/// <summary>
/// Updates an existing shopping list
/// </summary>
/// <param name="value"></param>
public void Update(ShoppingList value)
{
using (var scope = new TransactionScope())
{
var existingList = _dataContext.Lists.FirstOrDefault(list => list.Id == value.Id);
if (existingList == null)
{
throw new ArgumentException("Provided value does not exist in the database and cannot be updated.");
}
existingList.Name = value.Name;
_dataContext.SaveChanges();
scope.Complete();
}
}
/// <summary>
/// Creates a new shopping list
/// </summary>
/// <param name="shoppingList"></param>
/// <returns></returns>
public void Create(ShoppingList shoppingList, string ownerId)
{
using (var scope = new TransactionScope())
{
// Assign the provided owner to the shopping list.
if (shoppingList.Users == null)
{
shoppingList.Users = new Collection <ApplicationUser>();
}
shoppingList.Users.Add(_dataContext.Users.FirstOrDefault(usr => usr.Id == ownerId));
// Store the shopping list as part of this method
_dataContext.Lists.Add(shoppingList);
_dataContext.SaveChanges();
scope.Complete();
}
}