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| By Source, https://en.wikipedia.org/w/index.php?curid=48498452 |
As we are working on different projects, it may happen that we require the two different mongodb versions to run on same machine or you may get following type of error which I get today only:
name: ‘MongoError’,
message: ‘The ‘cursor’ option is required, except for aggregate with the explain argument’,
operationTime: Timestamp { _bsontype: ‘Timestamp’, low_: 24, high_: 1527143887 },
ok: 0,
errmsg: ‘The ‘cursor’ option is required, except for aggregate with the explain argument’,
code: 9,
codeName: ‘FailedToParse’,
‘$clusterTime’:
{ clusterTime: Timestamp { _bsontype: ‘Timestamp’, low_: 24, high_: 1527143887 },
signature: { hash: [Object], keyId: [Object] } } }
(node:65062) UnhandledPromiseRejectionWarning: MongoError: The ‘cursor’ option is required, except for aggregate with the explain argument
at Function.MongoError.create (/var/www/html/node_modules/mongodb-core/lib/error.js:31:11)
After trying to do some google, I go to know that after MongoDB upgrade this issue has occurred, so I need to downgrade the current MongoDB versions.
My Current MongoDB version is 3.6.X and I need to downgrade it to 3.4.X, so I have done following commands to do this.
As I use brew to install MongoDB I have followed following commands to downgrade the MongoDB.
$ brew update
$ brew install mongodb@3.4
Now it will install it on our machine but we need to force brew to use MongoDB 3.4 version instead of MongoDB 3.6 so we need to run following commands.
$ brew unlink mongodb
$ brew link –force mongodb@3.4 (–force required because it is a keg, which is it’s a binary.)
Now when you are done with that project and need to again revert mongodb to latest version then you can use following commands to return back to original
$brew unlink mongodb@3.2
$brew link mongodb
Please let me know if you have any issues or queries regarding it.
Thanks.