在 MongoDB 中限制结果但仍然得到完整计数? [英] Limiting results in MongoDB but still getting the full count?

问题描述

为了速度，我想将查询限制为 10 个结果

For speed, I'd like to limit a query to 10 results

db.collection.find( ... ).limit(10)

但是，我也想知道总数，所以说有 124 个，但我只有 10 个".有没有好的有效的方法来做到这一点?

However, I'd also like to know the total count, so to say "there were 124 but I only have 10". Is there a good efficient way to do this?

推荐答案

默认情况下，count() 忽略 limit() 并计算整个查询中的结果.因此，例如，当您执行此操作时，var a = db.collection.find(...).limit(10);运行 a.count() 将为您提供查询的总数.

By default, count() ignores limit() and counts the results in the entire query. So when you for example do this, var a = db.collection.find(...).limit(10); running a.count() will give you the total count of your query.

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