Merge replicaton: How to customize conflict detection, resolution?

We have a simple problem:
We have a table Assets[asset_id, title] and a table
Asset_Versions[asset_id, version_no]. In addition, there are columns
added by replication for storing the ROWGUID.
After synchronzation, assume both Node1 and Node2 have
Assets(1,'XYZ') and Assets_Versions(1,1)
Before syncing again a new version is added at both nodes so that both
Node1 and Node2 have
Assets(1,'XYZ') and Assets_Versions(1,1)(1,2)
Now when it syncs again, the publisher will make another entry of
Assets_Versions(1,2) in the subscriber thus disturbing the business
logic because the Subscriber will now have 2 entries for version_no=2.
How can we make Replication identify this as a conflict. Can we write
a conflict resolver for such a situation?
Thanks and regards,
YashWhat is the PK on Assets_Versions? I think if it includes the id and version,
then this will get identified as a conflict.
HTH,
Paul Ibison|||Actually I can't test it here but I believe I was incorrect earlier and that
you'll just get an error instead - perhaps you can test this for me. What I'm
thinking of now is that you could just have id and version in the
asset_versions table and update rather than add new versions:
ID, version, guid
1,1,xxx
on next version we have:
ID, version, guid
1,2,xxx
If this fits in with your application it'll work as this will cause a
conflict if done on 2 nodes before syncing.
HTH,
Paul Ibison|||A primary key or unique index on Assets_Versions should prevent such a
double insert/
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<yashgt@.gmail.com> wrote in message
news:1187325787.241826.116170@.m37g2000prh.googlegroups.com...
> We have a simple problem:
> We have a table Assets[asset_id, title] and a table
> Asset_Versions[asset_id, version_no]. In addition, there are columns
> added by replication for storing the ROWGUID.
> After synchronzation, assume both Node1 and Node2 have
> Assets(1,'XYZ') and Assets_Versions(1,1)
> Before syncing again a new version is added at both nodes so that both
> Node1 and Node2 have
> Assets(1,'XYZ') and Assets_Versions(1,1)(1,2)
> Now when it syncs again, the publisher will make another entry of
> Assets_Versions(1,2) in the subscriber thus disturbing the business
> logic because the Subscriber will now have 2 entries for version_no=2.
> How can we make Replication identify this as a conflict. Can we write
> a conflict resolver for such a situation?
> Thanks and regards,
> Yash
>sql