Add dashboard_count delay to Card

src/metabase/api/card.clj

@@ -60,7 +60,7 @@
   [id]
   (->404 (Card id)
          read-check
-         (hydrate :creator :can_read :can_write)))
+         (hydrate :creator :can_read :can_write :dashboard_count)))
 
 (defendpoint PUT "/:id"
   "Update a `Card`."

src/metabase/models/card.clj

@@ -33,10 +33,16 @@
    timestamped]
 
   (post-select [_ {:keys [creator_id] :as card}]
-    (map->CardInstance (assoc card :creator (delay (User creator_id)))))
+    (map->CardInstance (assoc card
+                              :creator         (delay (User creator_id))
+                              :dashboard_count (delay (-> (select metabase.models.dashboard-card/DashboardCard
+                                                                  (aggregate (count :*) :dashboards)
+                                                                  (where {:card_id (:id card)}))
+                                                          first
+                                                          :dashboards)))))
 
   (pre-cascade-delete [_ {:keys [id]}]
-    (cascade-delete 'metabase.models.dashboard-card/DashboardCard :card_id id)
-    (cascade-delete 'metabase.models.card-favorite/CardFavorite :card_id id)))
+    (cascade-delete 'DashboardCard :card_id id)
+    (cascade-delete 'CardFavorite :card_id id)))
 
 (extend-ICanReadWrite CardEntity :read :public-perms, :write :public-perms)

test/metabase/api/card_test.clj

@@ -77,6 +77,7 @@
          :can_read true
          :can_write true
          :organization_id nil
+         :dashboard_count 0
          :name card-name
          :creator_id (user->id :rasta)
          :creator (match-$ (fetch-user :rasta)