Add Support for disabling Column deletion if required

[nitinpadalia]

Hi,

I feel schemasync is a great feature but sometimes it may create disaster specially when some column is deleted from code and that gets synced to database. So I propose to have it as an option whether to delete columns or not.

I've identified some changes, shall I push it?

-Nitin

[valchkou]

Hi Nitin, that's make sense. What is suggested behavior ? do not sync that column at all ?

[nitinpadalia]

I believe we could have one more sync() API which will have switch whether to sync deleted columns or not if that switch is ON we do not sync deleted columns.

[nitinpadalia]

Yes I've done changes. How shall we proceed so that you could review and merge it to the master.

-Nitin

On Tue, Apr 14, 2015 at 11:49 PM, Eugene notifications@github.com wrote:

Hi Nitin, that's make sense. Did you make these changes already?

— Reply to this email directly or view it on GitHub https://github.com/valchkou/cassandra-driver-mapping/issues/54#issuecomment-93006429 .

[valchkou]

Nitin, this should be more flexible as may be potentially used by other developers too. I already have the flag mappingSession.setDoNotSync(true); which prevent from sync at all. It probably makes sense to extend this API with sync options. So you will be able to control which entities to sync and how.

I will make this change shortly

[ranvijaychoudhary]

Supporting sync option in generic way for each operations will be really good.

[valchkou]

this will be released on 4/22 (tomorrow)

[nitinpadalia]

:) Great... Thanks!

[valchkou]

released. Please upgrade to latest ver 2.1.5 explained here: https://github.com/valchkou/cassandra-driver-mapping#jump_sync