Add the has_many_polymorphs plugin

[cs356-p2-videostore.git] / vendor / plugins / has_many_polymorphs / lib / has_many_polymorphs / support_methods.rb

diff --git a/vendor/plugins/has_many_polymorphs/lib/has_many_polymorphs/support_methods.rb b/vendor/plugins/has_many_polymorphs/lib/has_many_polymorphs/support_methods.rb
new file mode 100644 (file)
index 0000000..89ca52a
--- /dev/null
+++ b/vendor/plugins/has_many_polymorphs/lib/has_many_polymorphs/support_methods.rb
@@ -0,0 +1,84 @@
+
+class String
+
+  # Changes an underscored string into a class reference.
+  def _as_class
+    # classify expects self to be plural
+    self.classify.constantize
+  end
+
+  # For compatibility with the Symbol extensions.
+  alias :_singularize :singularize
+  alias :_pluralize :pluralize
+  alias :_classify :classify
+end
+
+class Symbol
+  
+  # Changes an underscored symbol into a class reference.
+  def _as_class; self.to_s._as_class; end
+  
+  # Changes a plural symbol into a singular symbol.
+  def _singularize; self.to_s.singularize.to_sym; end
+
+  # Changes a singular symbol into a plural symbol.
+  def _pluralize; self.to_s.pluralize.to_sym; end
+
+  # Changes a symbol into a class name string.
+  def _classify; self.to_s.classify; end
+end
+
+class Array
+
+  # Flattens the first level of self.
+  def _flatten_once
+    self.inject([]){|r, el| r + Array(el)}
+  end
+
+  # Rails 1.2.3 compatibility method. Copied from http://dev.rubyonrails.org/browser/trunk/activesupport/lib/active_support/core_ext/array/extract_options.rb?rev=7217 
+  def _extract_options!
+    last.is_a?(::Hash) ? pop : {}
+  end
+end
+
+class Hash
+
+  # An implementation of select that returns a Hash.
+  def _select
+    Hash[*self.select do |key, value|
+      yield key, value
+    end._flatten_once]
+  end
+end
+
+class Object
+
+  # Returns the metaclass of self.
+  def _metaclass; (class << self; self; end); end
+
+  # Logger shortcut.
+  def _logger_debug s
+    s = "** has_many_polymorphs: #{s}"
+    RAILS_DEFAULT_LOGGER.debug(s) if RAILS_DEFAULT_LOGGER
+  end  
+
+  # Logger shortcut.  
+  def _logger_warn s
+    s = "** has_many_polymorphs: #{s}"
+    if RAILS_DEFAULT_LOGGER
+      RAILS_DEFAULT_LOGGER.warn(s) 
+    else
+      $stderr.puts(s)
+    end    
+  end
+  
+end
+
+class ActiveRecord::Base
+
+  # Return the base class name as a string.
+  def _base_class_name
+    self.class.base_class.name.to_s
+  end
+  
+end