MongoDB bash script

Question

I'm using Ubuntu 14.4 and MongoDB 2.6.6.

I'm writing a bash script and I'm using the following command:

mongo cc --eval "printjson(db.cc_data.count())"

to get the count of the collection cc_data. I would like to save the count returned in a variable, but I couldn't.

Juan Carlos Farah · Accepted Answer · 2015-03-02 18:56:57Z

5

You can assign the output of the shell to a variable. You just need to ensure you suppress the output from the mongo shell during the connection process using --quiet.

let count=`mongo cc --eval "printjson(db.cc_data.count());" --quiet`

You can test the value by running:

echo $count

answered Mar 2, 2015 at 18:56

Juan Carlos Farah

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Sede · Accepted Answer · 2015-03-02 19:11:21Z

2

In bash you can use the following syntax

var=$( mongo cc --eval "printjson(db.cc_data.count())" --quiet )

answered Mar 2, 2015 at 19:11

Sede

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