Обсуждение: data from the table is getting dropped when I am restarting my application after making changes in the objects created in my application in play

I am creating one application using play in the models I had created a table and everything is working fine except when
imake changes in any of the object(fields) all the previous data in the database is getting dropped how to recover that 

On 07/18/2012 12:19 PM, rajonrole@gmail.com wrote:
> I am creating one application using play in the models I had created a table and everything is working fine except
wheni make changes in any of the object(fields) all the previous data in the database is getting dropped how to recover
that
>
This is going to need a lot more information to get an answer. In the
meantime I am going to assume when you say play you mean:

http://www.playframework.org/

My guess is you will find an answer sooner using the mailing list for
the above:

https://groups.google.com/forum/#!forum/play-framework


--
Adrian Klaver
adrian.klaver@gmail.com

On 07/19/2012 03:19 AM, rajonrole@gmail.com wrote:
> I am creating one application using play in the models I had created a table and everything is working fine except
wheni make changes in any of the object(fields) all the previous data in the database is getting dropped how to recover
that
>

You're better off asking the Play! framework people.

If you want to investigate it from the database side, set
log_statement='all' in postgresql.conf, reload or restart PostgreSQL,
and run your test. Now examine the logs and trace what the framework
did. Check to see if:

- It ever connects to PostgreSQL at all. You might be using an in-memory
h2 or derby instance and just think you're using PostgreSQL

- It ever inserts any data

- It ever commits its transactions

If you confirm that it's getting its data into PostgreSQL, you then need
to look and see if it's deleting it again by checking the log for DELETE
and TRUNCATE statements.

It could also be re-creating your tables every time it runs. Check for
"CREATE TABLE" statements.

--
Craig Ringer

Yes it is connect and insertion and udation and deletion is taking place normally but the proble of table drop occurs when I make any changes in my models in play

Please reply to the mailing list (reply all) not to me directly.

If Play framework is issuing a DROP TABLE, then you need to ask for help with the Play people. PostgreSQL has no way of knowing that you don't want the DROP TABLE your framework asks for.