Problem using SQLite :memory: with NHibernate

c# nhibernate sqlite orm integration-testing
Chris Canal picture Chris Canal · Oct 9, 2008 · Viewed 16.4k times · Source

I use NHibernate for my dataacess, and for awhile not I've been using SQLite for local integration tests. I've been using a file, but I thought I would out the :memory: option. When I fire up any of the integration tests, the database seems to be created (NHibernate spits out the table creation sql) but interfacting with the database causes an error.

Has anyone every gotten NHibernate working with an in memory database? Is it even possible? The connection string I'm using is this:

Data Source=:memory:;Version=3;New=True

Answer

Sean Carpenter picture Sean Carpenter · Oct 11, 2008

A SQLite memory database only exists as long as the connection to it remains open. To use it in unit tests with NHibernate:
1. Open an ISession at the beginning of your test (maybe in a [SetUp] method).
2. Use the connection from that session in your SchemaExport call.
3. Use that same session in your tests.
4. Close the session at the end of your test (maybe in a [TearDown] method).

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