protected virtual async Task <bool> SingleDeleteCommand(SingleQuery <TEntity> entityQuery, CancellationToken cancellationToken = default(CancellationToken))
{
var command = new EntityDeleteQuery <TEntity, TReadModel>(entityQuery, User);
var result = await Mediator.Send(command, cancellationToken).ConfigureAwait(false);
return(result);
}
protected override async Task <bool> ProcessAsync(EntityDeleteQuery <TEntity, TReadModel> message, CancellationToken cancellationToken)
{
var entityQuery = message.Query;
var dbSet = _context.Set <TEntity>();
// build query from filter
var query = entityQuery.Query.Filter(dbSet);
if (!string.IsNullOrEmpty(entityQuery.Query.IncludeProperties))
{
foreach (var includeProperty in entityQuery.Query.IncludeProperties.Split
(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
{
query = query.Include(includeProperty);
}
}
// get total for query
var total = await query
.CountAsync(cancellationToken)
.ConfigureAwait(false);
// short circuit if total is zero
if (total == 0)
{
throw new Exception("Unable to find records.,");
}
// page the query and convert to read model
var result = await query
.FirstOrDefaultAsync(cancellationToken)
.ConfigureAwait(false);
dbSet.Remove(result);
var output = await _context
.SaveChangesAsync(cancellationToken)
.ConfigureAwait(false);
return(output == 1 ? true:false);
}
