I would need you to guide me, I am setting up a project and I have a window where I should select a pdf file and save it in the database (postgresql). The file should convert it into an array chain and save it, then perform the opposite step to see it. Search everywhere but the only thing they show me is how to save an image, try to do it alone but it has not come out. If someone has how to do it, I thank them. Greetings