Module: ActiveFedora::Model

Defined in:
lib/active_fedora/model.rb

Overview

ActiveFedora

This module mixes various methods into the including class, much in the way ActiveRecord does.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.classname_from_uri(uri) ⇒ Object

Takes a Fedora URI for a cModel and returns classname, namespace



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# File 'lib/active_fedora/model.rb', line 9

def self.classname_from_uri(uri)
  local_path = uri.split('/')[1]
  parts = local_path.split(':')
  return parts[-1].split(/_/).map(&:camelize).join('::'), parts[0]
end

.from_class_uri(uri) ⇒ Class, False

Takes a Fedora URI for a cModel, and returns a corresponding Model if available This method should reverse ClassMethods#to_class_uri

Returns:

  • (Class, False) —

    the class of the model or false, if it does not exist



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# File 'lib/active_fedora/model.rb', line 19

def self.from_class_uri(uri)
  model_value, pid_ns = classname_from_uri(uri)
  raise "model URI incorrectly formatted: #{uri}" unless model_value

  unless class_exists?(model_value)
    logger.warn "#{model_value} is not a real class"
    return false
  end
  if model_value.include?("::")
    result = eval(model_value)
  else
    result = Kernel.const_get(model_value)
  end
  unless result.nil?
    model_ns = (result.respond_to? :pid_namespace) ? result.pid_namespace : ContentModel::CMODEL_NAMESPACE
    if model_ns != pid_ns
      logger.warn "Model class namespace '#{model_ns}' does not match uri: '#{uri}'"
    end
  end
  result
end

Instance Method Details

#to_class_uri(attrs = {}) ⇒ Object

Returns a suitable uri object for :has_model Should reverse Model#from_class_uri



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# File 'lib/active_fedora/model.rb', line 43

def to_class_uri(attrs = {})
  unless self.respond_to? :pid_suffix
    pid_suffix = attrs.has_key?(:pid_suffix) ? attrs[:pid_suffix] : ContentModel::CMODEL_PID_SUFFIX
  else
    pid_suffix = self.pid_suffix
  end
  unless self.respond_to? :pid_namespace
    namespace = attrs.has_key?(:namespace) ? attrs[:namespace] : ContentModel::CMODEL_NAMESPACE   
  else
    namespace = self.pid_namespace
  end
  "info:fedora/#{namespace}:#{ContentModel.sanitized_class_name(self)}#{pid_suffix}" 
end