Comments on: Strategies and discriminators in NHibernate http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/ Strong opinions, weakly held Thu, 23 May 2013 23:40:00 +0000 hourly 1 http://wordpress.org/?v=3.4.2 By: matt kocaj http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-4593 matt kocaj Mon, 07 May 2012 03:31:00 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-4593 Hey Jimmy, I can't get this method working for me. The line  is giving me trouble. I get the exception: NHibernate.MappingException: persistent class  PricingStrategy+FullPriceStrategy not found. Any ideas? Hey Jimmy,

I can’t get this method working for me. The line  is giving me trouble.

I get the exception: NHibernate.MappingException: persistent class 
PricingStrategy+FullPriceStrategy not found.

Any ideas?

]]> By: Anonymous http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-3963 Anonymous Thu, 29 Sep 2011 12:28:00 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-3963 Hmmm not sure, have you tried asking this question on the NH users mailing list? You're sure to get someone to answer there. Hmmm not sure, have you tried asking this question on the NH users mailing list? You’re sure to get someone to answer there.

]]> By: Rupeshmehta http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-3962 Rupeshmehta Wed, 28 Sep 2011 15:13:00 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-3962 Hello I have a question  , I will appreciate if you can help me. I have following classes with mentioned properties. GLLegalEntity is the base class, in Hibernate I am discriminating 2 subclass on column Dimension ( if Dimension =1 then Cost Center if 2 then Account ) , now I want to Discriminate this subclass as well on certain field , let say TargetLedger , if( TargetLedger="SAP" then SAPCostCenter , TargetLedger="Insight" then InsighCostCenter ) GLLegalEntity - Attribute1 -Attribute2 CostCenter : GLLegalEntity - Attribute3 SAPCostCenter : CostCenter -Attribute4 InsighCostCenter -Attribute5 Account: GLLegalEntity -Attribute6 Mapping file                                                                                                                                                   I am not sure How to Discriminate sub class. As there is no tag called discrimator in subclass. Can you please help me ? appreciate your help. Hello I have a question  , I will appreciate if you can help me.

I have following classes with mentioned properties. GLLegalEntity is the base class, in Hibernate I am discriminating 2 subclass on column Dimension ( if Dimension =1 then Cost Center if 2 then Account ) , now I want to Discriminate this subclass as well on certain field , let say TargetLedger , if( TargetLedger=”SAP” then SAPCostCenter , TargetLedger=”Insight” then InsighCostCenter )

GLLegalEntity
- Attribute1
-Attribute2

CostCenter : GLLegalEntity
- Attribute3

SAPCostCenter : CostCenter
-Attribute4

InsighCostCenter
-Attribute5

Account: GLLegalEntity
-Attribute6

Mapping file

                                                                                                                                                 

I am not sure How to Discriminate sub class. As there is no tag called discrimator in subclass.

Can you please help me ? appreciate your help.

]]> By: dario-g http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-841 dario-g Tue, 16 Feb 2010 11:17:53 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-841 Hi Can you look at my question at SO? I send to you info through the "Contact Me" but with no effect. :( Hi
Can you look at my question at SO?

I send to you info through the “Contact Me” but with no effect. :(

]]> By: Jimmy Bogard http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-840 Jimmy Bogard Sat, 25 Oct 2008 19:23:41 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-840 @Scott Can you email me through the "Contact Me" link, I'll send it right over! @Scott

Can you email me through the “Contact Me” link, I’ll send it right over!

]]> By: Scott Millett http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-839 Scott Millett Mon, 13 Oct 2008 14:05:44 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-839 Hi Jimmy, Could you possibly post the corresponding NHibernate mapping for the Product entity? Cheers Scott Hi Jimmy,

Could you possibly post the corresponding NHibernate mapping for the Product entity?

Cheers
Scott

]]> By: Stefan Lieser http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-838 Stefan Lieser Fri, 29 Aug 2008 17:39:12 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-838 @Jimmy Thats a good I idea, I will try that. Thanks! Stefan @Jimmy

Thats a good I idea, I will try that.

Thanks!
Stefan

]]> By: Jimmy Bogard http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-837 Jimmy Bogard Fri, 29 Aug 2008 11:59:43 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-837 @Stefan The other way to approach this is UserTypes. You create a custom NHibernate-persistable type, and then don't use discriminators. You'll have to put the factory logic inside the UserType. @Stefan

The other way to approach this is UserTypes. You create a custom NHibernate-persistable type, and then don’t use discriminators. You’ll have to put the factory logic inside the UserType.

]]> By: Stefan Lieser http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-836 Stefan Lieser Fri, 29 Aug 2008 09:09:07 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-836 @Ninja Yes that's the way we do it (ID on products table). But how do you map this column to the enumeration class? If you use a component mapping you can map the id-column to the id-property of the enumeration class. But then you need a static hashtable in the enumeration class to fill in the other predefined properties that otherwise would come from the lookup table. Cheers, Stefan Lieser @Ninja

Yes that’s the way we do it (ID on products table). But how do you map this column to the enumeration class? If you use a component mapping you can map the id-column to the id-property of the enumeration class. But then you need a static hashtable in the enumeration class to fill in the other predefined properties that otherwise would come from the lookup table.

Cheers,
Stefan Lieser

]]> By: Dave The Ninja http://lostechies.com/jimmybogard/2008/08/27/strategies-and-discriminators-in-nhibernate/#comment-835 Dave The Ninja Fri, 29 Aug 2008 08:13:27 +0000 /blogs/jimmy_bogard/archive/2008/08/26/strategies-and-discriminators-in-nhibernate.aspx#comment-835 @Stefan Lieser When I have done this in the past, without the lookup table, I have a CONST ID value within the class itself. See Refactoring by fowler, i think the chapter is "replace conditional with polymorphism" I would then store the const ID in the, referring to the example above, products table. Ninja @Stefan Lieser

When I have done this in the past, without the lookup table, I have a CONST ID value within the class itself.

See Refactoring by fowler, i think the chapter is “replace conditional with polymorphism”

I would then store the const ID in the, referring to the example above, products table.

Ninja

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