unique = false });
}

Answer 1

就像以前很多次一样，我在发布问题后找到了答案。但是，也许它会对其他人有所帮助。

解决方案： 将 SetTableMet() 移至创建 Db 工厂和 db 之后：

public ActorNotificationDbHandler()
{
    DbAccount dbAccount = Core.Server.SRefCoreServer.dbHandler.DBAccounts[0];
            
    _dbFactory = new OrmLiteConnectionFactory($"Uid={dbAccount.Username};Password={dbAccount.Password};Server={dbAccount.Address};Port={dbAccount.Port};Database={dbAccount.Database}", MySqlDialect.Provider);
    _db = _dbFactory.Open();
    SetTableMeta();

    if (_db.CreateTableIfNotExists<ActorNotification>())
    {
        _db.Insert(new ActorNotification { CreatedTime = DateTime.Now, ToActor = 123, Status = ActorNotification.ActorNotificationStatuses.Created });
        _db.Insert(new ActorNotificationMessage { ActorNotificationId = 1, MessageState = ActorNotificationMessage.MessageStates.Created });
    }

    var result = _db.SingleById<ActorNotification>(1);
    result.PrintDump(); //= {Id: 1, Name:Seed Data}
}

Answer 2

您通常不必执行此操作（因为在使用任何独立 ServiceStack 库时会自动调用它），但如果您要添加运行时属性，则需要确保通过调用 JsConfig 来调用 ServiceStack.Text 静态构造函数。手动 InitStatics()，例如：

private void SetTableMeta()
{
    JsConfig.InitStatics();
    //...
}

否则，

OrmLiteConnectionFactory

也会在其构造函数中调用它，以便您可以在初始化

__dbFactory

后初始化任何运行时属性，例如：

_dbFactory = new OrmLiteConnectionFactory(...); SetTableMeta();

_db = _dbFactory.Open();