Render page flow:
- Search website.page in _serve_page for requested URL
- Check if the page is visible with `is_visible`
- `is_visible` will get the `ir.ui.view` of the page
Note that this is not 'cachable' as being visible depends of now() for the
publishing date
- Render layout which is getting the website menus
Note that this can't be cached either as a menu visibility might also
depends of it's website.page visibility which depends of now()
- Checking menus `is_visible` fetch the menus pages and those pages views.
Before this commit, every level of menu hierarchy would add 2 queries.
This can be avoided by prefetching everything in once during the dispatch if we
know we will render the website menu.
In such a case, read `is_visible` on every website menus will fetch every
pages, views and menus in the lowest SQL queries possible, eg one query for
every table.
For a 3 level menus, requests goes from 20 to 12 to load a untracked page.
task-2211013
Romain Derie
a5a57321c7