Multiple instances of a single object in a Rails Array?

Question

G'day guys, trying to build a small invoicing system (that can generate PDF's using prawn), but am having an issue with generating multiples of indivdual items in the array. I have the Invoice class which has_many :items, but when I try to add a multiple of an item to the invoice, it won't actually add that to the invoice and it doesn't update the total.

Would I be better using a line_item model abstraction that has a has_one to the item but an integer that keeps the multiples of the item in the invoice?

Winfield · Accepted Answer · 2010-07-08 01:32:26Z

3

It sounds like you have a many-to-many relationship, an Item may be in many invoices (more than one time) and an Invoice has many items.

class Invoice < ActiveRecord::Base
  has_many :invoice_items
  has_many :items, :through => :invoice_items
end

class InvoiceItem < ActiveRecord::Base
  belongs_to :invoice
  belongs_to :item
end

answered Jul 8, 2010 at 1:32

Winfield

19.2k4 gold badges55 silver badges65 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Multiple instances of a single object in a Rails Array?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related