[OPEN-ILS-DEV] config.global_flag cat.bib.use_id_for_tcn

[Jason Stephenson]

Quoting Alan Rykhus <alan.rykhus at mnsu.edu>:

> Hello,
>
> I had a question about the config.global_flag cat.bib.use_id_for_tcn
> setting.
>
> I was working on a migration and was having issues because of this. I
> was planning on using the tcn_value for linking purposes later on as I
> had in a previous conversion. I put the a number in here from the old
> system that helps me find the bib and link items, loans, holds, etc. to
> the bib.
>
> 1. What ramifications will we have if we set this flag to false?

Your bib ids will not match the TCN.



>
> 2. What happens if we then set it to true after we are done with the
> migration? I can see where the actual biblio.record_entry.id will
> eventually become the same value as migrated
> biblio.record_entry.tcn_value entries and there would be duplicates.
> Will this be a problem?

Yes, it most likely will. If you set the flag to false, you should  
leave it false. TCNs are supposed to be unique per record source.


>
> I see there are a couple of bug reports on this(really 1, the second is
> a duplicate). But I did not find anything referring to the functionality
> this flag is trying to accomplish.
>
> thanks -- al
> --
> Alan Rykhus
> PALS, A Program of the Minnesota State Colleges and Universities
> (507)389-1975
> alan.rykhus at mnsu.edu
> "It's hard to lead a cavalry charge if you think you look funny on a
> horse" ~ Adlai Stevenson
>
>



-- 
Jason Stephenson
Assistant Director for Technology Services
Merrimack Valley Library Consortium
Chief Bug Wrangler, Evergreen ILS