Hello, I am developing an application for the purchase and sale of products, but I would like to find a way to add more than one product when buying and selling, currently I can only make one sale and one purchase per form. I would like to sell more ...

Hello I am making a meeting room reservation app, but my question is how to make it so that another user cannot reserve the meeting room when it is already reserved, any idea.

Hola Una consulta quiero saber por que me pasa esto y si hay una solución , estoy investigando pero no encuentro información precisa para resolver este problema. Ayuda.