Module: SimpleHstoreAccessor

Defined in:
lib/simple_hstore_accessor.rb,
lib/simple_hstore_accessor/version.rb

Constant Summary collapse

VERSION = 
'0.3.1'

Instance Method Summary collapse

Instance Method Details

#store_accessor(hstore_attribute, *keys) ⇒ Object

Public: Rails4-like method which defines simple accessors for hstore fields

hstore_attribute - your Hstore column keys - Array of fields in your hstore

Example

class Person < ActiveRecord::Base
  store_accessor :favorites_info, :book, :color
end

Returns nothing



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# File 'lib/simple_hstore_accessor.rb', line 19

def store_accessor(hstore_attribute, *keys)
  unless serialized_attributes.key?(hstore_attribute.to_s)
    if defined?(ActiveRecord::Coders::Hstore)
      serialize hstore_attribute, ActiveRecord::Coders::Hstore
    end
  end

  accessor_keys = Array(keys).flatten.map(&:to_sym)

  accessor_keys.each do |key|
    define_method("#{key}=") do |value|
      send("#{hstore_attribute}_will_change!")
      send("#{hstore_attribute}=", (send(hstore_attribute) || {}).merge(key.to_s => value))
    end
    define_method(key) do
      send(hstore_attribute) && send(hstore_attribute)[key.to_s]
    end
    define_method("#{key}_will_change!") { attribute_will_change!(key.to_s) }
    define_method("#{key}_changed?") { attribute_changed?(key.to_s) }
  end

  define_method :write_attribute do |attr_name, value|
    if accessor_keys.include?(attr_name.to_sym)
      public_send("#{attr_name}=", value)
    else
      super(attr_name, value)
    end
  end

  define_method :read_attribute do |attr_name|
    if accessor_keys.include?(attr_name.to_sym)
      public_send(attr_name)
    else
      super(attr_name)
    end
  end

  define_method("#{hstore_attribute}=") do |new_properties|
    current_properties = send(hstore_attribute) || {}

    (current_properties.keys | new_properties.keys).each do |key|
      next if current_properties[key].to_s == new_properties[key].to_s || !respond_to?("#{key}_will_change!")
      send("#{key}_will_change!")
    end

    super(new_properties)
  end
end