1 files changed, 102 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/associations/has_many_association.rb b/activerecord/lib/active_record/associations/has_many_association.rb
new file mode 100644
index 0000000000..947862ad37
--- /dev/null
+++ b/activerecord/lib/active_record/associations/has_many_association.rb
@@ -0,0 +1,102 @@
+module ActiveRecord
+  module Associations
+    class HasManyAssociation < AssociationCollection #:nodoc:
+      def initialize(owner, association_name, association_class_name, association_class_primary_key_name, options)
+        super(owner, association_name, association_class_name, association_class_primary_key_name, options)
+        @conditions = @association_class.send(:sanitize_conditions, options[:conditions])
+
+        if options[:finder_sql]
+          @finder_sql = interpolate_sql(options[:finder_sql])
+          @counter_sql = @finder_sql.gsub(/SELECT (.*) FROM/i, "SELECT COUNT(*) FROM")
+        else
+          @finder_sql = "#{@association_class_primary_key_name} = '#{@owner.id}' #{@conditions ? " AND " + interpolate_sql(@conditions) : ""}"   
+          @counter_sql = "#{@association_class_primary_key_name} = '#{@owner.id}'#{@conditions ? " AND " + interpolate_sql(@conditions) : ""}"
+        end
+      end
+
+      def create(attributes = {})
+        # Can't use Base.create since the foreign key may be a protected attribute.
+        record = build(attributes)
+        record.save
+        @collection << record if loaded?
+        record
+      end
+
+      def build(attributes = {})
+        record = @association_class.new(attributes)
+        record[@association_class_primary_key_name] = @owner.id
+        record
+      end
+
+      def find_all(runtime_conditions = nil, orderings = nil, limit = nil, joins = nil, &block)
+        if block_given? || @options[:finder_sql]
+          load_collection
+          @collection.find_all(&block)
+        else
+          @association_class.find_all(
+            "#{@association_class_primary_key_name} = '#{@owner.id}' " +
+            "#{@conditions ? " AND " + @conditions : ""} #{runtime_conditions ? " AND " + @association_class.send(:sanitize_conditions, runtime_conditions) : ""}",
+            orderings, 
+            limit, 
+            joins
+          )
+        end
+      end
+
+      def find(association_id = nil, &block)
+        if block_given? || @options[:finder_sql]
+          load_collection
+          @collection.find(&block)
+        else
+          @association_class.find_on_conditions(association_id,
+            "#{@association_class_primary_key_name} = '#{@owner.id}' #{@conditions ? " AND " + @conditions : ""}"
+          )
+        end
+      end
+
+      # Removes all records from this association.  Returns +self+ so
+      # method calls may be chained.
+      def clear
+        @association_class.update_all("#{@association_class_primary_key_name} = NULL", "#{@association_class_primary_key_name} = '#{@owner.id}'")
+        @collection = []
+        self
+      end
+
+      protected
+        def find_all_records
+          if @options[:finder_sql]
+            @association_class.find_by_sql(@finder_sql)
+          else
+            @association_class.find_all(@finder_sql, @options[:order] ? @options[:order] : nil)
+          end
+        end
+        
+        def count_records
+          if has_cached_counter?
+            @owner.send(:read_attribute, cached_counter_attribute_name)
+          elsif @options[:finder_sql]
+            @association_class.count_by_sql(@counter_sql)
+          else
+            @association_class.count(@counter_sql)
+          end
+        end
+        
+        def has_cached_counter?
+          @owner.attribute_present?(cached_counter_attribute_name)
+        end
+        
+        def cached_counter_attribute_name
+          "#{@association_name}_count"
+        end
+
+        def insert_record(record)
+          record.update_attribute(@association_class_primary_key_name, @owner.id)
+        end
+
+        def delete_records(records)
+          ids = quoted_record_ids(records)
+          @association_class.update_all("#{@association_class_primary_key_name} = NULL", "#{@association_class_primary_key_name} = '#{@owner.id}' AND #{@association_class.primary_key} IN (#{ids})")
+        end
+    end
+  end
+end