Question

我有nhibernate使用oracle db，我正在尝试在内存db中使用sqlite来测试我们的查询逻辑。我相信我已经阅读，理解并确认了网络上关于这个问题的每一个答案，其中一些有几次：）

我收到SQLite错误没有这样的表：我也没有在SchemaExport调用上看到任何ddl命令

以下是我觉得相关的设置。此代码全部来自同一方法

cfg = new Configuration()
.SetProperty(Environment.ReleaseConnections, "on_close")
.SetProperty(Environment.Dialect, typeof(SQLiteDialect).AssemblyQualifiedName)
.SetProperty(Environment.ConnectionDriver, typeof(SQLite20Driver).AssemblyQualifiedName)
.SetProperty(Environment.ConnectionString, "Data Source=:memory:;Version=3;New=True")
.SetProperty(Environment.ProxyFactoryFactoryClass, typeof(ProxyFactoryFactory).AssemblyQualifiedName)
.SetProperty(Environment.ShowSql, "true")
.SetProperty(Environment.ConnectionProvider, typeof(NHibernate.Connection.DriverConnectionProvider).AssemblyQualifiedName);
cfg.AddAssembly("MyAssembly");
_sessionFactory = cfg.BuildSessionFactory();
_session = _sessionFactory.OpenSession();
new SchemaExport(cfg).Execute(true, true, false, _session.Connection, Console.Out); <--don't see any ddl commands here
var q = from c in _session.Query<ComponentGroup>()
where !c.IsDiscontinued
select c;
var z = q.ToList(); //<--get error here

我的.hbm.xml：

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping assembly="myassmebly" namespace="myns" xmlns="urn:nhibernate-mapping-2.2">
<class name="ComponentGroup" table="TBL_COMPONENT_GROUP" lazy="true" >
<id name="Id" column="N_COMPONENT_GROUP_ID" type="int">
  <generator class="native" />
</id>
<property name="AssemblyFacilityId" column="N_ASSEMBLY_FACILITY_ID" type="int" not-null="true" />
<property name="Name" column="C_COMPONENT_GROUP_NAME"    type="string" not-null="true" />
<property name="IsDiscontinued" column="N_DISCONTINUED_FLAG" type="bool" not-null="true" />
</class>
</hibernate-mapping>

我的POCO

public class ComponentGroup
{
    public virtual int Id { get; set; }
    public virtual int AssemblyFacilityId { get; set; }
    public virtual string Name { get; set; }
    public virtual bool IsDiscontinued { get; set; }
}

内在感受

  InnerException: System.Data.SQLite.SQLiteException
   Message=SQLite error
   no such table: TBL_COMPONENT_GROUP
   Source=System.Data.SQLite
   ErrorCode=-2147467259
   StackTrace:
        at System.Data.SQLite.SQLite3.Prepare(SQLiteConnection cnn, String strSql, SQLiteStatement previous, UInt32 timeoutMS, String& strRemain)
        at System.Data.SQLite.SQLiteCommand.BuildNextCommand()
        at System.Data.SQLite.SQLiteCommand.GetStatement(Int32 index)
        at System.Data.SQLite.SQLiteDataReader.NextResult()
        at System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave)
        at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
        at System.Data.SQLite.SQLiteCommand.ExecuteDbDataReader(CommandBehavior behavior)
        at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader()
        at NHibernate.AdoNet.AbstractBatcher.ExecuteReader(IDbCommand cmd)
        at NHibernate.Loader.Loader.GetResultSet(IDbCommand st, Boolean autoDiscoverTypes, Boolean callable, RowSelection selection, ISessionImplementor session)
        at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies)
        at NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies)
        at NHibernate.Loader.Loader.DoList(ISessionImplementor session, QueryParameters queryParameters)

我正在使用NHibernate 3.1.0.4版，System.Date.SQLite版本2.0.50727

Answer 1

所以修复就是要替换 new SchemaExport（cfg）.Execute（true，true，false，_session.Connection，Console.Out）; 同 new SchemaExport（cfg）.Execute（true，true，false，_session.Connection，null）;

真的不确定原因，但我添加了代码以将行插入到导出的表中，该表按预期工作。

然后我把Console.Out parm放回来并得到一个“无法写入已关闭的TextWriter”。错误。

SqLite在内存DB和NHibernate中

1 个答案: