javascript - How to run mongo --eval? - Stack Overflow

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I run mongo --help and it has an options for evaluate javascript.

mongo --eval  arg

However, I haven't found any example of how to use it. I try to run it but with no success. anyone know how to do it?

the reason is that, I want to delete a collection through mand line ( so that I can reuse the code and put it into shell script). I know I can write another nodejs and call the db to run it.. but instead of 20 lines of code, it would be nice if there is a solution with only few lines and be faster. :)

I run mongo --help and it has an options for evaluate javascript.

mongo --eval  arg

However, I haven't found any example of how to use it. I try to run it but with no success. anyone know how to do it?

the reason is that, I want to delete a collection through mand line ( so that I can reuse the code and put it into shell script). I know I can write another nodejs and call the db to run it.. but instead of 20 lines of code, it would be nice if there is a solution with only few lines and be faster. :)

• javascript
• mand-line
• mongodb
• evaluate

Share Improve this question Follow edited Dec 6, 2018 at 13:36 Cœur 38.8k2626 gold badges205205 silver badges277277 bronze badges asked Feb 3, 2011 at 18:20 murvinlaimurvinlai 50.4k5454 gold badges133133 silver badges177177 bronze badges

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Sorted by: Reset to default 9

That would be:

mongo <server>:<port>/<database> --eval "db.<some_collection>.drop();"

Or if you want to do something in more lines you can call a file (must end with .js):

mongo <server>:<port>/<database> some_instructions.js

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