StartAfter does not take into consideration documents with similar values (Skips some documents)

[victorkingi]

StartAfter does not take into consideration documents with similar values (Skips some documents)

[benomatis]

@victorkingi in your example doc 2 is skipped because you defined startAfter with a value of testVal of 1, thus it will skip (start the query after) the docs that contain that value for that field.

Note that startAfter either takes a value of the field you use in orderBy, or a DocumentSnapshot (see https://googleapis.dev/nodejs/firestore/latest/Query.html#startAfter).

Here in redux-firebase you can use the getSnapshotByObject method to generate such snapshot object. This is described here:

redux-firestore/src/utils/query.js

Lines 17 to 26 in b65e7a2

	* Get DocumentSnapshot and QuerySnapshot with object from either data or
	* ordered firestore state. If provided with doc data, it will return
	* DocumentSnapshot, providing with a collection from data or an array from
	* ordered state will return QuerySnapshot, except ordered state that generated
	* as DocumentRef will return DocumentSnapshot
	* Note: the cache is local and, not persistance. Passing an object from initial
	* state or from SSR state will yield undefined.
	* @param {object|Array} obj - The object from data or ordered state
	* @returns {firebase.firestore.DocumentSnapshot|firebase.firestore.QuerySnapshot}
	* DocumentSnapshot or QuerySnapshot depend on type of object provided