[CSHARP-1309] IndexKeysDefinitionBuilder should support defining multikey indexes on members of an array of embedded documents - MongoDB

XML

Word

Printable

Given the following classes:

public class User

    public Object Id { get; set; }

    public IEnumerable<Login> Logins { get; set; }

    // etc...

public class Login

    public string LoginProvider { get; set; }

    public string ProviderKey { get; set; }

    // etc...

There should be a type-safe way to create multikey indexes on members of the embedded Login documents. One possible way to express that could be:

var indexKeysDefinition = Builders<User>.IndexKeys

    .Ascending(user => user.Logins.Select(login => login.LoginProvider))

    .Ascending(user => user.Logins.Select(login => login.ProviderKey));

Use strings instead.

var indexKeysDefinition = Builders<User>.IndexKeys

    .Ascending("Logins.LoginProvider")

    .Ascending("Logins.ProviderKey");

is duplicated by

CSHARP-1340 Provide a type-safe way to create multikey indexes