module ActiveRecord::Core::ClassMethods

Public Instance Methods

===(object) click to toggle source

Overwrite the default class equality method to provide support for association proxies.

# File lib/active_record/core.rb, line 125
def ===(object)
  object.is_a?(self)
end
arel_engine() click to toggle source

Returns the Arel engine.

# File lib/active_record/core.rb, line 139
def arel_engine
  @arel_engine ||= begin
    if Base == self || connection_handler.retrieve_connection_pool(self)
      self
    else
      superclass.arel_engine
    end
  end
end
arel_table() click to toggle source

Returns an instance of Arel::Table loaded with the current table name.

class Post < ActiveRecord::Base
  scope :published_and_commented, published.and(self.arel_table[:comments_count].gt(0))
end
# File lib/active_record/core.rb, line 134
def arel_table
  @arel_table ||= Arel::Table.new(table_name, arel_engine)
end
generated_feature_methods() click to toggle source
# File lib/active_record/core.rb, line 100
def generated_feature_methods
  @generated_feature_methods ||= begin
    mod = const_set(:GeneratedFeatureMethods, Module.new)
    include mod
    mod
  end
end
initialize_generated_modules() click to toggle source
Calls superclass method
# File lib/active_record/core.rb, line 94
def initialize_generated_modules
  super

  generated_feature_methods
end
inspect() click to toggle source

Returns a string like 'Post(id:integer, title:string, body:text)'

Calls superclass method
# File lib/active_record/core.rb, line 109
def inspect
  if self == Base
    super
  elsif abstract_class?
    "#{super}(abstract)"
  elsif !connected?
    "#{super}(no database connection)"
  elsif table_exists?
    attr_list = columns.map { |c| "#{c.name}: #{c.type}" } * ', '
    "#{super}(#{attr_list})"
  else
    "#{super}(Table doesn't exist)"
  end
end