如何从我的Orchard模块获取数据

Question

我不知道为什么我的模块无法从数据库中查询数据。这是我的代码，var日志总是返回null。该表是在数据库中创建的，我在。中插入了3条记录。

    private readonly IRepository<AuditLogs> _UserLogsRepository;

    private readonly ICacheManager _cacheManager;
    private readonly ISignals _signals;

    public UserLogsService(
        IRepository<AuditLogs> projectRepository,
        IEnumerable<IPermissionProvider> permissionProviders,
        ICacheManager cacheManager,
        ISignals signals
        )
    {
        _UserLogsRepository = projectRepository;
        _cacheManager = cacheManager;
        _signals = signals;
        Logger = NullLogger.Instance;
        T = NullLocalizer.Instance;
    }

    public Localizer T { get; set; }
    public ILogger Logger { get; set; }

    private void TriggerSignal()
    {
        _signals.Trigger(SignalName);
    }

 public IEnumerable<AuditLogs> GetProjects()
    {
        var logs = from log in _UserLogsRepository.Table select log;

        return logs.ToList();
    }

这是我的模特

 public class AuditLogs
{
    public virtual int id { get; set; }
    public virtual string module_name { get; set; }
    public virtual string username { get; set; }
    public virtual DateTime datetime { get; set; }
    public virtual string action { get; set; }
    public virtual string note { get; set; }
    public virtual string effected_record { get; set; }
}

有人可以告诉我为什么？感谢