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Don't use oplog tailing for queries with unsupported fields projection

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Slava Kim
2013-12-03 15:27:47 -08:00
parent 52ff2df323
commit fb2886d88a
1 changed files with 5 additions and 0 deletions
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5
packages/mongo-livedata/oplog_observe_driver.js
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@@ -322,6 +322,11 @@ OplogObserveDriver.cursorSupported = function (cursorDescription) {
// not, and we don't track that information when doing oplog tailing.
if (options.limit || options.skip) return false;
// If a fields projection option is given check if it is supported by
// minimongo (some operators are not supported).
if (options.fields && !LocalCollection._supportedProjection(options.fields))
return false;
// For now, we're just dealing with equality queries: no $operators, regexps,
// or $and/$or/$where/etc clauses. We can expand the scope of what we're
// comfortable processing later. ($where will get pretty scary since it will