javascript - 如何使用MONK设置TTL使文档过期？

Question

我读了MongoDB documentation以便了解如何使用“生存时间”属性使文档过期。

医生说:

To expire data after a specified number of seconds has passed since the indexed field, create a TTL index on a field that holds values of BSON date type... For example, the following operation creates an index on the log_events collection’s createdAt field and specifies the expireAfterSeconds value of 3600 to set the expiration time to be one hour after the time specified by createdAt

db.log_events.createIndex( { "createdAt": 1 }, { expireAfterSeconds: 3600 } )

When adding documents to the log_events collection, set the createdAt field to the current time:

db.log_events.insert( {
   "createdAt": new Date(),
   "logEvent": 2,
   "logMessage": "Success!"
} )

如何使用 Node Monk 做到这一点？

Answer 1

应该是:

db.log_events.ensureIndex({ "createdAt": 1 }, { expireAfterSeconds: 3600 })

关于 ensureIndex 的文档

Ensures that indexes exist, if it does not it creates it