Create tests for Many-To-Many relationships

[papafe]

We need to have tests for many-to-many relationships like the following one:

    public class User : RealmObject
    {
        [PrimaryKey]
        public string Id { get; set; } = Guid.NewGuid().ToString();

        public string Name { get; set; }

        public IList<ShoppingList> ShoppingLists { get; }
    }

    public class ShoppingList : RealmObject
    {
        [PrimaryKey]
        public string Id { get; set; } = Guid.NewGuid().ToString();

        public string Name { get; set; }

        [Backlink(nameof(User.ShoppingLists))]
        public IQueryable<User> Owners { get; }
    }

We also need to check that the documentation has examples on how to create backlinks for those

[nirinchev]

We should also test that backlinks work with dictionaries and sets.

[carbonete]

Hi, https://docs.mongodb.com/realm/sdk/dotnet/fundamentals/relationships/ Not contain a clear many to many topic. Example at one-to-many relationship not use relation to explain.

How we proceed when found doc problem, I try "Give Feedback" at documentation site but i never receive return or problem is corrected.

Thanks

[carbonete]

Hi, many to many is explained at https://docs.mongodb.com/realm/sdk/dotnet/examples/define-a-realm-object-model/#std-label-dotnet-index-property-example And in many to many topic box example is not many to many.

[papafe]

Hi @carbonete, you're right that the current documentation is not very clear about many-to-many relationships. We will try to make it more clear, thanks for your feedback.

[DominicFrei]

Hi @carbonete !

I have talked to our docs team. We'll work on figuring out why you did get an answer to your feedback.

In the meantime I've also talked to them about the examples. They are indeed misleading as of today. The reason is that this was the recommended way before we introduces embedded objects.

After they have been introduced relationships can be enforced more clearly:

• one-to-one: embedded object (a Person having a Dog but that Dog being an embedded object)
• one-to-many: normal object link (a Dog having an owner of type Person)
• many-to-many: lists (a Person having a List<Dog>)

Our docs team is aware of that fact now and will work on updating the documentation.