public async Task <RssRecord> AddAsync(RssRecord record, CancellationToken cancellationToken)
{
if (record == null)
{
throw new ArgumentNullException(nameof(record));
}
if (record.Id > 0)
{
throw new ArgumentOutOfRangeException(nameof(record));
}
using (var context = _contextFactory())
{
await context.RssRecords.AddAsync(record, cancellationToken);
await context.SaveChangesAsync(cancellationToken);
return(record);
}
}
public async Task UpdateAsync(
RssRecord record, IReadOnlyList <string> propertyNames, CancellationToken cancellationToken)
{
if (record == null)
{
throw new ArgumentNullException(nameof(record));
}
if (record.Id < 1)
{
throw new ArgumentOutOfRangeException(nameof(record));
}
if (propertyNames == null)
{
throw new ArgumentNullException(nameof(propertyNames));
}
if (propertyNames.Count == 0)
{
throw new ArgumentOutOfRangeException(nameof(propertyNames));
}
using (var context = _contextFactory())
{
var entity = context.RssRecords.Attach(record);
foreach (var propertyName in propertyNames)
{
var property = entity.Property(propertyName);
if (property == null)
{
throw new InvalidOperationException();
}
property.IsModified = true;
}
await context.SaveChangesAsync(cancellationToken);
}
}
