使用带有命名参数的Sybase asa9进行nhibernate

时间:2011-12-23 17:05:04

标签: c# nhibernate sybase-asa

尝试让NHibernate与Sybase ASA9一起使用,并且在命名参数出错时抛出错误:

Invalid index 0 for this AsaParameterCollection with Count=0.

我尝试过使用NHibernate ODBC驱动程序和当前的ASA驱动程序。我可以直接查询没有参数,所以我知道连接正在发生。看来这个参数没有正确传递给ASA,但我一直在搞清楚我是做错了什么,或者这只是NH和ASA的一个问题。为了达到这个目的,我们有点头疼,也许这也将有助于未来的某些人。该值是正确的,并且在生成的sql的最后一个片段中可见,并且查询以等于问号结束,这似乎是有效的Sybase,只是不清楚它在哪里发生故障。

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
  <session-factory>
    <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
    <property name="dialect">NHibernate.Dialect.SybaseASA9Dialect</property>
    <property name="connection.driver_class">NHibernate.Driver.SybaseAsaClientDriver</property>
    <property name="connection.connection_string">Uid=;Pwd=;Dsn=</property>
    <property name="hbm2ddl.keywords">none</property><!--could cause problems? update needed when going to sybase driver instead of odbc-->
    <property name="show_sql">true</property>
    <!-- mapping files -->
    <mapping resource="domain.table.hbm.xml" assembly="Label3700" />-->
  </session-factory>
</hibernate-configuration>

映射

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
               assembly="Label3700"
               namespace="Label3700.Domain">

<class name="menu_item" table="micros.mi_def">
     <id name="mi_seq">
       <column name="mi_seq" sql-type="integer" not-null="true"/>
       <generator class="identity" />
     </id>
     <property name="obj_num" />
     <property name="name_1" />
     <property name="fam_grp_seq" />
   </class>
</hibernate-mapping>

public class menu_item
{
    public virtual int mi_seq { get; set; }
    public virtual int obj_num { get; set; }
    public virtual string name_1 { get; set; }
    public virtual int fam_grp_seq { get; set; }
}

查询

IList<menu_item> mi = session.CreateQuery("FROM menu_item m where m.fam_grp_seq = :famGrpSeq")
.SetParameter("famGrpSeq", familyGroupSeq)
.List<menu_item>();

错误

could not execute query
[ select menu_item0_.mi_seq as mi1_1_, menu_item0_.obj_num as obj2_1_,menu_item0_.name_1 as name3_1_, menu_item0_.fam_grp_seq as fam4_1_ from micros.mi_def menu_item0_ where menu_item0_.fam_grp_seq=? ]
Name:famGrpSeq - Value:44
[SQL: select menu_item0_.mi_seq as mi1_1_, menu_item0_.obj_num as obj2_1_,menu_item0_.name_1 as name3_1_, menu_item0_.fam_grp_seq as fam4_1_ from micros.mi_def menu_item0_ where menu_item0_.fam_grp_seq=?]

1 个答案:

答案 0 :(得分:0)

您需要创建自定义连接驱动程序,因为默认连接驱动程序使用了错误的设置。升级到更新版本的NHibernate可能会消除这个问题。

在我的sybase连接驱动程序中,我已经覆盖了这些属性:

public class SqlAnywhereConnectionDriver : ReflectionBasedDriver
{
    //other code removed…
    public override bool UseNamedPrefixInSql
    {
        get { return true; }
    }

    public override bool UseNamedPrefixInParameter
    {
        get { return true; }
    }

    public override string NamedPrefix
    {
        get { return ":"; }
    }
}