Nested Transactions with MySQL and Entity Framework Core - mysql

Question

I'm using MySQL with EF Core. I am currently using Pomelo Provider for MySQL. I need to implement Unit Of Work Pattern for transactions. I have a Service which calls two methods in repository. I am not able to implement nested transactions. This is how my method in service looks now:
public void methodA(param)
{
using (TransactionScope tx = new
TransactionScope(TransactionScopeOption.Required))
{
repo1.save(data1);
repo2.save(data2);
tx.complete();
}
}
This is how save method in repo1 is implemented
private readonly UserDbContext appDbContext;
public repo1(UserDbContext _appDbContext)
{
appDbContext = _appDbContext;
}
public void save(User entity)
{
var dbset = appDbContext.Set<User>().Add(entity);
appDbContext.SaveChanges();
}
This is how save method in repo2 is implemented
private readonly UserDbContext appDbContext;
public repo2(UserDbContext _appDbContext)
{
appDbContext = _appDbContext;
}
public void save(UserRole entity)
{
var dbset = appDbContext.Set<UserRole>().Add(entity);
appDbContext.SaveChanges();
}
I am getting the following error while running method in service:
Error generated for warning 'Microsoft.EntityFrameworkCore.Database.Transaction.AmbientTransactionWarning: An ambient transaction has been detected. The current provider does not support ambient transactions. See http://go.microsoft.com/fwlink/?LinkId=800142'. This exception can be suppressed or logged by passing event ID 'RelationalEventId.AmbientTransactionWarning' to the 'ConfigureWarnings' method in 'DbContext.OnConfiguring' or 'AddDbContext'.
This is how I registered UserDbContext in Startup.cs
services.AddDbContext<UserDbContext>(options => options.UseLazyLoadingProxies().UseMySql("Server = xxxx; Database = xxx; Uid = xx;ConnectionReset=True;", b => b.MigrationsAssembly("AssemblyName")));
I even tried adding a middleware which starts transaction at the begining of request and commits/rollbacks during the response . But still I am not able to manage nested transactions.
This is how my middleware looks:
public class TransactionPerRequestMiddleware
{
private readonly RequestDelegate next_;
public TransactionPerRequestMiddleware(RequestDelegate next)
{
next_ = next;
}
public async Task Invoke(HttpContext context, UserDbContext
userDbContext)
{
var transaction = userDbContext.Database.BeginTransaction(
System.Data.IsolationLevel.ReadCommitted);
await next_.Invoke(context);
int statusCode = context.Response.StatusCode;
if (statusCode == 200 || statusCode==302)
{
transaction.Commit();
}
else
{
transaction.Rollback();
}
}
}
Can anyone help me please?