Handle aggregation of categories and datetimes properly

src/metabase/automagic_dashboards/core.clj

@@ -539,7 +539,7 @@
                             (remove (comp #{root} :table))
                             (take (- max-related (count indepth))))
               :indepth indepth})))
-     (log/info (format "Skipping %s: no cards fully match the topology."
+     (log/info (format "Skipping %s: no cards fully match bound dimensions."
                        (full-name root))))))
 
 (def ^:private ^{:arglists '([card])} table-like?
@@ -574,10 +574,13 @@
   [field]
   (-> "special/field.yaml"
       rules/load-rule
-      (update :dimensions conj {"Field"
-                                {:field_type  [((some-fn :special_type
-                                                         :base_type) field)]
-                                 :named       (:name field)
-                                 :score       100
-                                 :aggregation "default"}})
+      (update :dimensions conj
+              {"Field"
+               {:field_type  [(-> field table :entity_type)
+                              ((some-fn :special_type :base_type) field)]
+                :named       (:name field)
+                :score       100
+                :aggregation (cond
+                               (isa? (:base_type field) :type/DateTime) :month
+                               (isa? (:base_type field) :type/Number)   :default)}})
       (automagic-dashboard field)))