annotated(with:)

Appends association aggregates to the selected columns.

func annotated(with aggregates: [AssociationAggregate<RowDecoder>]) -> Self

Mangled symbol

s4GRDB16DerivableRequestPAAE9annotated4withxSayAA20AssociationAggregateVy10RowDecoderQzGG_tF What are these?

FNV24 hash: 8SNN4

For example:

struct Author: TableRecord, FetchableRecord, Decodable {
    static let books = hasMany(Book.self)
}
struct Book: TableRecord, FetchableRecord, Decodable { }

struct AuthorInfo: FetchableRecord, Decodable {
    var author: Author
    var bookCount: Int
}

// SELECT author.*, COUNT(DISTINCT book.id) AS bookCount
// FROM author
// LEFT JOIN book ON book.authorId = author.id
// GROUP BY author.id
let authorInfos = try Author.all()
    .annotated(with: [Author.books.count])
    .asRequest(of: AuthorInfo.self)
    .fetchAll(db)