update model from custom directive VueJS

Question

I currently use Vue.JS 2.0 and I want to update the model off one Vue instance from an custom directive, but im looking a nice way to do it, this is because i trying to create a

Answer 1

Just to follow up on @Kamal Khan's answer (which works great).

I have just done the following and got it to work (below). This removes finding the object and relies on Vue's set functionality to set the value.

bind: function (el, binding, vnode) {
    $(el).datepicker({
        onSelect: function (date) {
             Vue.set(vnode.context, binding.expression, date);
         }
    });
},

My full directive is:

  Vue.directive("datepicker",{
    bind(el,binding, vnode) {
       console.log(binding);
       var self = el
      $(self).datepicker({
        dateFormat:'mm-dd-yy',
        onSelect: function (date) {
            Vue.set(vnode.context, binding.expression, date);
        }
    });      
    },
    updated: function (el,binding) {
    }
 });  

I can then call this in the template or html with:

with dtime being my data model value.

Hope this helps somebody else as this drove me nuts.