Tuesday, 19 January 2010

Fields_for, symbols and instance variables

Had a problem with fields_for and accepts_nested_attributes_for

The invoice class has many invoice items, but they have to be displayed in a certain order. Originally I had an @invoice_items variable - but the form wasn't looking at this.
However, a genius on teh Ruby forum posted the following:
@invoice = Invoice.find(params[:id], :include => :invoice_items, :order "invoice_items.display_order")

When the invoice calls the invoice_items they are already in the object and in the right place. Now he has pointed it out to me, I get what it is - but don't think I would have come up with that on my own.

No comments:

Post a Comment