Contents

class DynamicAttribute < ActiveRecord::Base
  # TODO
  # Set table name from configuration
  belongs_to :attributable, :polymorphic => true

  def value
    send("#{object_type}_value")
  end

  def value=(v)
    object_type = self.class.attr_type?(v)

    # only allow object_type changes if this is NOT a new record
    # and it's text to string or vice versa
    interchangeable_types = %w(text string)
    #puts "#{attr_key} is currently a #{self.object_type}, and we wanna make it a #{object_type}"
    if !new_record? && interchangeable_types.include?(self.object_type) && interchangeable_types.include?(object_type) && self.object_type != object_type
      #puts "#{attr_key} is not new, and we're setting object_type to #{object_type}"
      self.object_type = object_type
      send "#{self.class.attr_column(v)}=", v
    elsif self.object_type == object_type # has to be the same kind of object
      send "#{self.object_type}_value=", v
    end
  end

  def self.attr_type?(v)
    object_type = if v.is_a?(Integer)
      "integer"
    elsif v.is_a?(Float)
      "float"
    elsif v.is_a?(TrueClass) || v.is_a?(FalseClass)
      "boolean"
    elsif v.is_a?(String)
      v.size < 255 ? "string" : "text"
    end
  end

  # Returns what column this kind of data should be in
  def self.attr_column(v)
    "#{self.attr_type?(v)}_value"
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
datts_right-0.0.10	lib/datts_right/dynamic_attribute.rb
datts_right-0.0.9	lib/datts_right/dynamic_attribute.rb