[postmodern-devel] Error when no persistent field

[Marijn Haverbeke]

Good point. This and similar table-does-not-match-class errors are
bound to come up a lot, so I've added some more helpful error
messages.

Cheers,
Marijn

>  I defined an object with metaclass dao-class but forgot to add any col-type
> options, this results in a rather cryptic error that is hard to get out of
> in LispWorks:
>
>  P1 10 > (select-dao 'enumeration)
>
>  Error: The assertion (= (LENGTH POSTMODERN::QUERY-FIELDS)
> POSTMODERN::N-DAO-FIELDS) failed.
>   1 (continue) Retry assertion.
>   2 (abort) Return to level 0.
>   3 Return to top loop level 0.
>
>  Type :b for backtrace, :c <option number> to proceed,  or :? for other
> options
>
>  P1 11 : 1 > :bq
>
>  (HARLEQUIN-COMMON-LISP:SUBFUNCTION 1 POSTMODERN::BUILD-ROW-READER) <-
> CL-POSTGRES::SEND-QUERY
>  <- (HARLEQUIN-COMMON-LISP:SUBFUNCTION (LABELS #:G244377)
> CL-POSTGRES:EXEC-QUERY) <- CL-POSTGRES:EXEC-QUERY <- LET
>  <- EVAL <- CAPI::CAPI-TOP-LEVEL-FUNCTION <- CAPI::INTERACTIVE-PANE-TOP-LOOP
>  <- (HARLEQUIN-COMMON-LISP:SUBFUNCTION MP::PROCESS-SG-FUNCTION
> MP::INITIALIZE-PROCESS-STACK)
>
>  I can live with this, but maybe it would be good to make this more user
> friendly.
>
>  Cheers,
>
>  Sven
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