Froze rails gems

[depot.git] / vendor / rails / activerecord / lib / active_record / associations / has_one_association.rb

diff --git a/vendor/rails/activerecord/lib/active_record/associations/has_one_association.rb b/vendor/rails/activerecord/lib/active_record/associations/has_one_association.rb
new file mode 100644 (file)
index 0000000..9603230
--- /dev/null
+++ b/vendor/rails/activerecord/lib/active_record/associations/has_one_association.rb
@@ -0,0 +1,115 @@
+module ActiveRecord
+  module Associations
+    class HasOneAssociation < BelongsToAssociation #:nodoc:
+      def initialize(owner, reflection)
+        super
+        construct_sql
+      end
+
+      def create(attrs = {}, replace_existing = true)
+        new_record(replace_existing) do |reflection|
+          reflection.create_association(attrs)
+        end
+      end
+
+      def create!(attrs = {}, replace_existing = true)
+        new_record(replace_existing) do |reflection|
+          reflection.create_association!(attrs)
+        end
+      end
+
+      def build(attrs = {}, replace_existing = true)
+        new_record(replace_existing) do |reflection|
+          reflection.build_association(attrs)
+        end
+      end
+
+      def replace(obj, dont_save = false)
+        load_target
+
+        unless @target.nil? || @target == obj
+          if dependent? && !dont_save
+            @target.destroy unless @target.new_record?
+            @owner.clear_association_cache
+          else
+            @target[@reflection.primary_key_name] = nil
+            @target.save unless @owner.new_record? || @target.new_record?
+          end
+        end
+
+        if obj.nil?
+          @target = nil
+        else
+          raise_on_type_mismatch(obj)
+          set_belongs_to_association_for(obj)
+          @target = (AssociationProxy === obj ? obj.target : obj)
+        end
+
+        @loaded = true
+
+        unless @owner.new_record? or obj.nil? or dont_save
+          return (obj.save ? self : false)
+        else
+          return (obj.nil? ? nil : self)
+        end
+      end
+
+      protected
+        def owner_quoted_id
+          if @reflection.options[:primary_key]
+            @owner.class.quote_value(@owner.send(@reflection.options[:primary_key]))
+          else
+            @owner.quoted_id
+          end
+        end
+
+      private
+        def find_target
+          @reflection.klass.find(:first, 
+            :conditions => @finder_sql,
+            :select     => @reflection.options[:select],
+            :order      => @reflection.options[:order], 
+            :include    => @reflection.options[:include],
+            :readonly   => @reflection.options[:readonly]
+          )
+        end
+
+        def construct_sql
+          case
+            when @reflection.options[:as]
+              @finder_sql = 
+                "#{@reflection.quoted_table_name}.#{@reflection.options[:as]}_id = #{owner_quoted_id} AND " +
+                "#{@reflection.quoted_table_name}.#{@reflection.options[:as]}_type = #{@owner.class.quote_value(@owner.class.base_class.name.to_s)}"
+            else
+              @finder_sql = "#{@reflection.quoted_table_name}.#{@reflection.primary_key_name} = #{owner_quoted_id}"
+          end
+          @finder_sql << " AND (#{conditions})" if conditions
+        end
+        
+        def construct_scope
+          create_scoping = {}
+          set_belongs_to_association_for(create_scoping)
+          { :create => create_scoping }
+        end
+
+        def new_record(replace_existing)
+          # Make sure we load the target first, if we plan on replacing the existing
+          # instance. Otherwise, if the target has not previously been loaded
+          # elsewhere, the instance we create will get orphaned.
+          load_target if replace_existing
+          record = @reflection.klass.send(:with_scope, :create => construct_scope[:create]) do
+            yield @reflection
+          end
+
+          if replace_existing
+            replace(record, true) 
+          else
+            record[@reflection.primary_key_name] = @owner.id unless @owner.new_record?
+            self.target = record
+          end
+
+          record
+        end
+    end
+  end
+end