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Correctly distinguish queries with limits and sorts

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This commit is contained in:
Slava Kim
2014-02-11 21:59:13 -08:00
committed by David Glasser
parent 818a770ed9
commit c389dadc46
1 changed files with 4 additions and 3 deletions
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7
packages/mongo-livedata/oplog_observe_driver.js
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@@ -20,7 +20,7 @@ OplogObserveDriver = function (options) {
self._mongoHandle = options.mongoHandle;
self._multiplexer = options.multiplexer;
if (options.ordered) {
if (options.cursorDescription.options.limit) {
// There are several properties ordered driver implements:
// - _limit is a positive number
// - _comparator is a function-comparator by which the query is ordered
@@ -28,7 +28,8 @@ OplogObserveDriver = function (options) {
// - _published implements maxElementId method in addition to IdMap methods
// XXX replace with doubly-heaps and shit once we get these working
var comparator = self._cursorDescription.sorter.getComparator();
var sorter = new Minimongo.Sorter(options.cursorDescription.options.sort);
var comparator = sorter.getComparator();
self._limit = self._cursorDescription.limit;
self._comparator = comparator;
self._unpublishedBuffer = new DummyStructure(comparator);
@@ -649,7 +650,7 @@ OplogObserveDriver.cursorSupported = function (cursorDescription, matcher) {
// This option (which are mostly used for sorted cursors) require us to figure
// out where a given document fits in an order to know if it's included or
// not, and we don't track that information when doing oplog tailing.
if (options.limit && (options.skip || !options.sorter)) return false;
if (options.limit && (options.skip || !options.sort)) return false;
// If a fields projection option is given check if it is supported by
// minimongo (some operators are not supported).