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products = Product.where("price = 100").limit(5) # No query executed yet
products = products.order("created_at DESC") # Adding to the query, still no execution
products.each { |product| puts product.price } # That's when the SQL query is actually fired
class Product < ActiveRecord::Base
named_scope :pricey, where("price > 100")
named_scope :latest, order("created_at DESC").limit(10)
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