Esempio n. 1
0
func main() {
	var err error

	// open database
	db, err := sql.Open("postgres", "postgres://booktest:[email protected]/booktest")
	if err != nil {
		log.Fatal(err)
	}

	// create an author
	a := models.Author{
		Name: "Unknown Master",
	}

	// save author to database
	err = a.Save(db)
	if err != nil {
		log.Fatal(err)
	}

	// create transaction
	tx, err := db.Begin()
	if err != nil {
		log.Fatal(err)
	}

	// save first book
	now := time.Now()
	b0 := models.Book{
		AuthorID:  a.AuthorID,
		Isbn:      "1",
		Title:     "my book title",
		Booktype:  models.FictionBookType,
		Year:      2016,
		Available: &now,
	}
	err = b0.Save(db)
	if err != nil {
		log.Fatal(err)
	}

	// save second book
	b1 := models.Book{
		AuthorID:  a.AuthorID,
		Isbn:      "2",
		Title:     "the second book",
		Booktype:  models.FictionBookType,
		Year:      2016,
		Available: &now,
		Tags:      models.StringSlice{"cool", "unique"},
	}
	err = b1.Save(db)
	if err != nil {
		log.Fatal(err)
	}

	// save third book
	b2 := models.Book{
		AuthorID:  a.AuthorID,
		Isbn:      "3",
		Title:     "the third book",
		Booktype:  models.FictionBookType,
		Year:      2001,
		Available: &now,
		Tags:      models.StringSlice{"cool"},
	}
	err = b2.Save(db)
	if err != nil {
		log.Fatal(err)
	}

	// save fourth book
	b3 := models.Book{
		AuthorID:  a.AuthorID,
		Isbn:      "4",
		Title:     "4th place finisher",
		Booktype:  models.NonfictionBookType,
		Year:      2011,
		Available: &now,
		Tags:      models.StringSlice{"other"},
	}
	err = b3.Save(db)
	if err != nil {
		log.Fatal(err)
	}

	// tx commit
	err = tx.Commit()
	if err != nil {
		log.Fatal(err)
	}

	// upsert, changing ISBN and title
	b4 := models.Book{
		BookID:    b3.BookID,
		AuthorID:  a.AuthorID,
		Isbn:      "NEW ISBN",
		Booktype:  b3.Booktype,
		Title:     "never ever gonna finish, a quatrain",
		Year:      b3.Year,
		Available: b3.Available,
		Tags:      models.StringSlice{"someother"},
	}
	err = b4.Upsert(db)
	if err != nil {
		log.Fatal(err)
	}

	// retrieve first book
	books0, err := models.BooksByTitle(db, "my book title", 2016)
	if err != nil {
		log.Fatal(err)
	}
	for _, book := range books0 {
		fmt.Printf("Book %d (%s): %s available: %s\n", book.BookID, book.Booktype, book.Title, book.Available.Format(time.RFC822Z))
		author, err := book.Author(db)
		if err != nil {
			log.Fatal(err)
		}

		fmt.Printf("Book %d author: %s\n", book.BookID, author.Name)
	}

	// find a book with either "cool" or "other" tag
	fmt.Printf("---------\nTag search results:\n")
	res, err := models.AuthorBookResultsByTags(db, models.StringSlice{"cool", "other", "someother"})
	if err != nil {
		log.Fatal(err)
	}
	for _, ab := range res {
		fmt.Printf("Book %d: '%s', Author: '%s', ISBN: '%s'\nTags: ", ab.BookID, ab.BookTitle, ab.AuthorName, ab.BookIsbn)
		for _, s := range ab.BookTags {
			fmt.Printf("'%s' ", s)
		}
		fmt.Println()
	}

	// call say_hello(varchar)
	str, err := models.SayHello(db, "john")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("SayHello response: %s\n", str)
}
Esempio n. 2
0
func main() {
	var err error

	db, err := sql.Open("postgres", "postgres://booktest:[email protected]/booktest")
	if err != nil {
		log.Fatal(err)
	}

	// create an author
	a := models.Author{
		Isbn:    "some isbn",
		Name:    "Author Name",
		Subject: "a subject",
	}

	// save author to database
	err = a.Save(db)
	if err != nil {
		log.Fatal(err)
	}

	// create book in a transaction
	tx, err := db.Begin()
	if err != nil {
		log.Fatal(err)
	}
	b := models.Book{
		AuthorID: a.AuthorID,
		Title:    "my book title",
		Booktype: models.FictionBookType,
		Year:     2016,
	}
	err = b.Save(db)
	if err != nil {
		log.Fatal(err)
	}
	err = tx.Commit()
	if err != nil {
		log.Fatal(err)
	}

	// retrieve created book
	books, err := models.BooksByTitle(db, "my book title", 2016)
	if err != nil {
		log.Fatal(err)
	}
	for _, book := range books {
		fmt.Printf("Book %d (%s): %s\n", book.BookID, book.Booktype, book.Title)
		author, err := book.Author(db)
		if err != nil {
			log.Fatal(err)
		}

		fmt.Printf("Book %d author: %s\n", book.BookID, author.Name)
	}

	// call say_hello(varchar)
	str, err := models.SayHello(db, "john")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("SayHello response: %s\n", str)
}