public async Task <IActionResult> PatchAsync(int id, Delta <T> value, CancellationToken cancellationToken)
{
var current = await _records.SingleOrDefaultAsync(r => r.Id == id, cancellationToken);
if (current == null)
{
return(NotFound());
}
value.ApplyPatch(current);
TryValidateModel(current);
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
await _context.SaveChangesAsync(cancellationToken);
return(Ok(current));
}