public async Task <bool> Update(Processor.Model.System model)
{
var dto = model.ToDomainModel();
var original = await ReadDtoSystem(_db, model.Id);
var componentsToUnlink =
original.Component.Where(c => !dto.Component.Select(comp => comp.ComponentId).Contains(c.ComponentId));
var componentEntities = new List <EntityEntry <Component> >();
foreach (var component in componentsToUnlink)
{
component.SystemId = null;
component.System = null;
componentEntities.Add(_db.Component.Update(component));
}
var entity = _db.System.Update(dto);
await _db.SaveChangesAsync();
entity.State = EntityState.Detached;
foreach (var componentEntity in componentEntities)
{
componentEntity.State = EntityState.Detached;
}
return(true);
}
public async Task <int> Create(Processor.Model.System model)
{
var dto = model.ToDomainModel();
dto.Component = null;
var entity = _db.System.Add(dto);
await _db.SaveChangesAsync();
foreach (var modelComponent in model.Components)
{
var dtoComponent = modelComponent.ToDomainModel();
var exists = await _db.Component.AnyAsync();
dtoComponent.SystemId = entity.Entity.SystemId;
if (exists)
{
_db.Component.Update(dtoComponent);
}
else
{
await _db.Component.AddAsync(dtoComponent);
}
await _db.SaveChangesAsync();
}
entity.State = EntityState.Detached;
return(entity.Entity.SystemId);
}