Module: NForm::Validations

Included in:
Form
Defined in:
lib/nform/validations.rb

Overview

A Module of simple validation methods. Including objects are required to implement a simple API:

  1. Keys passed in to a validation must match instance method names

  2. Objects must provide an errors object which responds to []

When called, validators will return true/false indicating whether the validation passed or failed

Instance Method Summary collapse

Instance Method Details

#errors ⇒ Object 



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# File 'lib/nform/validations.rb', line 10

def errors
  @errors ||= {}
end

#validate_confirmation_of(attribute) ⇒ Object 



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# File 'lib/nform/validations.rb', line 49

def validate_confirmation_of(attribute)
  confirm_key = attribute.to_s.concat("_confirmation").to_sym
  if !respond_to?(confirm_key)
    errors[attribute] = "#{attribute.to_s.humanize} requires confirmation"
    false
  elsif send(attribute) != send(confirm_key)
    errors[confirm_key] = "#{attribute.to_s.humanize} confirmation does not match"
    false
  else
    true
  end
end

#validate_length_of(key, length) ⇒ Object 



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# File 'lib/nform/validations.rb', line 39

def validate_length_of(key,length)
  val = send(key)
  if val && val.respond_to?(:length) && val.length >= length
    true
  else
    errors[key] = "#{key.to_s.humanize} must be at least #{length} characters long"
    false
  end
end

#validate_numericality_of(*keys) ⇒ Object 



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# File 'lib/nform/validations.rb', line 25

def validate_numericality_of(*keys)
  pass = true
  keys.each do |key|
    val = send(key)
    return true if val.is_a?(Numeric)
    unless (val.respond_to?(:to_i) || val.respond_to?(:to_f)) &&
       (val == val.to_i.to_s || val == val.to_f.to_s)
      errors[key] = "#{key.to_s.humanize} must be a number"
      pass = false
    end
  end
  pass
end

#validate_presence_of(*keys) ⇒ Object 



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# File 'lib/nform/validations.rb', line 14

def validate_presence_of(*keys)
  pass = true
  keys.each do |key|
    unless respond_to?(key) && send(key) && send(key) != ""
      errors[key] = "#{key.to_s.humanize} is required"
      pass = false
    end
  end
  pass
end