logging issue

[amboli]

hi
i am using postgres and codeigniter and rest_auth is basic
i am set rest_enable_logging true its work fine but one of incidence i was seen

**Invalid query: UPDATE "logs" SET "rtime" = 0.079057931900024
WHERE "id" = ''

pg_query(): Query failed: ERROR: invalid input syntax for integer**

gives error
not regularly but it happen
could you give me solution on that

here i attache the file rest_controller which i modify in some position...

REST_Controller.txt