NHibernate的与Sybase ASA9与命名参数

Question

试图让NHibernate的与Sybase ASA9工作，并具有命名参数抛出一个错误的麻烦：

Invalid index 0 for this AsaParameterCollection with Count=0. 

我与NHibernate的ODBC驱动程序和目前ASA司机试图。我可以直接查询没有参数，所以我知道连接正在发生。看起来这个参数没有被正确地传递给ASA，但是我一直在弄清楚我是否做错了什么，或者这只是NH和ASA的问题。花了一些脑袋去抓这个，所以也许这对未来还会有帮助。该值是正确的，并且在生成的sql的最后一个片段中可见，并且查询以等号问号结束，该问号似乎是有效的Sybase，只是不清楚它在哪里崩溃。

<?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> 

类

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=?] 

Answer 1

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错误的设置。升级到更新版本的NHibernate可能会消除这个问题。

针对Sybase我连接驱动我已经重写这些属性：

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 ":"; } 
    } 
}