is latest a method ?

[PC Leung]

according to the book 'Agile web dev.." page 125

I am using rails 4.0 and hit the following error.

Is latest a method or not?

Thanks

undefined method `latest' for #<Class:0x007fca86206d88>

Extracted source (around line #7):

4 5 6 7 8 9 10

<h1>Your Pragmatic Catalog</h1> <% cache ['store', Product.latest] do %> <% @products.each do |product| %> <% cache ['entry', product] do %> <div class="entry">

[Matthew Rudy Jacobs]

I don't have a copy of the book,

but you should probably just say `Product.last`.

The idea is to cache the products so that it gets expired when products change.

So actually Product.lastest could be defined

def Product.latest

  Product.order("updated_at DESC").first

end

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[Dustin]

You know what Russian doll caching is, but Model.latest trips you up. Search either resource:

http://api.rubyonrails.org/

And

http://www.ruby-doc.org/core-2.0.0/

[Steve Holmes]

Yup

PC, look at page 118 in the PDF (or printed page 104)

That method should be defined in your product model.

[Graham Milosevic]

I'm not sure what's on page 104, but it could be a scope instead of a method which is what I would have done.

Graham Milosevic

Phone: 6770-8171

gra...@dentedtriangle.com

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[PC Leung]

thanks everybody. I find it.

config.action_controller.perform_caching = true

def self.latest 

  Product.order(:updated_at).last

end