Question

我发现自己有点难题，希望有人在这里帮忙。

我继承了一个旧项目，它使用MigratorDotNet来部署数据库。在测试项目的部署（我们现在使用Octopus作为部署系统）时，我开始收到错误，说明代理未启用，导致应用程序失败。我创建了一个迁移以在数据库上启用代理，但是我为它创建的迁移返回一个错误，指出“在多语句事务中不允许使用ALTER DATABASE语句”。

以下是迁移：

 [CLSCompliant(false)]
[Migration(201608121015)]
public class EnableSqlServiceBroker : Migration
{
    public override void Down()
    {
        var assemblyRoot = System.Reflection.Assembly.GetExecutingAssembly().Location;
        var webConfigFileLocation = Path.Combine(assemblyRoot.Substring(0, assemblyRoot.IndexOf("\\bin")), "Web.config");
        var configuration = ConfigurationManager.OpenMappedExeConfiguration(new ExeConfigurationFileMap { ExeConfigFilename = webConfigFileLocation }, ConfigurationUserLevel.None);
        var appSettings = (configuration.GetSection("appSettings") as AppSettingsSection);

        var databaseName = appSettings.Settings[Constants.DatabaseName].Value;
        var stringBuilder = new StringBuilder()
            // Declare the BrokerEnabled variable and set it
            .AppendLine("DECLARE @BrokerEnabled bit")
            .AppendLine("SET @BrokerEnabled = 0")
            .AppendLine(
                string.Format("SELECT @BrokerEnabled =  is_broker_enabled FROM sys.databases WHERE name = '{0}'",
                    databaseName))
            .AppendLine("IF(@BrokerEnabled = 1)")
            .AppendLine("BEGIN")
            // disable the broker
            .AppendLine(string.Format("   ALTER DATABASE [{0}] SET DISABLE_BROKER", databaseName))

            .AppendLine("END");
        Database.ExecuteNonQuery(stringBuilder.ToString());
    }

    public override void Up()
    {
        var assemblyRoot = System.Reflection.Assembly.GetExecutingAssembly().Location;
        var webConfigFileLocation = Path.Combine(assemblyRoot.Substring(0, assemblyRoot.IndexOf("\\bin")), "Web.config");
        var configuration = ConfigurationManager.OpenMappedExeConfiguration(new ExeConfigurationFileMap { ExeConfigFilename = webConfigFileLocation }, ConfigurationUserLevel.None);
        var appSettings = (configuration.GetSection("appSettings") as AppSettingsSection);

        var databaseName = appSettings.Settings[Constants.DatabaseName].Value;
        var stringBuilder = new StringBuilder()
            // Declare the BrokerEnabled variable and set it
            .AppendLine("DECLARE @BrokerEnabled bit")
            .AppendLine("SET @BrokerEnabled = 0")
            .AppendLine(string.Format("SELECT @BrokerEnabled =  is_broker_enabled FROM sys.databases WHERE name = '{0}'", databaseName))
            .AppendLine("IF(@BrokerEnabled = 0)")
            .AppendLine("BEGIN")
            // enable the broker
            .AppendLine(string.Format("     ALTER DATABASE [{0}] SET ENABLE_BROKER", databaseName))

            .AppendLine("END");
        Database.ExecuteNonQuery(stringBuilder.ToString());
    }
}

我无法在不更改数据库的情况下启用代理，但我无法更改数据库，因为这显然是不允许的。有没有人知道解决这个问题的方法？或者修复它？提前谢谢。

Answer 1

您必须在更改数据库之前提交已在运行的事务。

MigratorDotNet Alter Database必需，但不能使用

1 个答案: