Question

我对Sqlite和Nhibernate有很大的疑问。我编写了一个小型控制台应用程序来测试内存数据库的不同设置。我可以使用Raw SQL提交插入数据，甚至可以使用NHibernate在会话内部添加数据。我也可以通过打开SQLiteConnection和原始SQL来检索数据，但是当我尝试通过Session.get()获取对象时，它总是返回null。

这是我的配置：

Configuration cfg = new Configuration();


string connectionString = @"FullUri=file:memorydb.db?mode=memory&cache=shared";

IDictionary<string, string> props = new Dictionary<string,string>();

props.Add("connection.provider","NHibernate.Connection.DriverConnectionProvider");
props.Add("connection.connection_string", connectionString);
props.Add("connection.driver_class","NHibernate.Driver.SQLite20Driver");
props.Add("dialect", "NHibernate.Dialect.SQLiteDialect");
props.Add("connection.release_mode", "on_close");
props.Add("ProxyFactoryFactoryClass","NHibernate.ByteCode.Castle.ProxyFactoryFactory,NHibernate.ByteCode.Castle");
props.Add("show_sql", "true");

cfg.SetProperties(props);

cfg.AddAssembly("ConsoleApp2");

SQLiteConnection conn = new SQLiteConnection(@"FullUri=file:memorydb.db");
conn.Open();

Teacher teacher = new Teacher();
teacher.Id = 1223;
teacher.Name = "Test";
ISessionFactory factory = cfg.BuildSessionFactory();

这是我的XML映射：

<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
    assembly="ConsoleApp2"
    namespace="ConsoleApp2.Domain"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="urn:nhibernate-mapping-2.2 ../nhibernate-mapping.xsd">
    <class name="Teacher" table="Teacher">
        <id name="Id" column="Id" type="Int32">
            <generator class="hilo" />
        </id>
        <property name="Name">
            <column name="Name" sql-type="nvarchar" not-null="true" />
        </property>
    </class>
</hibernate-mapping>

我的会话范围：使用（ISession会话= factory.OpenSession（）） { 使用（var tx = session.BeginTransaction（）） { SchemaExport导出=新的SchemaExport（cfg）; export.Execute（false，true，false，session.Connection，null）; tx.Commit（）; }

    using (var test = session.BeginTransaction())
    {
        session.Save(teacher);
        test.Commit();
    }

    using (SQLiteConnection connection = new SQLiteConnection(@"FullUri=file:memorydb.db?mode=memory&cache=shared"))
    {
        connection.Open(); ;
        string sql = "PRAGMA table_info('Teacher');";
        SQLiteCommand cmd = new SQLiteCommand(sql, connection);
        SQLiteDataReader reader = cmd.ExecuteReader();
        while (reader.Read())
        {
            Console.WriteLine(reader.GetName(0));
        }
    }

    using (SQLiteConnection connection = new SQLiteConnection(@"FullUri=file:memorydb.db?mode=memory&cache=shared"))
    {

        connection.Open(); ;
        string sql = "SELECT * From Lehrer";
        SQLiteCommand cmd = new SQLiteCommand(sql, connection);
        SQLiteDataReader reader = cmd.ExecuteReader();
        while (reader.Read())
        {
            Console.WriteLine(reader.GetValue(1));
        }
        }

    var y = session.Get<ITeacher>(1223);
}

正如我所说，这只是一个测试解决方案。我试图让我的测试用例在单个会话中可运行。我知道那里有很多教程/指南等，但是我发现没有一个可以解决在内存数据库中植入testdata并在同一会话中执行测试的问题。

SQLite Session.get返回null

0 个答案: