Reconciler can't normalize data

queries.cljs

(defui RootView
	static om/IQuery
	(query [this]
		   (let [map-props (om/get-query map-component/MapView)]
			   `[{:map-props ~map-props}])))

(defui MapView
	static om/IQuery
	(query [this]
		   (let [cluster-query (om/get-query ClusterView)]
			   `[{:clusters ~cluster-query}])))

(defui ClusterView
  static om/Ident
  (ident [this {:keys [id]}]
         [:cluster/by-id id])
  static om/IQuery
  (query [this]
         (let [parking-spot-query (om/get-query ParkingSpotView)]
           `[:id {:parking-spots ~parking-spot-query}]))))

(defui ParkingSpotView
  static om/Ident
  (ident [this {:keys [id]}]
         [:parking-spot/by-id id])
  static om/IQuery
  (query [this]
         [:id :latitude :longitude])))


;; the initial data:

(def init-data
  {:parking-spots [{:id "parkingspot1" :latitude 49.5337868906 :longitude 10.9932439499}
                   {:id "parkingspot2" :latitude 50.0322684609 :longitude 11.472756837}
                   {:id "parkingspot3" :latitude 49.7504798885 :longitude 11.0595198813}
                   {:id "parkingspot4" :latitude 50.0487723441 :longitude 10.059378956}]
   :clusters [{:id 0 :parking-spots [{:id "parkingspot4"} {:id "parkingspot3"}]}
              {:id 1 :parking-spots [{:id "parkingspot2"} {:id "parkingspot1"}]}]})

The root query is:

[{:map-props [{:clusters [:id {:parking-spots [:id :latitude :longitude]}]}]}]

The problem is that the reconciler doesn't seem to normalize the data, even though there are proper Idents in place and the shape of the data seems ok.