package datomic.samples;

import datomic.Database;

import static datomic.Peer.q;

import static datomic.Util.read;

import static datomic.samples.Fns.solo;

public class Schema {

public static final Object CARDINALITY_ONE = read(":db.cardinality/one");

public static final Object CARDINALITY_MANY = read(":db.cardinality/many");

public static Object cardinality(Object db, Object attr) {

return solo(solo(q("[:find ?v " +

":in $ ?attr " +

":where " +

"[?attr :db/cardinality ?card] " +

"[?card :db/ident ?v]]", db, attr)));

}

}