Class: HasInherited::InheritAccessor

Inherits:
Object
  • Object
show all
Defined in:
lib/has_inherited.rb

Overview

ClassMethods

Instance Method Summary collapse

Constructor Details

#initialize(owner, assoc, heritage) ⇒ InheritAccessor

Returns a new instance of InheritAccessor.



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# File 'lib/has_inherited.rb', line 41

def initialize(owner, assoc, heritage)
  @owner = owner
  @assoc = @owner.send(assoc)
  if heritage.kind_of? Array
    @parent = heritage.first
    @parent_accessor = heritage.second
  else
    @parent = heritage
  end

  if @parent && @parent_accessor.nil?
    if @parent.kind_of? Class
      @parent_accessor = :global
    else
      @parent_accessor = :inheritable
    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(symbol, *args) ⇒ Object (private) 



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# File 'lib/has_inherited.rb', line 119

def method_missing(symbol, *args)
  name = symbol.to_s
  if name =~ /=$/
    self[name.gsub(/=$/, '')] = args.first
  elsif name =~ /\?$/
    !!self[name.gsub /\?$/, '']
  else
    self[name]
  end
end

Instance Method Details

#[](attribute) ⇒ Object 



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# File 'lib/has_inherited.rb', line 60

def [](attribute)
  attr_value = find_attr(attribute).try(:value)
  if attr_value.nil? && has_parent?
    return parent.__send__(:[], attribute)
  else
    return attr_value
  end
end

#[]=(attribute, value) ⇒ Object 



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# File 'lib/has_inherited.rb', line 69

def []=(attribute, value)
  attr = find_attr(attribute)
  if value.nil?
    attr.delete if attribute
  else
    if attr.nil?
      if @owner.respond_to?(:new_record?) && @owner.new_record?
        attr = @assoc.build(:name => attribute.to_s, :value => value)
      else
        attr = @assoc.create(:name => attribute.to_s, :value => value)
      end
    else
      attr.update_attributes(:value => value)
    end
  end
end

#all(inherited = true) ⇒ Object 



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# File 'lib/has_inherited.rb', line 86

def all(inherited = true)
  all_values = {}
  @assoc.all.each {|ina| all_values[ina.name.to_sym] = ina.value}
  if inherited
    parent_proxy = parent
    while parent_proxy
      parent_proxy_hash = parent_proxy.__send__(:all, false)
      all_values.reverse_merge! parent_proxy_hash
      parent_proxy = parent_proxy.__send__(:parent)
    end
  end
  all_values
end