EmberModel_belongsTo_fix

var get = Ember.get;

Ember.Model.reopen({
  getBelongsTo: function(key, type, meta, store) {
    var idOrAttrs = get(this, '_data.' + key),
        record;

    if (Ember.isNone(idOrAttrs)) {
      return null;
    }

    if (meta.options.embedded) {
      var primaryKey = get(type, 'primaryKey'),
        id = idOrAttrs[primaryKey];
      record = type.create({ isLoaded: false, id: id, container: this.container });
      record.load(id, idOrAttrs);
    } else {
      if (store) {
        record = store.find(meta.type, idOrAttrs, false);
      } else {
        record = type.find(idOrAttrs);
      }
    }

    return record;
  }
});


Ember.Model.Store.reopen({
    find: function(type, id, isFetch) {
        
        var klass = this.modelFor(type),
            isFetch = isFetch === void 0 ? true : !!isFetch;
        klass.reopenClass({adapter: this.adapterFor(type)});
        if (!id) {
          return klass._findFetchAll(isFetch, this.container);
        } else if (Ember.isArray(id)) {
          return klass._findFetchMany(id, isFetch, this.container);
        }else if (typeof id === 'object') {
          return klass._findFetchQuery(id, isFetch, this.container);
        } else {
        return klass._findFetchById(id, isFetch, this.container);
    }
  }
})