PG :: UndefinedFile at / ERROR：无法打开文件

Question

I am getting the following error on a particular id , when I try to do TestModel.find_each everytime. Even though I am able to access that object by find . and on deleting that particular object, this same error with the same oid(16385) and index(19388) is occurring for the just next id. Why is this happening?

PG::UndefinedFile at / ERROR: could not open file "base/16385/19338.2" (target block 268441506): No such file or directory

Answer 1

This is unrelated to rails , it's a postgres message indicating that a datafile is missing.

16385 is the identifier (OID) of the database, 19338 the relation in PG terms (an index or a table).

You may question why a datafile disappeared from PostgreSQL data directory, this should never happen.

The advice in this case is to restore the entire database from a backup.

Maybe you'll see more errors or errors in context in the postgresql log files.