Module: Something::ClassMethods

Defined in:
lib/hstore_attribute_support/snippets.rb

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.hstore_attributes ⇒ Object

Returns the value of attribute hstore_attributes.



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# File 'lib/hstore_attribute_support/snippets.rb', line 26

def hstore_attributes
  @hstore_attributes
end

Class Method Details

.hstore_attr_accessor(attribute_name, hstore_column, type = nil, default = nil) ⇒ Object

this class method allows descendant classes to set up attributes, which are stored in a hstore column. this solves two problems:

  1. by providing a cast hint, it will take care of the data type, which is lost by the hstore and was a pure string otherwise

  2. it provides an easy way of setting up defaults, as rails AR mechanisms fail here (no database defaults available for virtual attributes)



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# File 'lib/hstore_attribute_support/snippets.rb', line 69

def self.hstore_attr_accessor(attribute_name, hstore_column, type  = nil, default = nil)
  self.hstore_attributes ||= {}

  self.hstore_attributes[attribute_name.to_s] = {
    :column  => hstore_column.to_s,
    :type    => type,
    :default => default
  }

  class_eval %Q{
    def #{attribute_name}
      return read_hstore_attribute("#{attribute_name}")
    end

    def #{attribute_name}?
      return read_hstore_attribute("#{attribute_name}").present?
    end

    def #{attribute_name}=(value)
      return write_hstore_attribute("#{attribute_name}", value)
    end
  }
end