public virtual async Task SaveAsync(IntranetDbContext context = null)
{
bool isExternalContext = context != null;
context = context ?? DbContextAsync;
try
{
await context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
// for cases when we trying to update entities which does not present in database.
var entries = context.ChangeTracker.Entries()
.Where(i => i.State == EntityState.Modified);
foreach (var entry in entries)
{
var dbValues = await entry.GetDatabaseValuesAsync();
if (dbValues == null)
{
entry.State = EntityState.Added;
}
}
await context.SaveChangesAsync();
}
finally
{
if (!isExternalContext)
{
context.Dispose();
}
}
}
