Module: ActiveRecord::VirtualAttributes::VirtualReflections::ClassMethods

Defined in:
lib/active_record/virtual_attributes/virtual_reflections.rb

Instance Method Summary collapse

Instance Method Details

#collect_reflections(association_names) ⇒ Object

invalid associations return a nil real reflections are followed a virtual association will stop the traversal



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 71

def collect_reflections(association_names)
  klass = self
  association_names.each_with_object([]) do |name, ret|
    reflection = klass.reflect_on_association(name)
    if reflection.nil?
      if klass.reflection_with_virtual(name)
        break(ret)
      else
        break
      end
    end
    klass = reflection.klass
    ret << reflection
  end
end

#collect_reflections_with_virtual(association_names) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 87

def collect_reflections_with_virtual(association_names)
  klass = self
  association_names.collect do |name|
    reflection = klass.reflection_with_virtual(name) || break
    klass = reflection.klass
    reflection
  end
end

#follow_associations(association_names) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 59

def follow_associations(association_names)
  association_names.inject(self) { |klass, name| klass.try!(:reflect_on_association, name).try!(:klass) }
end

#follow_associations_with_virtual(association_names) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 63

def follow_associations_with_virtual(association_names)
  association_names.inject(self) { |klass, name| klass.try!(:reflection_with_virtual, name).try!(:klass) }
end

#reflection_with_virtual(association) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 55

def reflection_with_virtual(association)
  virtual_reflection(association) || reflect_on_association(association)
end

#reflections_with_virtual ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 51

def reflections_with_virtual
  reflections.symbolize_keys.merge(virtual_reflections)
end

#virtual_belongs_to(name, options = {}) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 29

def virtual_belongs_to(name, options = {})
  uses = options.delete(:uses)
  reflection = ActiveRecord::Associations::Builder::BelongsTo.build(self, name, nil, options)
  add_virtual_reflection(reflection, name, uses, options)
end

#virtual_has_many(name, options = {}) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 19

def virtual_has_many(name, options = {})
  define_method("#{name.to_s.singularize}_ids") do
    records = send(name)
    records.respond_to?(:ids) ? records.ids : records.collect(&:id)
  end
  uses = options.delete(:uses)
  reflection = ActiveRecord::Associations::Builder::HasMany.build(self, name, nil, options)
  add_virtual_reflection(reflection, name, uses, options)
end

#virtual_has_one(name, options = {}) ⇒ Object

Definition



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 13

def virtual_has_one(name, options = {})
  uses = options.delete(:uses)
  reflection = ActiveRecord::Associations::Builder::HasOne.build(self, name, nil, options)
  add_virtual_reflection(reflection, name, uses, options)
end

#virtual_reflection(name) ⇒ Object 



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 39

def virtual_reflection(name)
  virtual_reflections[name.to_sym]
end

#virtual_reflection?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 35

def virtual_reflection?(name)
  virtual_reflections.key?(name.to_sym)
end

#virtual_reflections ⇒ Object

Introspection



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# File 'lib/active_record/virtual_attributes/virtual_reflections.rb', line 47

def virtual_reflections
  (virtual_fields_base? ? {} : superclass.virtual_reflections).merge(_virtual_reflections)
end