How can I check whether an eagerly loaded attribute's filed is null in EF core 6?

CodePudding user response：

Quoting MS EF Docs:

Eager loading means that the related data is loaded from the database as part of the initial query.

Then, load it and just check if it is null:

using (var context = new BloggingContext())
{
    var blogs = context.Blogs
        .Include(blog => blog.Owner)
        .ToList();

    foreach(var blog in blogs)
    {
        var no_owner = blog.Owner == null; //< -- here
        // ... more code
    }

}