empty card identification in pulse.render more robust

frontend/src/metabase/pulse/components/PulseEditChannels.jsx

@@ -38,7 +38,8 @@ export default class PulseEditChannels extends Component {
         user: PropTypes.object.isRequired,
         userList: PropTypes.array.isRequired,
         setPulse: PropTypes.func.isRequired,
-        testPulse: PropTypes.func.isRequired
+        testPulse: PropTypes.func.isRequired,
+        cardPreviews: PropTypes.array
     };
     static defaultProps = {};
 
@@ -135,7 +136,6 @@ export default class PulseEditChannels extends Component {
     }
 
     willPulseSkip() {
-        console.log(this);
         let cards = _.pluck(this.props.pulse.cards, 'id');
         let cardPreviews = this.props.cardPreviews;
         let previews = _.map(cards, function (id) { return _.find(cardPreviews, function(card){ return (id == card.id);})});

src/metabase/pulse/render.clj

@@ -390,7 +390,11 @@
     (cond
       (or (= aggregation :rows)
           (contains? #{:pin_map :state :country} (:display card))) nil
-      (zero? row-count)                                            :empty
+      (or (zero? (-> card :rows count))
+          (= [[nil]]
+             (-> card :rows))
+          (= [[0]]
+             (-> card :rows)))                                     :empty
       (and (= col-count 1)
            (= row-count 1))                                        :scalar
       (and (= col-count 2)