boolean

A boolean is true or false. As a schema field it is written active: boolean, and the literals are true and false. Comparisons and the boolean operators (and, or, not) also produce booleans.

active = true
adult = age >= 18

route GET "/account/:id"
    account = db.accounts.find(params.id)
    require account.active else fail 403, "account is disabled"
    reply 200, account

Booleans are the clearest values to use in require and allow. Guards also use truthiness, so null and false stop the flow.

Notes

• A boolean has no methods. You combine booleans with and, or, and not (see Keywords).
• cache.get, db.<table>.find, and similar return null when absent, which is falsy, so you can guard them with require value else ... directly.