I am using this named_scope to search for products that have a description matching any word the user inputs.

E.g., Product.description_like_any("choc pret")

Will return products with names like

• "Chocolate Bar"
• "Chocolate Covered Pretzels"
• "Miniature Chocolate Ponies"

Here's the named_scope I've written (which works)

named_scope :description_like_any, (lambda do |query|
  return {} unless query
  conditions = []
  values = []
  for q in query.split(/\s+/)
    conditions << "(`products`.description LIKE ?)"
    values << "%#{q}%"
  end
  { :conditions => [conditions.join(' AND '), *values] }
end)

Is there a better way to write this? Perhaps I'm missing a Rubyism/Railism or two?

Solution

Using scope_procedure in conjunction with Searchlogic, this can be done in an even easier way. Note, the solution before even leverages Searchlogic's _or_ syntax for connecting two scopes together. The :keywords 开发者_StackOverflowscope_procedure finds products matching product.description, or product.vendor.name; All with one text field!

Model

# app/models/product.rb
class Product < ActiveRecord::Base
  scope_procedure :keywords, lambda |query|
    description_like_any_or_vendor_name_like_any(query.split(/\s+/))
  end
end

Controller

# app/controllers/products_controller.rb
class ProductsController < ApplicationController
  def index
    @search = Product.search(params[:search])
    @products = @search.all
  end
end

Views

# app/views/products/index.html.erb
<% form_for @search do |f| %>
  <%= f.label :keywords, "Quick Search" %>
  <%= f.input :keywords %>
  <%= f.submit, "Go" %>
<% end %>

The most Railsy thing to do is to not write this yourself. :-) Use the excellent Searchlogic gem which will create the description_like_any scope for you.

Edit: If you want your user to be able to enter search terms in a free text field like this, you can define your own scope:

class Product < ActiveRecord::Base
   # ...
   scope_procedure :description_like_any_term, lambda { |terms| 
     name_like_any(terms.split(/\s+/))
   }
   # ...
end