Name   string `gorm:"primarykey"`
		Value  string
	}

	type Book struct {
		ID     int
		Name   string
		Labels []Label
	}

	DB.Migrator().DropTable(&Label{}, &Book{})
	if err := DB.AutoMigrate(&Label{}, &Book{}); err != nil {
		t.Fatalf("failed to migrate, got %v", err)
	}

	book := Book{
		Name: "my book",
		Labels: []Label{
			{Name: "region", Value: "emea"},
		},
	}

# Learn { #learn }

Here are the introductory sections and the tutorials to learn **FastAPI**.

}

type Author struct {
	gorm.Model
}

type Book struct {
	gorm.Model
	Author   Author
	AuthorID uint
}

func (Book) TableName() string {
	return "my_schema.a_very_very_very_very_very_very_very_very_long_table_name"
}

func TestParseConstraintNameWithSchemaQualifiedLongTableName(t *testing.T) {
	s, err := schema.Parse(
		&Book{},
		&sync.Map{},

///

For example, this custom validator checks that the item ID starts with `isbn-` for an <abbr title="ISBN means International Standard Book Number">ISBN</abbr> book number or with `imdb-` for an <abbr title="IMDB (Internet Movie Database) is a website with information about movies">IMDB</abbr> movie URL ID:

///

Например, эта кастомная проверка убеждается, что ID элемента начинается с `isbn-` для номера книги <abbr title="ISBN означает International Standard Book Number – Международный стандартный книжный номер">ISBN</abbr> или с `imdb-` для ID URL фильма на <abbr title="IMDB (Internet Movie Database) — веб‑сайт с информацией о фильмах">IMDB</abbr>:

            // TODO: This breaks the provider
            attributes.put("stylesdir", stylesDir.get().getAsFile().getAbsolutePath());
            attributes.put("stylesheet", "manual.css");
            attributes.put("doctype", "book");
            attributes.put("imagesdir", "img");
            attributes.put("nofooter", true);
            attributes.put("javadocPath", "../javadoc");
            attributes.put("sectanchors", true);

///

Por ejemplo, este validador personalizado comprueba que el ID del ítem empiece con `isbn-` para un número de libro <abbr title="International Standard Book Number – Número Estándar Internacional de Libro">ISBN</abbr> o con `imdb-` para un ID de URL de película de <abbr title="IMDB (Internet Movie Database) es un sitio web con información sobre películas">IMDB</abbr>:

			iamLogIf(ctx, err)
		}
		// No need to return errors for failed expiration of STS users
	}

	took := time.Since(purgeStart).Seconds()
	if took > maxDurationSecondsForLog {
		// Log if we took a lot of time to load.
		logger.Info("IAM expired STS purge took %.2fs", took)
	}

	// Store the newly populated map in the iam cache. This takes care of
	// removing stale entries from the existing map.

					t.Errorf("schema %v failed to look up field with dbname %v", s, f.DBName)
				}
			}

			for _, name := range []string{f.DBName, f.Name} {
				if name != "" {
					if field := s.LookUpField(name); field == nil || (field.Name != name && field.DBName != name) {
						t.Errorf("schema %v failed to look up field with dbname %v", s, f.DBName)
					}
				}
			}

			if f.PrimaryKey {

	New(ctx context.Context, key string, isTransaction bool, connPool ConnPool, locker sync.Locker) (*Stmt, error)

	// Keys returns a slice of all cache keys in the store.
	Keys() []string

	// Get retrieves a Stmt object from the store based on the given key.
	// Parameters:
	//   key: The key used to look up the Stmt object.
	// Returns:
	//   *Stmt: The found Stmt object, or nil if not found.