Entity Framework Classic AlsoInclude

Description

You can chain multiple related objects to the query result by using the AlsoInclude and ThenInclude methods. The AlsoInclude method doesn't move the chaining level. It allows you to include multiple related objects from the same level.

AlsoInclude is a syntactic sugar method to make it easier and clearer to include multiple related objects.

ctx.OrderDetails
    .Include(orderDetail => orderDetail.Product)
        .AlsoInclude(product => product.Category)
        .AlsoInclude(product => product.Supplier)
    .ToList();

Try it: NET Core | NET Framework

Note

  • If you want to reset the level to the root, use Include
  • If you want to include items from the next level, use ThenInclude

Limitations

DbQuery

Chaining includes only work if the first include call is from a DbQuery. If you used some LINQ and the query is currently an IQueryable, you can use the method AsDbQuery to tell the compiler that's a DbQuery. This restriction is currently required to avoid some side impact with queries that are not directly using the DbQuery class.

ctx.OrderDetails
    .Where(orderDetail => orderDetail.Quantity > 1)
    .AsDbQuery()
    .Include(orderDetail => orderDetail.Product)
        .AlsoInclude(product => product.Category)
        .AlsoInclude(product => product.Supplier)
    .ToList();

Try it: NET Core | NET Framework



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