Retrieving composite resources via search

[rkodev]

The search API is designed to only return results of a single resource type, i.e the search can only return a list of Patients or a list of Tasks but not both at the same.

Currently, for the Patient register in the Covax app, we need to use both the Patient and Task resources to display the patient list. One of the ways to do this in the app would be

a) Strategy 1: Execute 2 queries before displaying results on the screen

• Fetch all tasks that indicate the list of patients to be listed
• Extract patient ids from the tasks
• Fetch all Patient resources by the given ids

b) Strategy 2 Lazy loading data in the Patient Register

• Execute a single patient search query
• Execute multiple background queries to list tasks status displayed on the view holder

We can also have a discussion on whether the SDK will be able to search and return composite Resources in the same query

** Edited to replace the word status with tasks

[fredhersch]

@rkodev Would another way to approach this be to:

1. Get a list of all the patients in the patient register (how is this defined)
2. For each patient, generate a second search query to return all tasks associated with that patient

[vincent-karuri]

@rkodev this discussion may be of interest #81