API Charts

API charts in the legacy agents were declared using express routes.

In the new agent, you will need to use either the agent.addChart or the collection.addChart function, depending on if the chart is to be displayed on a record of a collection or a dashboard.

Code cheatsheet

Legacy agent	New agent
router.post	agent.addChart collection.addChart(...)
Liana.StatSerializer	return resultBuilder.value(...) return resultBuilder.distribution(...)
request.query?.record_id	context.recordId

How to migrate

Migrating should be straightforward: the only differences are that:

• dashboard charts are now declared using the agent.addChart function.

• collection charts are now declared using the collection.addChart function, and access the record id using context.recordId instead of request.query?.record_id.

• Both types should use the resultBuilder helper to return the chart data.

Before

router.post('/stats/mrr', (req, res) => {
  // Load data
  const from = moment.utc('2018-03-01').unix();
  const to = moment.utc('2018-03-31').unix();
  const charges = await stripe.charges.list({ created: { gte: from, lte: to } });

  // Compute chart
  const mrr = charges.reduce((acc, charge) => acc + charge.amount, 0);
  const json = new Liana.StatSerializer({value: mrr}).perform();

  res.send(json);
});

After