this.ref.orderBy is not a function in index.esm.js

[KnightRag]

Hi,

I'm currently getting the following error:

ERROR TypeError: this.ref.orderBy is not a function
    queryPoint index.esm.js:1502
    queries index.esm.js:1460
    within index.esm.js:1459
    getNearbyDiscounts distance.service.ts:91

This occurs only when we pass a reference in the query method of the geo client:

const discountsRef = this.angularFirestore.collection('discounts');

this.geoClient.query("discounts").within(this.centerPoint, radius, Constants.dctPoint); // Works like this. But won't if passing discountRef => this.ref.orderBy is not a function

I thought in the beginning it occurred because the query Ref I was passing to geoClient.query() had already orderBy set, but the error still occurs after removing it.

I need to pass a ref because I have dynamic compound queries to be added on the ref.

I tried to understand the error but it feels there's an issue with the code itself at the following line.

GeoFireQuery.prototype.queryPoint = function (geohash, field) {
        var end = geohash + '~';
        return this.ref
            .orderBy(field + ".geohash")
            .startAt(geohash)
            .endAt(end);
    };

Can anyone help me or advise me for a workaround please?
Thanks