Question

我正在尝试将我们最大的项目之一从NHibernate 2.1更新到最新版本3.3，并且遇到了以前工作正常的查询现在抛出Antlr.Runtime.MismatchedTokenException错误的问题。

HQL：

select count(a.Student)
from ExpiringAccessArrangement a
and a.Student.IsAttending = 1

两个实体类（本例简化）：

public class Student {
    public virtual int StudentRef { get; set; }
    public virtual string Surname { get; set; }
    public virtual string Forename { get; set; }
    public virtual bool IsAttending { get; set; }
    /* other properties */
}

public class ExpiringAccessArrangement {
    public virtual Student Student { get; set; }
    public virtual DateTime DateAdded { get; set; }

    /* other properties */

    /* equality members */
}

映射（再次，本例简化）：

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="OurProduct.Model" namespace="OurProduct.Model.Core">    
    <class name="Student" table="Students">
        <id name="StudentRef" column="Student_Ref" unsaved-value="0">
            <generator class="assigned" />
        </id>
        <property name="Surname" />
        <property name="Forename" />
        <property name="IsAttending" formula="(CASE Enrolled_Code WHEN 4 THEN 1 ELSE 0 END)" />
        <!-- other properties -->
    </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="OurProduct.Model" namespace="OurProduct.Model.Core">
    <class name="ExpiringAccessArrangement" table="NonDefaultSchemaNameHere.Expiring_Access_Arrangements">
        <composite-id>
            <key-many-to-one name="Student" class="OurProduct.Model.Core.Student" column="Student_Ref" />
            <key-property name="DateAdded" column="Date_Added" />
        </composite-id>
        <!-- other properties -->
    </class>
</hibernate-mapping>

抛出的异常是：

Type: NHibernate.Hql.Ast.ANTLR.QuerySyntaxException
Message: Exception of type 'Antlr.Runtime.MismatchedTokenException' was thrown. near line 4, column 24
Source: NHibernate
Target site: Void ThrowQueryException()
Stack trace: 
   at NHibernate.Hql.Ast.ANTLR.ErrorCounter.ThrowQueryException()
   at NHibernate.Hql.Ast.ANTLR.HqlParseEngine.Parse()
   at NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(String queryString, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory)
   at NHibernate.Engine.Query.HQLStringQueryPlan..ctor(String hql, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory)
   at NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(String queryString, Boolean shallow, IDictionary`2 enabledFilters)
   at NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(String query, Boolean shallow)
   at NHibernate.Impl.AbstractSessionImpl.CreateQuery(String queryString)

也许这是一件简单的事情，但正如我上面所说，我所做的就是转向更新版本的NHibernate。据我所知和谷歌搜索能力，这应该没问题。怎么了？

Answer 1

我刚刚找到答案...查询已and，应该说where：

select count(a.Student)
from ExpiringAccessArrangement a
WHERE a.Student.IsAttending = 1

我真的不知道为什么那样有效，永远......！

使用NHibernate 3.3的Antlr.Runtime.MismatchedTokenException

1 个答案: