CSLA 6 way to LazyGetProperty?

[michaelcsikos]

What's the new way to LazyGetProperty? I can't see anything in the samples.

[rockfordlhotka]

      get => LazyGetProperty<PersonEdit>(ChildProperty, () 
        => ApplicationContext.GetRequiredService<IDataPortal<<PersonEdit>>().Fetch(123));

or

      get => LazyGetPropertyAsync<PersonEdit>(ChildProperty, 
        ApplicationContext.GetRequiredService<IDataPortal<<PersonEdit>>().FetchAsync(123));

[TheCakeMonster]

It looks like this answer might need updating now, as I think the GetDataPortal method has been removed.

[Chicagoan2016]

@TheCakeMonster I thought we made the RelationshipTypes enum obsolete?

[rockfordlhotka]

Not the enum, but some members. The LazyLoad member (I think) is the only one still used.

[KC7465128305]

Hi Rocky,

I just upgraded Csla from 5.5.3 to 6.1.0 and the FieldManager.FieldExists always returns true in a collection property causing the property to return null which breaks my code.

Here is my existing old code in Csla 5.5.3. What is the equivalent in Csla 6.1.0?
public static readonly PropertyInfo OperandsProperty = RegisterProperty(p => p.Operands);
internal Operands Operands
{
get
{
if (!(FieldManager.FieldExists(OperandsProperty)))
LoadProperty(OperandsProperty,
this.IsNew
? Operands.NewOperands()
: Operands.GetOperands(this));

            return GetProperty<Operands>(OperandsProperty);
    }

}

Thanks very much if you can help!

[rockfordlhotka]

When you declare the property via RegisterProperty are you setting the relationship type?

RelationshipTypes.LazyLoad is required.

[KC7465128305]

Hi Rocky,

That fixes it. Thanks.

After I upgraded Csla from 5.5.3 to 6.1.0, I noticed there is a noticeable slowness in the app that I didn't notice when I upgraded Csla from 4.X to 5.X. My code in 5.5.3 is still the old-style DataPortal_XYZ and I only use DI in 6.1.0. and I suspect this is the reason it is slower. I read that Csla 5.X do a lot of things Csla 4.X didn't do and this account for its slowness. I only use Csla for one thing, and that is N Level Undo. I wonder if there is a way you have an enum so users of Csla can pick and choose what functions they want to enable and what functions they can disable. This way a user can save a lot of overhead for functions they don't use anyway.

If this is possible, it will be great. Thanks!

[ashishsinha24]

I'm encountering difficulties configuring a straightforward scenario. Imagine I have a database with two tables: "Person" containing Id , Name and CityId, and "Location" with CityId, CityName and State.

I've successfully created a ReadOnlyListBase for persons, but when attempting to include the location information (which is in a readonlybase LocationInfo) in PersonInfo, various errors arise, such as:

ChildDataportal failure.
Stack overflow.

My objective is to display the Id, PersonName, City, and State in a grid. While I can successfully retrieve the PersonId and Name, issues arise when trying to integrate location details.

[kcabral817]

The stack overflow can occur if there is a collection of persons that have location. If you're using EF Core, their maybe a virtual member that points back to the Person. This is where I've experienced a stack overflow because it'll be self referencing for ever. But at this point, it's purely conjecture on my part, because I would need to see the class structure and how are you mapping between the EF core (if used) and the CSLA class? If you're using Automapper, I'd start there. But in any case, I would need to see the class structures to assit. Have a nice day. Kevin https://rb.gy/syiuf

…

________________________________ From: Ashish Sinha ***@***.***> Sent: Thursday, November 23, 2023 11:27 AM To: MarimerLLC/csla ***@***.***> Cc: Subscribed ***@***.***> Subject: Re: [MarimerLLC/csla] CSLA 6 way to LazyGetProperty? (Discussion #2829) I'm encountering difficulties configuring a straightforward scenario. Imagine I have a database with two tables: "Person" containing Id and Name, and "Location" with CityId, CityName and State. I've successfully created a ReadOnlyListBase for persons, but when attempting to include the location information in PersonInfo, various errors arise, such as: ChildDataportal failure. Stack overflow. My objective is to display the Id, PersonName, City, and State in a grid. While I can successfully retrieve the PersonId and Name, issues arise when trying to integrate location details. — Reply to this email directly, view it on GitHub<#2829 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AGJTVDRP3XGSNCOGBEVDHI3YF52PHAVCNFSM5QUH3MQ2U5DIOJSWCZC7NNSXTOKENFZWG5LTONUW63SDN5WW2ZLOOQ5TONRVGM3DCNY>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>