let query = [];
if (!lodash.isEmpty(conditions)) {
	query.push({$match: conditions});
}
query.push(
	{$lookup: {
		from: 'projects',
		localField: '_id',
		foreignField: 'user',
		as: 'projects'
	}},
	{$sort: {internalCode: 1}}
);

db.User.aggregate(query)
	.allowDiskUse(true)
	.cursor({batchSize: 1000})
	.exec()
	.eachAsync((user) => {
		writer.addRow({
			'ID': user.internalCode,
			'Apellido': user.lastName,
			'Nombre/s': user.firstName,
			'Género': {female: 'Femenino', male: 'Masculino'}[user.gender],
			'Fecha de Nacimiento': user.birthdate,
			'DNI': user.dni,
			'Provincia': user.location.province,
			'Dirección': user.location.address + ' ' + user.location.number,
			'Piso/Departamento': (user.location.floor || '-') + ' / ' + (user.location.apartment || '-'),
			'Email': user.email,
			'Teléfono': user.phone,
			'Celular': user.mobile,
			'Proyecto': user.projects.length ? user.projects[0].name : '',
			'Deshabilitado': user.disabled ? 'SÍ' : 'NO'
		});
	}, {parallel: 1000})
	.then(() => {
		writer.finalize();
	})
	.catch(next);