Added default_scope to Base [#1381 state:committed] (Paweł Kondzior)

activerecord/CHANGELOG

+*2.3.0/3.0*
+
+* Added default_scope to Base #1381 [Paweł Kondzior]. Example:
+
+    class Person < ActiveRecord::Base
+      default_scope :order => 'last_name, first_name'
+    end
+    
+    class Company < ActiveRecord::Base
+      has_many :people
+    end
+    
+    Person.all             # => Person.find(:all, :order => 'last_name, first_name')
+    Company.find(1).people # => Person.find(:all, :order => 'last_name, first_name', :conditions => { :company_id => 1 })
+
+
 *2.2.1 [RC2] (November 14th, 2008)*
 
 * Ensure indices don't flip order in schema.rb #1266 [Jordi Bunster]

activerecord/lib/active_record/base.rb

@@ -2016,6 +2016,16 @@ def subclasses #:nodoc:
           @@subclasses[self] + extra = @@subclasses[self].inject([]) {|list, subclass| list + subclass.subclasses }
         end
 
+        # Sets the default options for the model. The format of the
+        # <tt>method_scoping</tt> argument is the same as in with_scope.
+        #
+        #   class Person << ActiveRecord::Base
+        #     default_scope :find => { :order => 'last_name, first_name' }
+        #   end
+        def default_scope(options = {})
+          self.scoped_methods << { :find => options, :create => options.is_a?(Hash) ?  options[:conditions] : {} }
+        end
+
         # Test whether the given method and optional key are scoped.
         def scoped?(method, key = nil) #:nodoc:
           if current_scoped_methods && (scope = current_scoped_methods[method])

activerecord/test/cases/method_scoping_test.rb

@@ -522,6 +522,44 @@ def test_nested_scope
 end
 
 
+class DefaultScopingTest < ActiveRecord::TestCase
+  fixtures :developers
+
+  def test_default_scope
+    expected = Developer.find(:all, :order => 'salary DESC').collect { |dev| dev.salary }
+    received = DeveloperOrderedBySalary.find(:all).collect { |dev| dev.salary }
+    assert_equal expected, received
+  end
+
+  def test_method_scope
+    expected = Developer.find(:all, :order => 'name DESC').collect { |dev| dev.salary }
+    received = DeveloperOrderedBySalary.all_ordered_by_name.collect { |dev| dev.salary }
+    assert_equal expected, received
+  end
+
+  def test_nested_scope
+    expected = Developer.find(:all, :order => 'name DESC').collect { |dev| dev.salary }
+    received = DeveloperOrderedBySalary.with_scope(:find => { :order => 'name DESC'}) do
+      DeveloperOrderedBySalary.find(:all).collect { |dev| dev.salary }
+    end
+    assert_equal expected, received
+  end
+
+  def test_nested_exclusive_scope
+    expected = Developer.find(:all, :limit => 100).collect { |dev| dev.salary }
+    received = DeveloperOrderedBySalary.with_exclusive_scope(:find => { :limit => 100 }) do
+      DeveloperOrderedBySalary.find(:all).collect { |dev| dev.salary }
+    end
+    assert_equal expected, received
+  end
+  
+  def test_overwriting_default_scope
+    expected = Developer.find(:all, :order => 'salary').collect { |dev| dev.salary }
+    received = DeveloperOrderedBySalary.find(:all, :order => 'salary').collect { |dev| dev.salary }
+    assert_equal expected, received
+  end
+end
+
 =begin
 # We disabled the scoping for has_one and belongs_to as we can't think of a proper use case
 

activerecord/test/models/developer.rb

@@ -77,3 +77,15 @@ def raise_if_projects_empty!
     raise if projects.empty?
   end
 end
+
+class DeveloperOrderedBySalary < ActiveRecord::Base
+    self.table_name = 'developers'
+    default_scope :order => "salary DESC" 
+    
+    def self.all_ordered_by_name
+      with_scope(:find => { :order => "name DESC" }) do
+        find(:all)
+      end
+    end
+
+end