[Cosmos] Support collections of scalar types

[Chiliyago]

An entity class with a property of List or ICollection of Int does not work.

public class Foo
 {
     public ICollection<int> RowValues { get; set; }
     public ICollection<int> ColValues { get; set; }
 }

Here is the error message.
The property 'RowValues' on entity type 'Models.Foo' has not been added to the model or ignored.

Is this a bug or am I doing this wrong?

Thanks

[rowanmiller]

EF doesn't support storing collections of scalar types. The best workaround at the moment would be to add [NotMapped] to those properties and then have another property that wraps the ICollection<int> represents the serialized for of the data (such a comma-separated string). Then let EF map to that property.

[bjorn-ali-goransson]

Any tips on how I could configure EF Core to always map IEnumerable<int> to string and the value stored to DB will be its JSON representation?

I.e. custom mapping, serializing and parsing based on type (that is, general - not based on property per se).