// @tags: [requires_non_retryable_writes, requires_fastcount] t = db.update_arraymatch5; t.drop(); t.insert({abc: {visible: true}, testarray: [{foobar_id: 316, visible: true, xxx: 1}]}); t.ensureIndex({'abc.visible': 1, 'testarray.visible': 1, 'testarray.xxx': 1}); assert(t.findOne({'abc.visible': true, testarray: {'$elemMatch': {visible: true, xxx: 1}}}), "A1"); assert(t.findOne({testarray: {'$elemMatch': {visible: true, xxx: 1}}}), "A2"); t.update({'testarray.foobar_id': 316}, {'$set': {'testarray.$.visible': true, 'testarray.$.xxx': 2}}, false, true); assert(t.findOne(), "B1"); assert(t.findOne({testarray: {'$elemMatch': {visible: true, xxx: 2}}}), "B2"); assert(t.findOne({'abc.visible': true, testarray: {'$elemMatch': {visible: true, xxx: 2}}}), "B3"); assert.eq(1, t.find().count(), "B4");