public async Task <IReadOnlyList <T> > Handle(ListEntitiesQuery <T> request, CancellationToken cancellationToken)
{
return(await _context.Set <T>()
.OrderBy(x => x.CreationDate)
.Skip(Math.Max(request.Skip, 0))
.Take(Math.Max(Math.Min(request.Take, 100), 1))
.ToListAsync(cancellationToken));
}
public async Task <T> Handle(DeleteEntityCommand <T> request, CancellationToken cancellationToken)
{
var entity = await _context.Set <T>().SingleOrDefaultAsync(x => x.Id == request.EntityId, cancellationToken);
if (entity is null)
{
return(null);
}
_context.Attach(entity);
_context.Entry(entity).State = EntityState.Deleted;
await _context.SaveChangesAsync(cancellationToken);
return(entity);
}
public async Task <T> Handle(UpdateEntityCommand <T> request, CancellationToken cancellationToken)
{
var exists = await _context.Set <T>().AnyAsync(x => x.Id == request.EntityId, cancellationToken);
if (!exists)
{
return(null);
}
var entity = request.Entity;
entity.Id = request.EntityId;
_context.Attach(entity);
_context.Entry(entity).State = EntityState.Modified;
await _context.SaveChangesAsync(cancellationToken);
return(entity);
}
public async Task <T> Handle(ReadEntityQuery <T> request, CancellationToken cancellationToken)
{
return(await _context.Set <T>()
.SingleOrDefaultAsync(x => x.Id == request.EntityId, cancellationToken));
}