Value cannot be null. Parameter name: persistentType

[Bob]

I created an OpenAccess Fluent project in Visual Studio 2010.  I added a few models and some mappings.  This project built fine in VS 2010.  I then installed the latest internal build (2012.1.427.1) of OpenAccess (for VS 11 support).

Upon building I received the following error:
Value cannot be null.
Parameter name: persistentType
ExceptionString:
System.ArgumentNullException: Value cannot be null.
Parameter name: persistentType
   at Telerik.OpenAccess.Metadata.Fluent.NavigationPropertyConfiguration.FindMetaMember(MetaPersistentType persistentType, MemberInfo targetMemberInfo)
   at Telerik.OpenAccess.Metadata.Fluent.JoinTableAssociationFactory.GetAssociationParts(Type entityType, IJoinTableColumnFilter columnFilter, AssociationPartType associationPartType)
   at Telerik.OpenAccess.Metadata.Fluent.JoinTableAssociationFactory.GetTargetJoinTableConstaintAssociationParts(Type targetType, IList`1 sourceColumns)
   at Telerik.OpenAccess.Metadata.Fluent.JoinTableAssociationFactoryBase.AddMetaConstraint(FluentMetadataSource fluentMappingSource, MetadataContainer metadataContainer)
   at Telerik.OpenAccess.Metadata.Fluent.NavigationPropertyConfiguration.AddRelationalItem(FluentMetadataSource fluentMappingSource, MetadataContainer metadataContainer, MetaTable table)
   at Telerik.OpenAccess.Metadata.Fluent.MappingConfiguration.AddSlaveAssociationMapping(FluentMetadataSource fluentMappingSource, MetadataContainer metadataContainer)
   at Telerik.OpenAccess.Metadata.Fluent.FluentMetadataSource.ProcessAssociations(MetadataContainer metadataContainer)
   at Telerik.OpenAccess.Metadata.Fluent.FluentMetadataSource.CreateModel()
   at Telerik.OpenAccess.Metadata.Fluent.FluentMetadataSource.GetModelCore(MetadataContainer old)
   at Telerik.OpenAccess.Sdk.Enhancer.Enhancer.CrossDomainRunImpl(AssemblyLoader assemblyLoader)
   at Telerik.OpenAccess.Sdk.Enhancer.EnhancerBase.CrossDomainRun()

[Serge]

Hello Bob, 

 I have been trying to reproduce this exception but I haven't been able to. Can you please send us your mapping project, so that I can debug it locally. 

I am looking forward to resolving this issue. 
 
Greetings,
Serge
the Telerik team

[Omair Shakeel]

Hi

 

I am getting this same exception after updating to Fluent model. DId you figure out the reason why this could happen and how to avoid it? 

 

Thanks

[Viktor Zhivkov]

Hi Omair,

Exceptions like the one below may indicate mis-configured Fluent mapping for one of the sides of an association (most probably a Many-to-Many one) or a property of array, list, collection or dictionary of primitive type (e.g public string[] Tags { get; set;}).
Please review your code if it complies with the documentation guidelines:

• Many-to-Many mapping
• One-To-Many mapping
• Primitive collections

I would like to suggest to you to open separate forum thread describing the issue you are experiencing as this thread is pretty old and we have difficulties identifying the correct version that you are using (compared to the one of the original poster).

Regards,
Viktor Zhivkov
Telerik