'random' tag in 'order by' clause to request SQLite to random select data rows from result set
"random 3 pop" {
genre is "Pop" and
media_kind is music
order by random desc
limit 3
}
For dates that require context (ie today, yesterday, N days ago etc) we want the
underlying SQL to respect the current time when running query; a query that
requests items for 'today' should only find matches for the time it was run.
Current implementation would generated a fixed date (at the time the SMARTPL is
inserted into db) in the playlist table where as this commit understands the
context of the date.
avoid having magic numbers like "media_kind = 1" in smartplaylists. Enum
rules are defined like "media_kind is music" with a fixed set of valid
values after the "is" keyword.
