Question

I have two Models here associated as such:

class Order < ActiveRecord::Base
  belongs_to :customer
  ...
end

class Customer < ActiveRecord::Base
  has_many :orders
end

A customer can have many orders and an order can belong to one customer. The thing is that I’m displaying a listed table where I show the following field values

ORDER ID| CUSTOMER NAME |...

Customer name refers to customer[:name] – I found out that you can sort by using the find method and passing in a join like so:

Order.find(:all, :joins => :customer, :order => 'customer.name asc')

however I need to paginate the results here and it seems I can’t do something like this – I’m using the Kaminari gem here for pagination:

Order.find(:all, :joins => :customer, :order => 'customer.name asc').page(5) 
# doesn't work throws an error nomethoderror on page

Any ideas?

Answer 1

You should use the “new” Rails 3 query interface:

Order.joins(:customer).order("customers.name asc").page(5)