Module: Glue::Validation

Defined in:

lib/more/facets/validation.rb

Overview

Implements a meta-language for validating managed objects. Typically used in Validator objects but can be included in managed objects too.

Additional og-related validation macros can be found in lib/og/validation.

The following validation macros are available:

* validate_value
* validate_confirmation
* validate_format
* validate_length
* validate_inclusion

Og/Database specific validation methods are added in the file og/validation.rb

Example

class User

  attr_accessor :name, String 
  attr_accessor :level, Fixnum

  validate_length :name, :range => 2..6 
  validate_unique :name, :msg => :name_allready_exists 
  validate_format :name, :format => /[a-z]*/, :msg => 'invalid format', :on => :create 
end

class CustomUserValidator 
  include Validation
  validate_length :name, :range => 2..6, :msg_short => :name_too_short, :msg_long => :name_too_long 
end

user = @request.fill(User.new)
user.level = 15

unless user.valid?
  user.save
else
  p user.errors[:name]
end

unless user.save
  p user.errors.on(:name)
end

unless errors = CustomUserValidator.errors(user)
  user.save
else
  p errors[:name]
end

– TODO: all validation methods should imply validate_value. ++

Defined Under Namespace

Modules: ClassMethods Classes: Errors, Key

Instance Attribute Summary

• #errors ⇒ Object

  If the validate method returns true, this attributes holds the errors found.

Instance Method Summary

• #valid? ⇒ Boolean

  Call the #validate method for this object.

• #validate(on = :save) ⇒ Object

  Evaluate the class and see if it is valid.

Instance Attribute Details

#errors ⇒ Object

If the validate method returns true, this attributes holds the errors found.

# File 'lib/more/facets/validation.rb', line 150

def errors
  @errors
end

Instance Method Details

#valid? ⇒ Boolean

Call the #validate method for this object. If validation errors are found, sets the returns true.

Returns:

• (Boolean)

# File 'lib/more/facets/validation.rb', line 157

def valid?
  validate
  @errors.empty?
end

#validate(on = :save) ⇒ Object

Evaluate the class and see if it is valid. Can accept any parameter for ‘on’ event, and defaults to :save

# File 'lib/more/facets/validation.rb', line 166

def validate(on = :save)
  @errors = Errors.new

  return if self.class.validations.length == 0

  for event, block in self.class.validations
    block.call(self) if event == on.to_sym
  end
end