class CmAdmin::Models::Field

def initialize(field_name, attributes = {})
  @field_name = field_name
  set_default_values
  attributes.each do |key, value|
    self.send("#{key.to_s}=", value)
  end
  self.height = 50 if self.field_type == :image && self.height.nil?
  self.width = 50 if self.field_type == :image && self.width.nil?
end