Entity Framework 6 迁移是否可以包含围绕脚本的事务？

Question

非常简单的问题，我在实体框架 6 中使用迁移，并且喜欢命令

update-database -script

但是有没有一种方法可以生成脚本但将其与事务包装在一起？

问题是如果脚本失败，我必须取消它

Answer 1

这是我仅在发布模式下用来生成脚本的：

public class MigrationScriptBuilder : SqlServerMigrationSqlGenerator
{
#if !DEBUG
    protected override void Generate(SqlOperation sqlOperation)
    {
        Statement("GO");

        base.Generate(sqlOperation);

        Statement("GO");
    }

    public override IEnumerable<MigrationStatement> Generate(IEnumerable<MigrationOperation> migrationOperations, string providerManifestToken)
    {
        yield return new MigrationStatement {Sql = "BEGIN TRAN"};

        foreach (var migrationStatement in base.Generate(migrationOperations, providerManifestToken))
        {
            yield return migrationStatement;
        }

        yield return new MigrationStatement {Sql = "COMMIT TRAN"};
    }
#endif
}

你应该把它连接到你的DatabaseMigrationsConfiguration。示例：

public sealed class DatabaseMigrationsConfiguration : DbMigrationsConfiguration<DatabaseContext>
{
    public DatabaseMigrationsConfiguration()
    {
        SetSqlGenerator("System.Data.SqlClient", new MigrationScriptBuilder());
    }
}