[英]How do you use $count?
The mongodb documentation said to use db.collection.aggregate([{$count: "timers"}])
to count how many documents are in the collection "timers", but it says that $count
is invalid syntax. mongodb 文档说使用
db.collection.aggregate([{$count: "timers"}])
来计算集合“计时器”中有多少文档,但它说$count
是无效的语法。 Is there a way to fix?有没有办法解决?
Wrap in quotes "$count"
用引号括起来
"$count"
db.collection.aggregate([{ "$count" : "timers"}])
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