Hello !
Advertissement: I’m using CouchbaseLite Android 1.4.0 and I’m not ready to switch to 2.0.
To get the context of my issue:
- I have 2 doc types:
PATIENT&VISIT - A patient is linked to a visit by a field
visitId - A visit has a
startDateTimeand aendDateTime - A visit is considered as ‘open’ if the
endDateTimeis null or missing - A visit can be of different types through the field
visitType - A visit can be inactive through the field
inactive
I want to:
- Get all patients (id + name) of all open and active visits of a certain type
- The result is paginated using
skipandlimit - Get the result sorted by name
I managed to get all the correct patients and to paginate the result but the issue is with the sorting.
I can’t make a ‘post sorting’ (getting the result in a random order and then use self-made method to sort them) because of the pagination.
So here is how it works actually without the sorting:
THE MAP/REDUCE
if (isVisit()) {
Object inactive = document.get(FIELDS.INACTIVE);
if(inactive == null)
inactive = false;
Document patientDoc = database.getExistingDocument(FIELDS.PATIENT_ID);
if(patientDoc != null && patientDoc.getProperties() != null) {
Object[] keys = {
document.get(CouchbaseVisitManager.FIELDS.STOP_DATE_TIME),
inactive,
document.get(CouchbaseVisitManager.FIELDS.VISIT_TYPE)
};
Object[] values = {
document.get(FIELDS.PATIENT_ID),
patientDoc.get(FIELDS.FAMILY_NAME),
patientDoc.get(FIELDS.FIRST_NAME)
}
emitter.emit(keys, values);
}
}
THE QUERY
Query query = getQuery(Views.PATIENTS_CURRENTLY_IN_VISIT); //Helper method to create a query
query.setKeys(new ArrayList<Object>(){{
add(new ArrayList<Object>(){{
add(null);
add(false);
add(visitType);
}});
}});
query.setSkip(skip);
query.setLimit(limit);
And this is working well to get my patients but not for sorting them.
I tried to add patient names inside the view like this:
Object[] keys = {
patientDoc.getProperties().get(FIELDS.FAMILY_NAME),
patientDoc.getProperties().get(FIELDS.FIRST_NAME),
document.get(FIELDS.STOP_DATE_TIME),
inactive,
document.get(FIELDS.VISIT_TYPE)
};
And update my query.keys like this:
query.setStartKey(new ArrayList<Object>(){{
add(null);
add(null);
add(null);
add(false);
add(visitType);
}});
query.setEndKey(new ArrayList<Object>(){{
add(new HashMap<>());
add(new HashMap<>());
add(null);
add(false);
add(visitType);
}});
But this returns no patients (result.size = 0)
So… I don’t know how to achieve my goal.
I tought of a way to sort by values but it doesn’t seem to exist yet (should wait for 2.0 I think). But is their any workaround to achieve this kind of behavior?
Thank’s for reading.