private async Task SeedVisualizationsAsync(CancellationToken cancellationToken)
{
var visualizations = new Visualization[]
{
new Visualization()
{
Name = "Visualization 1", CustomerId = Customers.First().Key
},
new Visualization()
{
Name = "Visualization 2", CustomerId = Customers.Last().Key
}
};
_context.Visualizations.AddRange(visualizations);
await _context.SaveChangesAsync(cancellationToken);
}
public async Task <Unit> Handle(CreateCustomerCommand request, CancellationToken cancellationToken)
{
var entity = new Customer
{
CustomerId = request.Id,
Name = request.Name,
};
_context.Customers.Add(entity);
await _context.SaveChangesAsync(cancellationToken);
await _mediator.Publish(new CustomerCreated { CustomerId = entity.CustomerId }, cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(UpdateCustomerCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Customers
.SingleOrDefaultAsync(c => c.CustomerId == request.Id, cancellationToken);
if (entity == null)
{
throw new NotFoundException(nameof(Customer), request.Id);
}
entity.Name = request.Name;
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(DeleteCustomerCommand request, CancellationToken cancellationToken)
{
var entity = await _context.Customers
.FindAsync(request.Id);
if (entity == null)
{
throw new NotFoundException(nameof(Customer), request.Id);
}
var hasVisualizations = _context.Visualizations.Any(o => o.CustomerId == entity.CustomerId);
if (hasVisualizations)
{
throw new DeleteFailureException(nameof(Customer), request.Id, "There are existing visualizations associated with this customer.");
}
_context.Customers.Remove(entity);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}