lib/tasks/switchman.rake in switchman-1.14.5 vs lib/tasks/switchman.rake in switchman-1.14.6

@@ -18,11 +18,16 @@
         end
         servers = servers.split(',')
         open = servers.delete('open')
 
         servers = servers.map { |server| DatabaseServer.find(server) }.compact
-        servers.concat(DatabaseServer.all.select { |server| server.config[:open] }) if open
+        if open
+          open_servers = DatabaseServer.all.select { |server| server.config[:open] }
+          servers.concat(open_servers)
+          servers << DatabaseServer.find(nil) if open_servers.empty?
+          servers.uniq!
+        end
         servers = DatabaseServer.all - servers if negative
       end
 
       servers = filter_database_servers_chain.call(servers)
 
@@ -193,12 +198,10 @@
 
     def self.filter_database_servers_chain
       @filter_database_servers_chain ||= ->(servers) { servers }
     end
   end
-end
 
-module Switchman
   module ActiveRecord
     module PostgreSQLDatabaseTasks
       def structure_dump(filename, extra_flags=nil)
         set_psql_env
         args = ['-s', '-x', '-O', '-f', filename]