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t = db.null2;
t.drop();
t.insert({_id: 1, a: [{b: 5}]});
t.insert({_id: 2, a: [{}]});
t.insert({_id: 3, a: []});
t.insert({_id: 4, a: [{}, {b: 5}]});
t.insert({_id: 5, a: [5, {b: 5}]});
function doQuery(query) {
printjson(query);
t.find(query).forEach(function(z) {
print("\t" + tojson(z));
});
return t.find(query).count();
}
function getIds(query) {
var ids = [];
t.find(query).forEach(function(z) {
ids.push(z._id);
});
return ids;
}
theQueries = [{"a.b": null}, {"a.b": {$in: [null]}}];
for (var i = 0; i < theQueries.length; i++) {
assert.eq(2, doQuery(theQueries[i]));
assert.eq([2, 4], getIds(theQueries[i]));
}
t.ensureIndex({"a.b": 1});
for (var i = 0; i < theQueries.length; i++) {
assert.eq(2, doQuery(theQueries[i]));
assert.eq([2, 4], getIds(theQueries[i]));
}
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