public async Task PersistWorkItemsAsync(IEnumerable <WorkItem> items)
{
var ids = items.Select(wi => wi.Id).ToArray();
var existingItems = await this.ListAsync(new WorkItemFilterForExistingItems(ids));
var comparer = new WorkItemComparer();
// updates
var updates = items.Intersect(existingItems, comparer);
this.DbContext.WorkItems.UpdateRange(updates);
// new items
var inserts = items.Except(existingItems, comparer);
this.DbContext.WorkItems.AddRange(inserts);
await this.DbContext.SaveChangesAsync();
}
public async Task PersistWorkItemsAsync(IEnumerable <WorkItem> items)
{
var ids = items.Select(wi => wi.Id).ToArray();
var existingItems = await _context.WorkItems
.Where(wi => ids.Contains(wi.Id))
.ToListAsync <WorkItem>();
var comparer = new WorkItemComparer();
// updates
var updates = items.Intersect(existingItems, comparer);
_context.WorkItems.UpdateRange(updates);
// new items
var inserts = items.Except(existingItems, comparer);
_context.WorkItems.AddRange(inserts);
await _context.SaveChangesAsync();
}