X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/1bcfe8651af341c6e7cd01a19443c7c288efa932..2f3634990e8c2d9b374c99d7432a188f43175a35:/services/api/lib/record_filters.rb

diff --git a/services/api/lib/record_filters.rb b/services/api/lib/record_filters.rb
index c009bf537f..350c3802fc 100644
--- a/services/api/lib/record_filters.rb
+++ b/services/api/lib/record_filters.rb
@@ -77,7 +77,12 @@ module RecordFilters
                                     "boolean attribute '#{attr}'")
               end
             end
-            cond_out << "#{ar_table_name}.#{attr} #{operator} ?"
+            if operator == '<>'
+              # explicitly allow NULL
+              cond_out << "#{ar_table_name}.#{attr} #{operator} ? OR #{ar_table_name}.#{attr} IS NULL"
+            else
+              cond_out << "#{ar_table_name}.#{attr} #{operator} ?"
+            end
             if (# any operator that operates on value rather than
                 # representation:
                 operator.match(/[<=>]/) and (attr_type == :datetime))