public async Task <int> UpdateManyAsync(IEnumerable <Category> categories)
{
if (categories == null)
{
return(0);
}
var updated = 0;
var comparer = new CategoryComparer();
foreach (var category in categories)
{
var original = await _categoryRepository.GetAsync(category.Id);
if (original == null || comparer.Equals(original, category))
{
continue;
}
await _categoryRepository.UpdateAsync(category);
updated++;
}
return(updated);
}
