Edit & Delete object with ViewModel - asp.net-mvc

Question

I've successfully implemented a viewmodel so I can create and return items from my database using two tables. My issue is editing and deleting individual items.
I was able to edit/delete when I was using just one table, but with two, i've run into a snag.
My view uses a viewmodel now. I am not able to figure out how to pass the specific object id when Passing an id and TransactionViewModel Viewmodel into my Edit method Parameters.
Here is my old Edit and Edit post.
public ActionResult Edit(int id = 0)
{
Transactions transactions = _db.Transactions.Find(id);
if (transactions == null)
{
return HttpNotFound();
}
return View(transactions);
}
[HttpPost]
//[ValidateAntiForgeryToken]
public ActionResult Edit(TransactionViewModel viewModel)
{
var transactionType = viewModel.Transaction.TransactionType;
if (ModelState.IsValid)
{
//If the transaction category is an Expense, set it to a negative so we can calculate later.
if (transactionType == Classes.Constants.Expense || (transactionType == Classes.Constants.Payment && viewModel.Transaction.Amount < 0))
{
viewModel.Transaction.Amount *= -1;
}
var transaction = new Transactions()
{
ClientId = viewModel.Transaction.ClientId,
Amount = viewModel.Transaction.Amount,
Date = viewModel.Transaction.Date,
Category = viewModel.Transaction.Category,
Description = viewModel.Transaction.Description,
TransactionType = viewModel.Transaction.TransactionType
};
_db.Entry(transaction).State = EntityState.Modified;
_db.SaveChanges();
return RedirectToAction("Index");
}
return View(viewModel);
}
I've tried this for my get Edit, but it returns the same thing each time and not the one specified on my view. Ex. If click edit for Client D, it will pull up the edit screen for Client A and I cannot save it. I have an edit and delete button in my viewable table next to each transaction using an #Html.ActionLink().
public ActionResult Edit(TransactionViewModel viewModel)
{
if (ModelState.IsValid)
{
var transactions = from t in _db.Transactions
join c in _db.Clients
on t.ClientId equals c.ClientId
select new TransactionViewModel() { Clients = c, Transaction = t };
return View(transactions.FirstOrDefault());
}
return RedirectToAction("Index");
}
Any help would be appreciated. Thanks!

Answer 1

I bet that view is being cached. There are many different ways to influence caching in the controller. If you want to simply remove cacheing, in your case for editing, then decorate that action with the following:
[OutputCache(NoStore = true, Duration = 0)]
public ActionResult Edit(TransactionViewModel viewModel)
[OutputCache(NoStore = true, Duration = 0)]
public ActionResult Edit(int id = 0)
Note: You will have to clear cache to get the new view with the no cache set above.

Answer 2

Your Get Edit method should still accept an int ID to select the correct record form the database and it should return the view model.
something like this:
public ActionResult Edit(int id = 0)
{
var transactions = from t in _db.Transactions
join c in _db.Clients
on t.ClientId equals c.ClientId
where t.id == id
select new TransactionViewModel() { Clients = c, Transaction = t };
return View(transactions.FirstOrDefault());
}