Module: TestDummy::Support

Defined in:
lib/test_dummy/support.rb

Class Method Summary collapse

Class Method Details

.combine_attributes(*sets) ⇒ Object

Combines several sets of parameters together into a single set in order of lowest priority to highest priority. Supplied list can contain nil values which will be ignored. Returns a Hash with symbolized keys.



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# File 'lib/test_dummy/support.rb', line 5

def self.combine_attributes(*sets)
  combined_attributes = { }

  # Apply sets in order they are listed
  sets.compact.each do |set|
    set.each do |k, v|
      case (v)
      when nil
        # Ignore nil assignments
      else
        combined_attributes[k.to_sym] = v
      end
    end
  end

  combined_attributes
end

.reflection_properties(model_class, attribute) ⇒ Object

This method is used to provide a unified interface to the otherwise irregular methods to discover information on assocations. Rails 3 introduces a new method. Returns the reflected class and foreign key properties for a named attribute, or nil if no association could be found.



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# File 'lib/test_dummy/support.rb', line 27

def self.reflection_properties(model_class, attribute)
  if (model_class.respond_to?(:reflect_on_association) and reflection = model_class.reflect_on_association(attribute))
    [
      reflection.klass,
      (reflection.respond_to?(:foreign_key) ? reflection.foreign_key : reflection.primary_key_name).to_sym
    ]
  elsif (model_class.respond_to?(:association_reflection) and reflection = model_class.association_reflection(attribute))
    [
      reflection[:associated_class],
      (reflection[:key] || "#{attribute.to_s.underscore}_id").to_sym
    ]
  end
end