Ensure map is present before trying to render it

Author: rsmithlal

app/views/better_together/shared/_mappable_map.html.erb

@@ -1,15 +1,17 @@
 
 <%# locals: (mappable:, map: mappable.map)%>
 
-<div class="map" id="<%= dom_id(mappable, :map) %>"
-    data-controller="better_together--map"
-    data-better_together--map-center-value="<%= map.center_for_leaflet %>"
-    data-better_together--map-spaces-value="<%= map.leaflet_points %>"
-    data-better_together--map-zoom-value="<%= map.zoom %>"
-    data-better_together--map-extent-value="<%= map.viewport %>">
-  <div class="map-controls">
-    <button class="btn btn-secondary" data-action="better_together--map#switchToOSM">OpenStreetMap</button>
-    <button class="btn btn-secondary" data-action="better_together--map#switchToSatellite">Satellite</button>
-    <button class="btn btn-secondary" data-action="better_together--map#enableGeolocation">Geolocate Me</button>
+<% if map %>
+  <div class="map" id="<%= dom_id(mappable, :map) %>"
+      data-controller="better_together--map"
+      data-better_together--map-center-value="<%= map.center_for_leaflet %>"
+      data-better_together--map-spaces-value="<%= map.leaflet_points %>"
+      data-better_together--map-zoom-value="<%= map.zoom %>"
+      data-better_together--map-extent-value="<%= map.viewport %>">
+    <div class="map-controls">
+      <button class="btn btn-secondary" data-action="better_together--map#switchToOSM">OpenStreetMap</button>
+      <button class="btn btn-secondary" data-action="better_together--map#switchToSatellite">Satellite</button>
+      <button class="btn btn-secondary" data-action="better_together--map#enableGeolocation">Geolocate Me</button>
+    </div>
   </div>
-</div>
+<% end %>