Allow for nil smart column with hash format

app/views/blazer/queries/run.html.erb

@@ -141,10 +141,10 @@
                         <% else %>
                           <%= blazer_format_value(k, v) %>
                         <% end %>
+                      <% end %>
 
-                        <% if v2 = (@boom[k] || {})[v.to_s] %>
-                          <div class="text-muted"><%= v2 %></div>
-                        <% end %>
+                      <% if v2 = (@boom[k] || {})[v.nil? ? v : v.to_s] %>
+                        <div class="text-muted"><%= v2 %></div>
                       <% end %>
                     </td>
                   <% end %>

lib/blazer/result.rb

@@ -25,13 +25,16 @@ module Blazer
         columns.each_with_index do |key, i|
           query = data_source.smart_columns[key]
           if query
-            if query.is_a?(Hash)
-              boom[key] = query.stringify_keys
-            else
-              values = rows.map { |r| r[i] }.compact.uniq
-              result = data_source.run_statement(ActiveRecord::Base.send(:sanitize_sql_array, [query.sub("{value}", "(?)"), values]))
-              boom[key] = Hash[result.rows.map { |k, v| [k.to_s, v] }]
-            end
+            res =
+              if query.is_a?(Hash)
+                query
+              else
+                values = rows.map { |r| r[i] }.compact.uniq
+                result = data_source.run_statement(ActiveRecord::Base.send(:sanitize_sql_array, [query.sub("{value}", "(?)"), values]))
+                result.rows
+              end
+
+            boom[key] = Hash[res.map { |k, v| [k.nil? ? k : k.to_s, v] }]
           end
         end
         boom