Pineapples like direct sun, I grow mine on a white rooftop in full sun here in the tropics. In fields they are not shaded at all. I'd say they can easily take full San Diego sun as long as they get sufficient water. Spray them like a brom so there is some water in the leaves and don't let them sit in soggy soil. They like humidity so the only thing that might be difficult for them up there is how dry it is, spraying them in the mornings should take care of that.
