Discriminator column with formula is not included in insert statment of an Entity in NHibernate

My problem is exactly same as described in following post but it hasn't been answered and it's 4 years old post!!!

https://forum.hibernate.org/viewtopic.php?f=1&t=976655

In summary, I have table per class hierarchy inheritance and I am using formula in discriminator column. When I try to insert new record (Entity) the insert fails because the generated sql doe开发者_运维知识库sn't include the discriminator column.

Alternatively I could define another property that maps to the column and make discriminator's "insert" attribute to false. However I don't like this approach as it will force me to almost rewrite what formula was there for in the domain object.

I would really appreciate if anyone else has fixed this problem some better way.

<class name="Account" table="ACCOUNT" abstract ="true">

<discriminator column ="ACCOUNT_TY" type ="string" formula="(case when ACCOUNT_TY in ('CASHCARD','ORPHAN','BLACK','EXTERNAL', 'INTERNAL') then 'OTHER' else ACCOUNT_TY end)" />


<subclass name ="CreditCardAccount" extends ="Account" discriminator-value="PREPAY" dynamic-update="true" >
<subclass name ="OtherAccount" extends ="Account" discriminator-value="OTHER" dynamic-update="true">
<subclass name ="PostpayAccount" extends ="Account" discriminator-value="POSTPAY" dynamic-update="true">

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For those wondering I got the answer in following thread

http://groups.google.com/group/nhusers/browse_frm/thread/3cbf9d9589b6d203

basically if you are using formula in discriminator column, you need to define another property and mark the discriminator 's attribute insert = "false"

class name="Account" table="ACCOUNT" abstract ="true">

<discriminator column ="ACCOUNT_TY" type ="string" formula="(case when ACCOUNT_TY in  ('CASHCARD','ORPHAN','BLACK','EXTERNAL', 'INTERNAL') then 'OTHER' else ACCOUNT_TY end)" insert = "false" />
<property name = "AccountType" column = "ACCOUNT_TY" />

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See if this post helps you out: http://nhibernate.info/blog/2010/05/15/not-so-hidden-gems-of-nhibernate-formula-discriminators.html