One to many in UI

Locode
2

I think you’re asking about defining POCO References, it’s not really possible to add them to Database-first Locode Apps like Northwind (since you can’t code-gen a new List<Order> property for the non-existent Order type), but if you export the database models into C# types you can add the POCO Reference on Customers to the Orders table, e.g:

public class Customer
{
    //...
    [Reference]
    public List<Order> Orders { get; set; }
}

This is used a lot in https://talent.locode.dev like its Job Applications where its POCO References :

are rendered like:

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