how to add more bar codes for mobile shop

[AdnanRaj]

check we can't search item with bar code because we using default bar codes so we can't check in stock also when we add items in lote that items show in stock so if single item we have in more quantity so how we add stock quantity becasue there lote items also showing in stock
also its not giving error item out of stock
for example if 1 product not available its must be show error item out of stock etc
thank you