diff options
Diffstat (limited to 'app/models/concerns/from_set_operator.rb')
-rw-r--r-- | app/models/concerns/from_set_operator.rb | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/app/models/concerns/from_set_operator.rb b/app/models/concerns/from_set_operator.rb index c6d63631c84..ce3a83e9fa1 100644 --- a/app/models/concerns/from_set_operator.rb +++ b/app/models/concerns/from_set_operator.rb @@ -11,7 +11,12 @@ module FromSetOperator raise "Trying to redefine method '#{method(method_name)}'" if methods.include?(method_name) define_method(method_name) do |members, remove_duplicates: true, remove_order: true, alias_as: table_name| - operator_sql = operator.new(members, remove_duplicates: remove_duplicates, remove_order: remove_order).to_sql + operator_sql = + if members.any? + operator.new(members, remove_duplicates: remove_duplicates, remove_order: remove_order).to_sql + else + where("1=0").to_sql + end from(Arel.sql("(#{operator_sql}) #{alias_as}")) end |