Class: DataMapper::Validations::FormatValidator

Inherits:
GenericValidator show all
Includes:
Helpers::Email
Defined in:
lib/data_mapper/validations/format_validator.rb

Defined Under Namespace

Classes: UnknownValidationFormat

Constant Summary collapse

ERROR_MESSAGES = 
{
  :invalid => '#{field} is invalid',
  :invalid_email => '#{value} is not a valid email address'
}
FORMATS = 
{
  :email_address => [lambda { |email_address| email_address =~ DataMapper::Validations::Helpers::Email::RFC2822::EmailAddress }, :invalid_email]
}

Instance Method Summary collapse

Methods inherited from GenericValidator

#add_error, #validation_error_message

Constructor Details

#initialize(field_name, options = {}, &b) ⇒ FormatValidator

Returns a new instance of FormatValidator.



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# File 'lib/data_mapper/validations/format_validator.rb', line 21

def initialize(field_name, options = {}, &b)
  @field_name, @options = field_name, options
end

Instance Method Details

#call(target) ⇒ Object 



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# File 'lib/data_mapper/validations/format_validator.rb', line 25

def call(target)
  field_value = target.instance_variable_get("@#{@field_name}")
  return true if @options[:allow_nil] && field_value.nil?
  
  validation = (@options[:as] || @options[:with])
  message_key = :invalid
  
  # Figure out what to use as the actual validator.  If a symbol is passed to :as, look up
  # the canned validation in FORMATS.
  validator = if validation.is_a? Symbol
    if FORMATS[validation].is_a? Array
      message_key = FORMATS[validation][1] || :invalid
      FORMATS[validation][0]
    else
      FORMATS[validation] || validation
    end
  else
    validation
  end
  
  valid = case validator
  when Proc then validator.call(field_value)
  when Regexp then validator =~ field_value
  else raise UnknownValidationFormat, "Can't determine how to validate #{target.class}##{@field_name} with #{validator.inspect}"
  end 
  
  unless valid
    field = Inflector.humanize(@field_name)
    value = target.instance_variable_get("@#{@field_name}")
    
    error_message = validation_error_message(ERROR_MESSAGES[message_key], nil, binding)        
    add_error(target, error_message , @field_name)
  end
  
  return valid
end