Relation is DS.PromiseMany instead model and data

What I need is: 1) Represent list of partners

App.Partner= DS.Model.extend(
    {
        name: attr(),
        site: attr(),
        contacts: DS.hasMany('partner-contact', { async: true, polymorphic: true })
    }
);

2) and names of partners contacts

App.PartnerContact = DS.Model.extend(
    {
        name: attr(),
        phone: attr(),
        post: attr(),
        email: attr(),
        partnerId: attr(),
        partner: DS.belongsTo('partner')
    }
);

So I have route:

App.CallsMyContactsRoute = Ember.Route.extend({
    //needs: "partner-contacts",
    model: function () {
        return this.store.find('partner');  
    }
});

And template:

{{#each partner in model}}
        <tr class="gradeA even" role="row">
            <td class="sorting_1">{{partner.name}}</td>
            <td>{{partner.name}}</td>
            <td>{{partner.phone}}</td>
            <td class="center">

                {{partner.contacts}}
            {{#each contact in partner.contacts}}
                {{contact.name}}
            {{/each}}
            </td>
            <td class="center">A</td>
        </tr>
    {{/each}}

But {{partner.contacts}} is DS.PromiseManyArray And its ever dont make a query to server.

What is the problem?