rql get multiple documents from list of keys rethinkdb in javascript

Question

I have a table of \"person\" data, which has a unique key \"id\". I have a list of id\'s that I want to get the data for which I\'ll be sending as a JSON array from the cli

Answer 1

You can use .expr with .map for a cleaner alternative to .eqJoin

r.expr(array).map(function(id) {
  return r.table('user').get(id);
});

Answer 2

short answer:

r.expr([id1, id2, id3]).eqJoin(function(doc) { return doc; }, r.table("person"))

Longer answer:

There are a couple of ways to do this. The above is what I'd call the canonical way. Let's breakdown what's happening:

First with r.expr([id1, id2, id3]) we're packaging up the array to send it over to the server.

Then we call eqJoin what it does is take a stream of values and dispatch and indexed get for each one. The function(doc) { return doc; } is a slightly ugly hack because eqJoin requires a mapping function.

So in the end the above code becomes equivalent to:

[r.table("person").get(id1), r.table("person").get(id2), r.table("person).get(id3)]

Answer 3

Update for 2017. Use the ES6 spread operator '...'

r.db('vp').table('user').getAll(...["0", "0", "99"])

Answer 4

You can also use getAll with a dynamic array. You have to resort to apply

var ids = [1,2,3];
var table = r.table("person");
table.getAll.apply(table, ids).run( connection, callback);

Note that now since 1.12, you can just do

var ids = [1,2,3];
r.table("person").getAll(r.args(ids)).run(connection, callback)