Rails reset ALL Postgres sequences?

Question

The following works in the Rails 3 console to reset Postgres sequences:

ActiveRecord::Base.connection.reset_pk_sequence!(\'menucontrols\')
ActiveRecord::Base.con         


        

Answer 1

I found one way to do it from this posting: Reset PostgreSQL

I placed the following into seed.rb and ran rake db:seed

ActiveRecord::Base.connection.tables.each do |table|
  result = ActiveRecord::Base.connection.execute("SELECT id FROM #{table} ORDER BY id DESC LIMIT 1") rescue ( puts "Warning: not procesing table #{table}. Id is missing?" ; next )
  ai_val = result.any? ? result.first['id'].to_i + 1 : 1
  puts "Resetting auto increment ID for #{table} to #{ai_val}"
  ActiveRecord::Base.connection.execute("ALTER SEQUENCE #{table}_id_seq RESTART WITH #{ai_val}")
end

Answer 2

This is easier

ActiveRecord::Base.connection.tables.each do |t|
  ActiveRecord::Base.connection.reset_pk_sequence!(t)
end