Question

我是ServiceStack中ORMLite的新手。我试图查询现有的MySQL数据库。我创建了这个POCO以对应我在MySQL中的表格布局：

[Alias("checks")]
public class Check
{
    [AutoIncrement]
    [PrimaryKey]
    public long check_id { get; set; }
    public long room_state_id { get; set; }
    public DateTime? entry_stamp { get; set; }
    public int student_id { get; set; }
    public string reason { get; set; }
    public string comments { get; set; }
    public long check_type_id { get; set; }
    public DateTime? check_dt { get; set; }
    public byte grace { get; set; }
    public DateTime curfew_dt { get; set; }
    public int excused_by { get; set; }
    public string status { get; set; }
    public int points { get; set; }
    public string check_class { get; set; }
    public int leave_id { get; set; }
    public DateTime night_of { get; set; }
    public DateTime violation_dt { get; set; }
    public string excused_reason { get; set; }
    public DateTime? excused_dt { get; set; }
    public sbyte imported { get; set; }
}

这是MySQL表的定义

CREATE TABLE checks (
  check_id bigint(11) NOT NULL AUTO_INCREMENT,
  room_state_id bigint(11) NOT NULL DEFAULT 0,
  entry_stamp datetime DEFAULT NULL,
  student_id int(11) NOT NULL DEFAULT 0,
  reason varchar(60) DEFAULT NULL,
  comments text DEFAULT NULL,
  check_type_id bigint(20) NOT NULL DEFAULT 0,
  check_dt datetime DEFAULT NULL,
  grace tinyint(4) UNSIGNED NOT NULL DEFAULT 0,
  curfew_dt datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  excused_by int(11) NOT NULL DEFAULT 0,
  status char(1) NOT NULL DEFAULT '',
  points int(11) NOT NULL DEFAULT 0,
  check_class char(2) NOT NULL DEFAULT '',
  leave_id int(11) NOT NULL DEFAULT 0,
  night_of date NOT NULL DEFAULT '0000-00-00',
  violation_dt datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  excused_reason varchar(255) NOT NULL DEFAULT '',
  excused_dt datetime DEFAULT '0000-00-00 00:00:00',
  imported tinyint(1) NOT NULL DEFAULT 0,
  PRIMARY KEY (check_id),
  INDEX check_class (check_class),
  INDEX check_dt (check_dt),
  INDEX check_type_id (check_type_id),
  INDEX excused_by (excused_by),
  INDEX leave_id (leave_id),
  INDEX night_of (night_of),
  INDEX status (status),
  INDEX student_id (student_id)
)

我试图使用以下方法获得一些结果：

    public object Get(GetChecks request)
    {
        return new GetChecksResponse { Results = Db.Select<Check>(q => q.student_id == request.StudentId ) };
    }

当我测试这个时，我得到一个具有正确行数的结果表，但没有填充任何数据（所有行中的所有字段都是空白或0，除了具有无意义日期的日期时间）。我怎样才能找到为什么ORMLite没有填充我的POCO？

更新：

日志记录显示了很多DateTime转换错误：

2016-01-23 15:35:53.5869|ERROR|OrmLiteWriteCommandExtensions|MySql.Data.Types.MySqlConversionException: Unable to convert MySQL date/time value to System.DateTime

at MySql.Data.Types.MySqlDateTime.GetDateTime（） at MySql.Data.MySqlClient.MySqlDataReader.GetValue（Int32 i） at MySql.Data.MySqlClient.MySqlDataReader.GetValues（Object [] values）在ServiceStack.OrmLite.OrmLiteWriteCommandExtensions.PopulateWithSqlReader [T]（T objWithProperties，IOrmLiteDialectProvider dialectProvider，IDataReader reader，Tuple`3 [] indexCache，Object [] values）

Answer 1

如果您添加logging：

LogManager.LogFactory = new ConsoleLogFactory();

您会看到错误：

ERROR: System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at System.SByte.Parse(String s, NumberStyles style, NumberFormatInfo info)
   at ServiceStack.Text.Common.DeserializeBuiltin`1.<>c.<GetParseFn>b__4_2(String value) in C:\src\ServiceStack.Text\src\ServiceStack.Text\Common\DeserializeBuiltin.cs:line 51
   at ServiceStack.OrmLite.OrmLiteConverterExtensions.ConvertNumber(IOrmLiteDialectProvider dialectProvider, Type toIntegerType, Object value) in C:\src\ServiceStack.OrmLite\src\ServiceStack.OrmLite\IOrmLiteConverter.cs:line 151
   at ServiceStack.OrmLite.OrmLiteConverterExtensions.ConvertNumber(IOrmLiteConverter converter, Type toIntegerType, Object value) in C:\src\ServiceStack.OrmLite\src\ServiceStack.OrmLite\IOrmLiteConverter.cs:line 115
   at ServiceStack.OrmLite.Converters.IntegerConverter.FromDbValue(Type fieldType, Object value) in C:\src\ServiceStack.OrmLite\src\ServiceStack.OrmLite\Converters\IntegerConverters.cs:line 25
   at ServiceStack.OrmLite.OrmLiteWriteCommandExtensions.PopulateWithSqlReader[T](T objWithProperties, IOrmLiteDialectProvider dialectProvider, IDataReader reader, Tuple`3[] indexCache, Object[] values) in C:\src\ServiceStack.OrmLite\src\ServiceStack.OrmLite\OrmLiteWriteCommandExtensions.cs:line 343

问题是MySql ADO.NET Provider将tinyint(1)作为bool返回，因此您可以通过将其更改为bool来解决问题：

public bool imported { get; set; }

ServiceStack ORMLite没有填充MySQL

1 个答案: