c# – 与ASP.NET Identity UserManager的事务

我正在尝试更新用户.

AppUserManager appUserManager = HttpContext.GetOwinContext().GetUserManager<AppUserManager>();

AppUser member = await appUserManager.FindByIdAsync(User.Identity.GetUserId());

member.HasScheduledChanges = true;

IdentityResult identityResult = appUserManager.Update(member);

如果后续调用Web API失败,我需要回滚对用户的任何更改.我知道交易,像这样：

using (var context = HttpContext.GetOwinContext().Get<EFDbContext>())
 {
    using (var dbContextTransaction = context.Database.BeginTransaction())
    {      
        try
        {   
            // Changes

            member.HasScheduledChanges = true;

            // Would this be transactional?
            IdentityResult identityResult = appUserManager.Update(member);               

            context.SaveChanges();

            dbContextTransaction.Commit();
        }
        catch //(Exception ex)
        {

            // dbContextTransaction.Rollback(); no need to call this manually.
        }
    }
}

但是,在try块中使用AppUserManager进行的操作是否是事务性的？另外,他们使用相同的EFDbContext实例吗？换句话说,我不知道第二个代码示例开头的var context是否会被try块中的appUserManager“Update”方法调用使用.

此外,AppUserManager的创建方式如下：

public static AppUserManager Create(IdentityFactoryOptions<AppUserManager> options, IOwinContext context)
{           

    EFDbContext db = context.Get<EFDbContext>();

    AppUserManager manager = new AppUserManager(new UserStore<AppUser>(db));

    // etc.

    return manager;
}

解决方法:

示例中的EFDbContext是相同的 – 在这两种情况下,您都可以从OWIN上下文中解析它们,因此这不是问题.但是,Identity以存储无关的方式编写,这意味着存储机制可以由非SQL Server替换.这要求AppUserManager内部缺少事务.所以你需要创建自己的.

我经常在我的生产应用程序中使用var scope = new TransactionScope(TransactionScopeAsyncFlowOption.Enabled)(仅使用更多架构)：

using(var scope = new TransactionScope(TransactionScopeAsyncFlowOption.Enabled))
{
    try
    {
        AppUserManager appUserManager = HttpContext.GetOwinContext().GetUserManager<AppUserManager>();

        AppUser member = await appUserManager.FindByIdAsync(User.Identity.GetUserId());

        member.HasScheduledChanges = true;

        IdentityResult identityResult = appUserManager.Update(member);
        scope.Complete();
    }
    catch (Exception ex)
    {
        scope.Dispose();
        throw;
    }
}

标签：c,asp-net,transactions,asp-net-identity,usermanager
来源： https://codeday.me/bug/20190717/1488168.html