Example 1: Select — Field Projection

The Select<T> extension takes a list of field paths. The body is a bare JSON array of strings; inside a Filter or a Segment the same list goes under selects. Each variant below shows a different projection style.

A typed row is still a whole T: the members you did not ask for come back at their defaults rather than being absent.

Direct scalars

["Id", "Name", "Price"]

Dotted path through reference navigation

["Id", "Name", "Category.Name"]

Category is projected with only the requested Name sub-field (Id auto-included).

Dotted path through collection navigation

["Id", "Name", "Category.Vendors.Id"]

Category.Vendors is a collection — each Vendor element is projected with only its Id (Id auto-included).

Whole navigation object (non-dotted)

["Id", "Name", "Category"]

The entire Category object is bound as-is.

Whole collection (non-dotted)

["Id", "Name", "Brands"]

The entire Brands collection is bound as-is.

Related

• Select extension
• SelectDynamic example — same paths, dynamic return type.