Comments for Benny Michielsen

Comment on Legacy Code Retreat Leuven by Tim Mahy

Tim Mahy — Sat, 03 Dec 2011 15:56:05 +0000

“Probably need to look a bit into functional programming as it was quite interesting.” damn right

Comment on Entity Framework 4.1 – Change mappings at runtime by BennyM

BennyM — Sat, 03 Dec 2011 11:00:14 +0000

Are you mixing Code First with Model or DB first models? That’s not possible. Move them to other assemblies and try again.

Comment on Entity Framework 4.1 – Change mappings at runtime by BennyM

BennyM — Sat, 03 Dec 2011 10:59:10 +0000

Will be hard with Entity Framework. NHibernate has something which you can use look here: http://ayende.com/blog/4776/support-dynamic-fields-with-nhibernate-and-net-4-0 . If you really need this with EF the best way would be a dictionary, but that’s not possible with EF either. So you’ll need to create your own “key value” pair class and have a list of those in your entity to support it. I don’t know there’s an easy way.

Comment on Entity Framework 4.1 – Change mappings at runtime by BennyM

BennyM — Sat, 03 Dec 2011 10:54:28 +0000

And what question would that be?

Comment on Using Fluent NHibernate in Spring.Net by Amr Ellafy

Amr Ellafy — Mon, 28 Nov 2011 08:16:01 +0000

here is the implementation if you are using FluentNhibernate auto mapping :

protected override void PostProcessConfiguration(Configuration config)
{
base.PostProcessConfiguration(config);

var autoMappingCfg = new AutoMappingConfiguration();

var autoMap = AutoMap.AssemblyOf(autoMappingCfg)
.Conventions.Add(DefaultCascade.All(), DefaultLazy.Never())
.Conventions.Add()
.Override(map => { map.IgnoreProperty(i => i.Total); });

Fluently.Configure(config)
.Mappings(m => m.AutoMappings.Add(autoMap))
.BuildConfiguration();
}

in outmapping you don’t need to inject FluentNhibernateMappingAssemblies. so configure Sping.Net accordingly

Comment on Entity Framework 4.1 – Change mappings at runtime by Vedran Zdesic

Vedran Zdesic — Fri, 25 Nov 2011 14:27:29 +0000

Hello,

I am trying to change mappings dinamically on my edmx by using DBModelBuilder, as suggested but I am getting following error:

The type ‘MyEntityType’ was not mapped. Check that the type has not been explicitly excluded by using the Ignore method or NotMappedAttribute data annotation. Verify that the type was defined as a class, is not primitive, nested or generic, and does not inherit from EntityObject.

I thought that for EntityObjects it will be possible, but error tells me that it is not. Why?

I want to change mapping dinamically because I have the same sets of tables in database which are differed only for a suffix. I would like to have one model which I can switch between sets. I included in my project and I work with solution from codeplex: http://efmodeladapter.codeplex.com/

What is solution for that?

Vedran

Comment on Changing Entity Framework model at runtime by Jingming

Jingming — Thu, 29 Sep 2011 20:03:47 +0000

Unfortunately it did not work for me. Please help.
I’m using VS2010 and EF4.1. I got exception like this:
The EntityContainer name could not be determined. The provided EntitySet name must be qualified by the EntityContainer name, such as ‘EntityContainerName.EntitySetName’, or the DefaultContainerName property must be set for the ObjectContext.
Parameter name: entitySetName

Comment on Entity Framework 4.1 Inheritance – Table per Hierarchy by Stuart Batty

Stuart Batty — Tue, 20 Sep 2011 21:37:07 +0000

Good article, if a little brief. Especially handy was the OnModelCreating override code. Thanks.

Comment on Entity Framework 4.1 – Change mappings at runtime by Abhishek Jain

Abhishek Jain — Mon, 12 Sep 2011 14:56:32 +0000

Wonderful post Benny! I was wondering if there is any way to discover run time schema (say user defined columns in existing table) and then map them to a lsit of values (or something similar) in relevant type.
Consider following example
public partial class Customer
{
[Key]
public int Id {get; set;}
public string Name {get; set;}
}
This type maps to an sql table Customer with two columns Id and Name. Now if the system allows user to add custom columns say (U_User1, U_User2…) to the table Customer. How this can be accomodated in EF 4.1? I believe that Customer class needs one more list that can hold these user defined values. But how this can be mapped at run time?

Comment on Entity Framework 4.1 – Change mappings at runtime by persian developer

persian developer — Mon, 12 Sep 2011 07:18:03 +0000

Hi, i have been googling and found your article. Would you please take a look at this question [https://blogs.msdn.com/b/adonet/archive/2010/12/14/ef-feature-ctp5-fluent-api-samples.aspx] and say whether your solution can help me? Thanks.