CODEWITHSUNDEEP
mongodbmeteor
dennismonsewicz
dennismonsewicz

Reputation: 25552

Date Range Mongo Query using Meteor Js

I have an attribute in my collection called dateacquired and the date is formatted like: 2014-03-28 06:08:00.

I am needing to pull back all documents in my collection that are less than or equal to a month ago from the current date. I am just not sure how to write this query.

Anyone know how to start one something like this?

Upvotes: 6

Views: 4844

Answers (2)

Elie Steinbock
Elie Steinbock

Reputation: 5108

My meteor method for how many people have signed up in the last nDays:

userCountPreviousDays: function (nDays) {
    check(nDays, Number);

    var arr = [];

    var now = new Date().getTime();
    var msInDay = 1000 * 60 * 60 * 24;

    for (var i = 0; i < nDays; i++) {
      arr[i] = Meteor.users.find({
        createdAt: {
          $lt: new Date(now - (msInDay * i)),
          $gt: new Date(now - (msInDay * (i+1)))
        }
      }).count();
    };

    return arr;
}

arr[i] is how many people signed up i days ago.

Upvotes: 2

Geoffrey Booth
Geoffrey Booth

Reputation: 7366

I assume those dates are stored as strings? You can compare strings with the mongoDB comparison operators $gt or $lt and they work as you’d expect. I’m going to also use Sugar to make my life easier (highly recommended; add via mrt add sugarjs) which gives me the Date.create and Date.format methods which reduce this into a one-liner:

  var cursorOfDocumentsSinceOneMonthAgo = yourCollection.find({
    dateacquired:
      { $gt: Date.create("1 month ago").format("{yyyy}-{MM}-{dd} {hh}:{mm}:{ss}")
      }
    });

Upvotes: 2

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