Node json-schema prevent null for interger

Question

I have schema,

'demand': {
    description: 'demand model',
    type: 'object',
    additionalProperties: false,
    properties: {
        '_id': {
            type: 'string'
        },
        'driversNeeded': {
            required: true,
            type: 'integer',
            minumum: 0
        },
        'date': {
            required: true,
            type: 'string',
            pattern: /^\d{4}-\d{2}-\d{2}$/
        }
    }
}

driversNeeded is supposed to be integer, with minimum value = 0;

But, then I validate payload {driversNeeded: null, date: '2015-11-11'} it treat it as valid.

I except null could be only accepted if I explicitly say ["integer", "null"] in type.

How can I prevent null to be accepted as integer?

Answer 1

That schema works for me, as it should (I get "Invalid type: null (expected integer)").

My best guess is that the issue might be in the larger document structure, meaning that the data isn't actually being tested against the schema you expect.