Cache a record when using Query Params in the call? Ember-data

问题

I have got this route retrieving 2 models:

App.PanelRoute = Ember.Route.extend({
    model: function(){
    var topologymin = this.store.find('topologymin');
    var metricmap = this.store.find('metricmap', { param1: 'something'})
    return Ember.RSVP.hash({
        topologymin: topologymin,
        metricmap: metricmap
    });
 });

This makes 2 calls:

http://localhost/topologymins
http://localhost/metricmaps?param1=something

If I go to another route and again to this one, it makes again the call with the params, not the other one:

http://localhost/metricmaps?param1=something

But, as its the same call to retrieve the same records I would like them to be cached like in the other call.

How does it know when to call the server and when its not necessary? Is it possible to do that?

My models:

App.Topologymin = DS.Model.extend({
  siteGroup: DS.attr('string'),
  sites: DS.hasMany('site')
});

App.Metricmap = DS.Model.extend({
  profile: DS.attr('string'),
  link: DS.attr('string'),
  services: DS.attr()
});

回答1:

When you fire a request based on params Ember Data doesn't know how those params necessarily translate into the models (aka it doesn't know that you have all of the records that have some sort of relationship param1). You can cache it yourself, but then you'd still need some sort of way of knowing those records from other records in your store.

App.PanelRoute = Ember.Route.extend({
    model: function(){
      var met = this.get('fetchedBeforePromise'),
          topologymin = this.store.find('topologymin'),
          metricmap = met || this.store.find('metricmap', { param1: 'something'});

    this.set('fetchedBeforePromise', metricmap);

    return Ember.RSVP.hash({
        topologymin: topologymin,
        metricmap: metricmap
    });
 });

来源：https://stackoverflow.com/questions/23803388/cache-a-record-when-using-query-params-in-the-call-ember-data

标签

ember.js

ember-data