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JavaScript Practice Object Interaction Checking Out and Returning a Book Solution: A Better Way With Setter Methods

AJ Zhang
AJ Zhang
8,946 Points
Posted by AJ Zhang
AJ Zhang
8,946 Points

I'm having problem with setting Due Date: Can't figure out what I did wrong.

'''

class Patron {

constructor (name,email) { this.name = name; this.email = email; this.currentBook = null; }

checkOut(book) {
     this.currentBook = book; 
     book.out = true;
     book.patron=this;
}

returnBook(book) {
     this.currentBook = null;
     book.out = false;
     book.patron = null;
}

set out(out){
     this._out=out;

     if (_out) {
     const newDueDate = new Date();
     newDueDate.setDate (newDueDate.getDate()+14);
     this.dueDate = newDueDate;
    } else {
      this.dueDate = null;
    }
 }


get out(){
  return this._out;
}

} '''

4 Answers

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

When you test the backing variable, be sure to include the "this." prefix:

    if (this._out) {  // or just "if (out)" without underscore
AJ Zhang
AJ Zhang
8,946 Points
AJ Zhang
AJ Zhang
8,946 Points

I moved it to Book.js file and it worked.

AJ Zhang
AJ Zhang
8,946 Points
AJ Zhang
AJ Zhang
8,946 Points

Thanks for getting back to me so soon. I tried but still not working. Below is what the console returns. Why is _out remains false?

Patron {name: "AJ", email: "123@gmail.com", currentBook: Book} currentBook: Book author: "J.K. Rowling" dueDate: null isbn: "978-0439708180" out: true patron: Patron {name: "AJ", email: "123@gmail.com", currentBook: Book} title: "Harry Potter and the Sorcerer's Stone" out: false __proto_: Object email: "123@gmail.com" name: "AJ" out: undefined

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

I'm confused, is "out" a property of a patron, or a book?

Instructions for code formatting can be found in the Markdown Cheatsheet pop-up below the "Add an Answer" area. :arrow_heading_down:
Or watch this video on code formatting.

AJ Zhang
AJ Zhang
8,946 Points
AJ Zhang
AJ Zhang
8,946 Points

This is embarrassing. I put everything in Patron.js. I'm struggling a bit with this topic ... Thanks for your help!

Heidi Vasterling-Ford
Heidi Vasterling-Ford
7,806 Points
Heidi Vasterling-Ford
Heidi Vasterling-Ford
7,806 Points

AJ, I am having the same issue with the due date. I too have the setter and getter in the Patron.js file, where is it supposed to go?