The `$min` update operator did not update certain non-existent array elements in 3.4 and 3.2, which is no longer the case in 3.6. The behavior under 3.6 seems to be the more correct one.
db.test.insert({"_id": "unique", "a": [],});
db.test.update({}, {"$min": {"a.1": {"x": 1}, "a.0": {"y": 1, }}});
// 3.6: { "_id" : "unique", "a" : [ { "y" : 1 }, { "x" : 1 } ] }
// 3.4 and prior: { "_id" : "unique", "a" : [ null, { "x" : 1 } ] }
- is related to
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SERVER-33687 Sort order of array indexes can determine success of an update
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- Closed
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- related to
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- Closed
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