dump only the public schema when backing up the db

lib/export/exporter.rb

@@ -163,8 +163,7 @@ module Export
 
       [ password_argument,                  # pass the password to pg_dump
         "pg_dump",                          # the pg_dump command
-        "--exclude-schema=backup",          # exclude backup schema
-        "--exclude-schema=restore",         # exclude restore schema
+        "--schema=public",                  # only public schema
         "--file='#{@dump_filename}'",       # output to the dump.sql file
         "--no-owner",                       # do not output commands to set ownership of objects
         "--no-privileges",                  # prevent dumping of access privileges