this approach should be faster
Cliente's `tiposIds` and `attributes` are now defined on ClienteOnFormMixin. If you want the mixing to look for clientes on identification's change, look for `queryForClienteOnIdentificacionChange` property
we assume cliente is a relationship. so we set it to the model
showing errors_messages
ModelBackedView#failureCallback now accepts an errorMessage
added Venta::VentaInfo

methods not defined yet
removing fields from Venta
annotate and including modules
these fields doesn't exist anymore
I forgot to remove `renta_retenido`
these fields doesn't exist anymore
added plural for *venta*
inflecting singular for venta
VentasNewView now saves cliente and then saves venta
added VentaSerializer to serialise relationships
supporting /ventas/:venta_id (not done yet)
doing Api::VentasController