How Can I Eagerly Load All Nested Related Entities in Entity Framework Core 2.0.1?

Eager Loading All Nested Related Entities in Entity Framework Core 2.0.1

In Entity Framework Core (EF Core) version 2.0.1, it's not possible to eagerly load all nested related entities by default. However, there is a workaround using custom extension methods.

The IncludePaths extension method generates all the necessary Include paths for a given entity type. These paths can then be used to eagerly load nested related entities with the Include extension method.

Here's an example of how to use these extension methods to eagerly load all nested related entities for the Order entity:

public virtual async Task<IEnumerable<Order>> GetAllAsync(Expression<Func<Order, bool>> predicate = null)
{
    var query = Context.Set<Order>()
        .Include(Context.GetIncludePaths(typeof(Order));
    if (predicate != null)
        query = query.Where(predicate);
    return await query.ToListAsync();
}

This approach allows for eager loading of all nested related entities, regardless of their depth or complexity. It's a powerful tool for optimizing database queries and improving performance.

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