FHIR: date filter in smart on fhir search api

Question

I'm new to Smart on FHIR and Creating one demo application for training purpose using fhirclient.js. I need to get some specific vital information of patient like Temp, Weight and so for specified period of date (last 3 months).

smart.patient.api.search({
                    type: "Observation",            
                    query: {          
                      $sort: [
                          ["date",
                          "asc"]
                    ],
                    code: {
                      $or: ['http://loinc.org|8462-4',
                        'http://loinc.org|8480-6',
                        'http://loinc.org|55284-4',
                        'http://loinc.org|8310-5',
                        'http://loinc.org|3141-9',
                        'http://loinc.org|718-7']
                    }
                  }
                  }).then(results => {

Let me know how to include date filter in this search api?

score 0 · Accepted Answer · answered Oct 01 '19 at 20:06

This is just a mongo-like syntax sugar provided by fhir.js. It acts as an URL builder and the result FHIR URL might look like:

Latest versions of fhirclient does not come with fhir.js included. Nowadays we have things like URLSearchParams to help us achieve similar results. Using an up to date version of the fhirclient library, the code you are looking for could look like this:

const client = new FHIR.client("https://r3.smarthealthit.org");
const query = new URLSearchParams();
query.set("_sort", "date");
query.set("code", [
  'http://loinc.org|8462-4',
  'http://loinc.org|8480-6',
  'http://loinc.org|55284-4',
  'http://loinc.org|8310-5',
  'http://loinc.org|3141-9',
  'http://loinc.org|718-7'
].join(","));
query.set("date", "ge2013-03-14"); // after or equal to 2013-03-14
query.set("date", "le2019-03-14"); // before or equal to 2019-03-14
client.request("Observation?" + query).then(...)

Also see http://hl7.org/fhir/search.html#date for details about the date parameter syntax.

Thanks.. Resolved my problem. I'm just followed your hint and added date filter in the RestApi like below date: { $and: ['ge2014-10-03', 'le2019-03-14'] } — kavitha K, Oct 03 '19 at 05:52

FHIR: date filter in smart on fhir search api

1 Answers1