How to change model value in emberjs using jquery?

How can I change a model value in emberjs using jquery?

for example, if I have this:

App.LIENS=[
  {
          id: 1,
          apn: 'apn1',
          fips: '01700',
          state: 'CA',
          county: 'Los Angeles',
          address: 'somewhere st123',
          debt: 4000,
          isInPortfolio: false
  },
  {
          id: 2,
          apn: 'apn2',
          fips: '01744',
          state: 'FL',
          county: 'Miami',
          address: 'someplace st700',
          debt: 2000,
          isInPortfolio: true        
  },
  {
          id: 3,
          apn: 'apn3',
          fips: '05690',
          state: 'FL',
          county: 'Orlando',
          address: 'ExactPlace in st111',
          debt: 2500,
          isInPortfolio: false
  }
];

App.Liens = DS.Model.extend({
  id: DS.attr('number'),
  apn: DS.attr('string'),
  fips: DS.attr('string'),
  state: DS.attr('string'),
  county: DS.attr('string'),
  address: DS.attr('string'),
  debt: DS.attr('number'),
  inPortfolio: DS.attr('boolean')
});

How would I change the isInPortfolio value when a button is pressed using jquery?

This is my failed attempt:

$(document).ready(function(){
  var addLienButton=$('#addLien');
  addLienButton.click(function(){
    App.LIENS('isOnPortfolio',true);
  });
});

Im learning ember.js so if there is a better way of doing this please let me know (even though I would like to know how to achieve this using jquery also). Thanks in advance!