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When running checkpoints.js script below 

$ mongo -u "admin" -p "xxx" monitor checkpoints.js

it doesn't look like variable 'i' can be used inside db statement ?

for (var i=1; i<8; i++) {
        print(i)
        print(db.checkpoints.find({day: i}).count())
}

Because it prints zeros for me

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  • 2
    And if you do db.checkpoints.find({day: 3}).count() it does return a result ? Commented Dec 15, 2015 at 13:38
  • only after I did i.toString(), sorry... Commented Dec 15, 2015 at 13:53
  • That's what I thought, I was just about to suggest .find({day: i.toString()}) but wasn't sure. Commented Dec 15, 2015 at 13:59

1 Answer 1

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The zero that is printing is the count of your query, not the variable i.

Update

I misunderstood your question, the variable can be used, just check that your query returns non-empty result by running it manually:

db.checkpoints.find({day: 1}).count()
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