class Croesus::Validator::LambdaValidator

Author: Stefano Harding <riddopic@gmail.com>

Copyright © 2014 Stefano Harding

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Public Class Methods

new() click to toggle source
Calls superclass method Croesus::Validator::Base::new
# File lib/croesus/validators/lambda_validator.rb, line 21
def initialize
  super('_lambda')  # The name of the validator, underscored as it won't usually be directly invoked (invoked through use of validator)
end

Public Instance Methods

presence_error_message() click to toggle source
# File lib/croesus/validators/lambda_validator.rb, line 40
def presence_error_message
  'is not valid'
end
should_validate?(item) click to toggle source
# File lib/croesus/validators/lambda_validator.rb, line 25
def should_validate?(item)
  if item.is_a?(Proc)
    if item.arity == 1
      true
    else
      raise InvalidArgumentCount.new(
        "Lambda validator should only accept one argument; " \
        "supplied lambda accepts #{item.arity}."
      )
    end
  else
    false
  end
end
validate(key, value, lambda, errors) click to toggle source
# File lib/croesus/validators/lambda_validator.rb, line 44
def validate(key, value, lambda, errors)
  unless lambda.call(value)
    errors[key] = presence_error_message
  end

rescue
  errors[key] = presence_error_message
end