Recently, when migrating a large Rails application to Rails 4.0 that used PostGis,

I kept getting warnings like:

unknown OID: geography(1838124)

Thanks to

http://gray.fm/2013/09/17/unknown-oid-with-rails-and-postgresql/

I just added a file config/initializers/postgres_oids.rb with content:

``Recently, when migrating a large Rails application to Rails 4.0 that used PostGis,

I kept getting warnings like:

unknown OID: geography(1838124)

Thanks to

http://gray.fm/2013/09/17/unknown-oid-with-rails-and-postgresql/

I just added a file config/initializers/postgres_oids.rb with content:

``