Comments on: Article series on NHibernate and Fluent NHibernate – Part 3 http://lostechies.com/gabrielschenker/2009/09/02/article-series-on-nhibernate-and-fluent-nhibernate-part-3/ Blog about architectural patterns, best practices, coding principles and techniques Tue, 02 Apr 2013 00:12:00 +0000 hourly 1 http://wordpress.org/?v=3.4.2 By: Corey Coogan http://lostechies.com/gabrielschenker/2009/09/02/article-series-on-nhibernate-and-fluent-nhibernate-part-3/#comment-185 Corey Coogan Wed, 02 Sep 2009 14:54:15 +0000 /blogs/gabrielschenker/archive/2009/09/02/article-series-on-nhibernate-and-fluent-nhibernate-part-3.aspx#comment-185 Thanks for the article series Gabriel. I've recently jumped into both NH and FNH via a personal project I'm doing with the S#arpArchitecture for RoomParentsOnline.com. One thing I am interested in, but haven't found a good solution to, is how to have my entity base class define a byte[] Timestamp column to use for concurrency with a SQL Server database's Timestamp datatype. Ideally, I want a convention to map that property in each Entity to a Version element that would like this: <version name="Version" generated="always" unsaved-value="null" type="BinaryBlob"> <column name="Version" not-null="false" sql-type="timestamp"/> </version> The not-null="false" is required for testing against SQLITE. I've tried to use the IVersionConvention but can't get the mapping to look like I want. Automatic concurrency is an important topic to many and I think if you can get this working and show how to do it, your readers would be very interested. Thanks, Corey Thanks for the article series Gabriel. I’ve recently jumped into both NH and FNH via a personal project I’m doing with the S#arpArchitecture for RoomParentsOnline.com.

One thing I am interested in, but haven’t found a good solution to, is how to have my entity base class define a byte[] Timestamp column to use for concurrency with a SQL Server database’s Timestamp datatype.

Ideally, I want a convention to map that property in each Entity to a Version element that would like this:

generated="always"
unsaved-value="null"
type="BinaryBlob">

not-null="false"
sql-type="timestamp"/>

The not-null=”false” is required for testing against SQLITE. I’ve tried to use the IVersionConvention but can’t get the mapping to look like I want.

Automatic concurrency is an important topic to many and I think if you can get this working and show how to do it, your readers would be very interested.

Thanks,
Corey

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