package bouquins import ( "database/sql" ) // SUB QUERIES // func (app *Bouquins) queryAuthors(limit, offset int, sort, order string) ([]*AuthorAdv, bool, error) { authors := make([]*AuthorAdv, 0, limit) stmt, err := app.psSortAuthors(AUTHORS, sort, order) if err != nil { return nil, false, err } rows, err := stmt.Query(limit+1, offset) if err != nil { return nil, false, err } defer rows.Close() more := false for rows.Next() { if len(authors) == limit { more = true } else { author := new(AuthorAdv) if err := rows.Scan(&author.Id, &author.Name, &author.Count); err != nil { return nil, false, err } authors = append(authors, author) } } if err := rows.Err(); err != nil { return nil, false, err } return authors, more, nil } func (app *Bouquins) queryAuthorBooks(author *AuthorFull) error { stmt, err := app.ps(AUTHOR_BOOKS) if err != nil { return err } rows, err := stmt.Query(author.Id) if err != nil { return err } defer rows.Close() series := make(map[int64]*Series, 0) for rows.Next() { book := new(Book) var seriesId sql.NullInt64 var seriesName sql.NullString if err = rows.Scan(&book.Id, &book.Title, &book.SeriesIndex, &seriesName, &seriesId); err != nil { return err } if seriesId.Valid && seriesName.Valid { series[seriesId.Int64] = &Series{ seriesId.Int64, seriesName.String, } } author.Books = append(author.Books, book) } if err := rows.Err(); err != nil { return err } author.Series = make([]*Series, 0, len(series)) for _, s := range series { author.Series = append(author.Series, s) } return nil } func (app *Bouquins) queryAuthorAuthors(author *AuthorFull) error { stmt, err := app.ps(AUTHOR_COAUTHORS) if err != nil { return err } rows, err := stmt.Query(author.Id, author.Id) if err != nil { return err } defer rows.Close() for rows.Next() { coauthor := new(Author) if err = rows.Scan(&coauthor.Id, &coauthor.Name); err != nil { return err } author.CoAuthors = append(author.CoAuthors, coauthor) } if err := rows.Err(); err != nil { return err } return nil } func (app *Bouquins) queryAuthor(id int64) (*AuthorFull, error) { stmt, err := app.ps(AUTHOR) if err != nil { return nil, err } author := new(AuthorFull) author.Id = id err = stmt.QueryRow(id).Scan(&author.Name) if err != nil { return nil, err } return author, nil } // DB LOADS // func (app *Bouquins) AuthorsAdv(limit, offset int, sort, order string) ([]*AuthorAdv, bool, error) { authors, more, err := app.queryAuthors(limit, offset, sort, order) if err != nil { return nil, false, err } return authors, more, nil } func (app *Bouquins) AuthorFull(id int64) (*AuthorFull, error) { author, err := app.queryAuthor(id) if err != nil { return nil, err } err = app.queryAuthorBooks(author) if err != nil { return nil, err } err = app.queryAuthorAuthors(author) if err != nil { return nil, err } return author, nil }