Search scopes

lib/administrate/search.rb

@@ -8,11 +8,20 @@ def initialize(resolver, term)
     def run
       if @term.blank?
         resource_class.all
+      elsif (@scope = search_scope)
+        resource_class.send @scope
       else
         resource_class.where(query, *search_terms)
       end
     end
 
+    def search_scope
+      if (@term[-1, 1] == ':')
+        possible_scope = @term[0..-2]
+        possible_scope if resource_class.respond_to?(possible_scope)
+      end
+    end
+
     private
 
     delegate :resource_class, to: :resolver

spec/example_app/app/models/customer.rb

@@ -4,6 +4,8 @@ class Customer < ActiveRecord::Base
   validates :name, presence: true
   validates :email, presence: true
 
+  scope :subscribed, -> { where(email_subscriber: true) }
+
   def lifetime_value
     orders.map(&:total_price).reduce(0, :+)
   end

spec/features/search_spec.rb

@@ -30,4 +30,17 @@
     expect(page).to have_content(email_match.email)
     expect(page).not_to have_content(mismatch.email)
   end
+
+  scenario "admin searches using a model scope", :js do
+    query = "subscribed:"
+    subscribed_customer = create(:customer, name: "Dan Croak", email_subscriber: true)
+    other_customer = create(:customer, name: "Foo Bar", email_subscriber: false)
+
+    visit admin_customers_path
+    fill_in :search, with: query
+    page.execute_script("$('.search').submit()")
+
+    expect(page).to have_content(subscribed_customer.name)
+    expect(page).not_to have_content(other_customer.name)
+  end
 end