Mongoose query where value is not null

Looking to do the following query:

Entrant
    .find
      enterDate : oneMonthAgo
      confirmed : true
    .where('pincode.length > 0')
    .exec (err,entrants)->

Am I doing the where clause properly? I want to select documents where pincode is not null.

Solution 1:

You should be able to do this like (as you're using the query api):

Entrant.where("pincode").ne(null)

... which will result in a mongo query resembling:

entrants.find({ pincode: { $ne: null } })

A few links that might help:

• The mongoose query api
• The docs for mongo query operators

Solution 2:

$ne

selects the documents where the value of the field is not equal to the specified value. This includes documents that do not contain the field.

User.find({ "username": { "$ne": 'admin' } })

$nin

$nin selects the documents where: the field value is not in the specified array or the field does not exist.

User.find({ "groups": { "$nin": ['admin', 'user'] } })

Solution 3:

I ended up here and my issue was that I was querying for

{$not: {email: /@domain.com/}}

instead of

{email: {$not: /@domain.com/}}