1 files changed, 25 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index a925ba6e20..556f9f115b 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -415,6 +415,31 @@ module ActiveRecord #:nodoc:
 
     @@subclasses = {}
 
+    # Contains the database configuration - as is typically stored in config/database.yml -
+    # as a Hash.
+    #
+    # For example, the following database.yml...
+    # 
+    #   development:
+    #     adapter: sqlite3
+    #     database: db/development.sqlite3
+    #   
+    #   production:
+    #     adapter: sqlite3
+    #     database: db/production.sqlite3
+    #
+    # ...would result in ActiveRecord::Base.configurations to look like this:
+    #
+    #   {
+    #      'development' => {
+    #         'adapter'  => 'sqlite3',
+    #         'database' => 'db/development.sqlite3'
+    #      },
+    #      'production' => {
+    #         'adapter'  => 'sqlite3',
+    #         'database' => 'db/production.sqlite3'
+    #      }
+    #   }
     cattr_accessor :configurations, :instance_writer => false
     @@configurations = {}