paginate last 20 models, ruby on rails (will_paginate gem)

Question

I'm trying to do pagination using the will_paginate gem:

@books = Book.joins(:ads).last(20).page(params[:page]).per_page(10)

But I'm getting this error: undefined method `page' for #<\Array:0x007fc3ef37d308> and I can't seem to figure out what's wrong. Pagination works like a charm in other actions.

Thanks! :)

Answer 1

Don't use last as that will trigger the query execution. Use reverse_order and limit instead.

Book.joins(:ads).reverse_order.limit(20).page(params[:page]).per_page(10)

Answer 2

If you still want to paginate array:

require 'will_paginate/array'

and then use

Array#paginate

https://github.com/mislav/will_paginate/wiki/Backwards-incompatibility (the very bottom of the page)

sources:

https://github.com/mislav/will_paginate/blob/2-3-stable/lib/will_paginate/array.rb https://github.com/mislav/will_paginate/blob/master/lib/will_paginate/array.rb