Dexie DB:如何将数组保存到数据库?

var db = new Dexie("testdb");
db.version(1).stores({friends: 'id,name,age'});
db.friends.bulkPut([
    {id: 1, name: "Foo", age: 33},
    {id: 2, name: "Bar", age: 34}
]).then(result => {
    alert ("Successfully stored the array");
}).catch(error => {
    alert ("Error: " + error);
});