On 3/24/07, donleyp <[EMAIL PROTECTED]> wrote:


I've just started using AppFuse on a project at work and it really helped
me
get up and running quickly. Thanks to all the devs on this project for the
great product.

We use Oracle here and I did not want to start a project using MySQL and
possibly get stuck with a bunch of migration problems right before
release,
so the first thing I did was to deviate from the Quick Start guide and
plug
in a dependency to the Oracle drivers and the necessary configuration
parameters into my POM (this was a breeze: another tip of the hat to you
guys).


FYI, in 2.0 M4, we added "database profiles" so it should be much easier to
switch databases.

http://raibledesigns.com/rd/entry/database_profiles_in_appfuse_2

Matt


Everything worked great except for the integration tests! They kept failing
with constraint violations. I pressed on and added my first persistent
object with attendant UI using the tutorial as a guide. Again this was a
breeze, but I was getting the same integrity violations on my first three
attempts to save a new object. After the first three attempts, everything
worked great. This behavior is what tipped me off. The oracle sequence
object that is created by the hbm2ddl task is initialized to 1. My sample
data was exactly three rows numbered 1, 2, and 3. This was also the case
with the two sample users in sample-data.xml.

I actually have a solution to my own problem...

Setting the "id" column values in all of the sample data to negative
values
will safely place them outside the range of values generated by the
sequence. This is actually a pretty good practice that I have used in the
past to make test data easier to handle. Not only does it avoid collisions
with various artificial key generators, it also makes it easy to insert
and
clean out test data in production databases for troubleshooting.

Does anyone else think it would be a good idea for appfuse to adopt this
policy of using negative ids for sample data, or are there any databases
out
there that would choke on this? Obviously, Oracle is fine. I know that SQL
Server and MySQL would have no problem with it either.

Donley

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