.mergeMap(payload =>
Observable.create(sink => {
onNext(payload, () => {
sink.next(); // pass void to public observer's `next`
sink.complete();
});
}),
_loadMore = (
pageSize: number,
observerOrCallback: ?ObserverOrCallback,
options: ?RefetchOptions,
): ?Disposable => {
if (!this._canFetchPage('loadMore')) {
return {
dispose() {},
};
}
const observer = toObserver(observerOrCallback);
const connectionData = this._getConnectionData();
if (!connectionData) {
Observable.create(sink => sink.complete()).subscribe(observer);
return null;
}
const totalCount = connectionData.edgeCount + pageSize;
if (options && options.force) {
return this._refetchConnection(totalCount, observerOrCallback);
}
const {END_CURSOR, START_CURSOR} = ConnectionInterface.get();
const cursor = connectionData.cursor;
warning(
cursor,
'ReactRelayPaginationContainer: Cannot `loadMore` without valid `%s` (got `%s`)',
direction === FORWARD ? END_CURSOR : START_CURSOR,
cursor,
);
const paginatingVariables = {
count: pageSize,
cursor: cursor,
totalCount,
};
this._hasPaginated = true;
const fetch = this._fetchPage(paginatingVariables, observer, options);
return {dispose: fetch.unsubscribe};
};
