Overview
The Libro interface represents a book in the virtual library system. It includes book metadata and relationships to authors and genres.
Interface Definition
import { Autor } from './autor';
import { Genero } from './genero';
export interface Libro {
id: number;
titulo: string;
portada?: string;
anioPublicacion?: number;
disponible: boolean;
// Relaciones
genero: Genero;
autores: Autor[];
}
Properties
Basic Properties
Unique identifier for the book. Auto-generated by the backend.
Optional URL or path to the book’s cover image.
Optional publication year of the book.
Indicates whether the book is currently available for loan. true if available, false if currently loaned out.
Relationships
The genre/category to which this book belongs. See Genero interface. Array of authors who wrote this book. A book can have multiple authors. See Autor interface. Usage Examples
Fetching All Books
import { LibroService } from './core/services/libro';
import { Libro } from './core/models/libro';
this.libroService.getAll().subscribe({
next: (libros: Libro[]) => {
libros.forEach(libro => {
console.log(`${libro.titulo} by ${libro.autores.map(a => a.nombre).join(', ')}`);
console.log(`Genre: ${libro.genero.nombre}`);
console.log(`Available: ${libro.disponible ? 'Yes' : 'No'}`);
});
},
error: (err) => console.error('Error fetching books:', err)
});
Creating a New Book
const nuevoLibro = {
titulo: 'Cien años de soledad',
portada: 'https://ejemplo.com/portada.jpg',
anioPublicacion: 1967,
disponible: true,
genero: {
id: 1,
nombre: 'Realismo Mágico'
},
autores: [
{
id: 1,
nombre: 'Gabriel García Márquez',
urlFoto: 'https://ejemplo.com/gabo.jpg'
}
]
};
this.libroService.create(nuevoLibro).subscribe({
next: (libro: Libro) => {
console.log('Book created:', libro.id);
},
error: (err) => console.error('Error creating book:', err)
});
Updating a Book
this.libroService.getById(1).subscribe({
next: (libro: Libro) => {
// Update availability
const libroActualizado = {
...libro,
disponible: false
};
this.libroService.update(libro.id, libroActualizado).subscribe({
next: (updated) => console.log('Book updated'),
error: (err) => console.error('Update failed:', err)
});
}
});
Deleting a Book
this.libroService.delete(libroId).subscribe({
next: () => console.log('Book deleted successfully'),
error: (err) => console.error('Delete failed:', err)
});
Filtering Available Books
this.libroService.getAll().subscribe({
next: (libros: Libro[]) => {
const librosDisponibles = libros.filter(libro => libro.disponible);
console.log(`${librosDisponibles.length} books available for loan`);
}
});
- Autor - Book author interface
- Genero - Book genre interface
- Prestamo - Loan interface that references Libro
Notes
The disponible field is automatically updated by the backend when a loan is approved or a book is returned.
When creating or updating a book, ensure the genero and autores objects contain valid IDs that exist in the database.