Question

我正在使用Entity Framework在Windows窗体中为每个租户应用开发一个多租户数据库。我为这样的新租户创建了一个新的数据库：

var ctx = new VentasDBContext("data source=DESKTOP-JSIT42C\\SQLEXPRESS; initial catalog=VentasDBContext; integrated security=SSPI");
Models.Helpers.DatabaseOperations.MigrateDatabase(ctx);

public static void MigrateDatabase(VentasDBContext ctx)
    {


        var newDbConnString = "data source=DESKTOP-JSIT42C\\SQLEXPRESS; initial catalog=Test; integrated security=SSPI";//context.Database.Connection.ConnectionString;
        var connStringBuilder = new SqlConnectionStringBuilder(newDbConnString);
        //var newDbName = connStringBuilder.InitialCatalog;

        connStringBuilder.InitialCatalog = "Test";

        ConfigurationVentas config = new ConfigurationVentas();
        DbMigrator migrator = new DbMigrator(config);

        //VentasDBContext ctx = new VentasDBContext();
        ctx.Database.Create();

        Console.WriteLine("Past migrations:");
        foreach (string s in migrator.GetDatabaseMigrations())
            Console.WriteLine(s);

        Console.WriteLine("Local migrations:");
        foreach (string s in migrator.GetLocalMigrations())
            Console.WriteLine(s);

        Console.WriteLine("Pending migrations:");
        foreach (string s in migrator.GetPendingMigrations())
            Console.WriteLine(s);

        Console.WriteLine("Migrating...");
        foreach (string s in migrator.GetLocalMigrations())//GetPendingMigrations())
        {
            //Act
            Console.WriteLine("Applying migration {0}", s);
            Action act = () => migrator.Update(s);

            //Assert
            //act.ShouldNotThrow();
        }
    }

我正在创建这样的上下文：

    public VentasDBContext(string connectionString) : base(connectionString)
    {
        var migrationConfig = new MigrationConf();

        Database.SetInitializer<VentasDBContext>(
            new MigrateDatabaseToLatestVersion<
                VentasDBContext, MigrationConf>(true, migrationConfig));
    }

现在有效。问题是，然后，我创建一个Update-Database，然后再次运行所有迁移。当我尝试查询数据库时，我收到以下错误：

System.Data.SqlClient.SqlException：'已经有一个名为的对象数据库中的“AuditEntries”。

就像它试图再次创建所有表格一样。

我很抱歉这个长度，我会感激任何帮助！

EF：当使用带有连接字符串的上下文作为参数时，我收到错误

0 个答案: