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Started added a validation mixin

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Usage:
  class Invoice < CouchRest::ExtendedDocument
    include CouchRest::Validation

    property :client_name
    property :employee_name
    property :location

    # Validation
    validates_present :client_name, :employee_name
    validates_present :location, :message => "Hey stupid!, you forgot the location"

  end
This commit is contained in:
Matt Aimonetti 2009-02-02 19:21:32 -08:00
parent 475e970c26
commit dfdcd79a58
17 changed files with 1391 additions and 4 deletions
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75
lib/couchrest/validation/validators/absent_field_validator.rb Normal file
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# Extracted from dm-validations 0.9.10
#
# Copyright (c) 2007 Guy van den Berg
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
module CouchRest
module Validation
##
#
# @author Guy van den Berg
class AbsentFieldValidator < GenericValidator
def initialize(field_name, options={})
super
@field_name, @options = field_name, options
end
def call(target)
value = target.send(field_name)
return true if (value.nil? || (value.respond_to?(:empty?) && value.empty?))
error_message = @options[:message] || ValidationErrors.default_error_message(:absent, field_name)
add_error(target, error_message, field_name)
return false
end
end # class AbsentFieldValidator
module ValidatesAbsent
##
#
# @example [Usage]
# require 'dm-validations'
#
# class Page
#
# property :unwanted_attribute, String
# property :another_unwanted, String
# property :yet_again, String
#
# validates_absent :unwanted_attribute
# validates_absent :another_unwanted, :yet_again
#
# # a call to valid? will return false unless
# # all three attributes are blank
# end
#
def validates_absent(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, CouchRest::Validation::AbsentFieldValidator)
end
end # module ValidatesAbsent
end # module Validation
end # module CouchRest

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# Extracted from dm-validations 0.9.10
#
# Copyright (c) 2007 Guy van den Berg
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
require 'pathname'
require Pathname(__FILE__).dirname.expand_path + 'formats/email'
require Pathname(__FILE__).dirname.expand_path + 'formats/url'
module CouchRest
module Validation
##
#
# @author Guy van den Berg
# @since 0.9
class FormatValidator < GenericValidator
FORMATS = {}
include CouchRest::Validation::Format::Email
include CouchRest::Validation::Format::Url
def initialize(field_name, options = {}, &b)
super(field_name, options)
@field_name, @options = field_name, options
@options[:allow_nil] = false unless @options.has_key?(:allow_nil)
end
def call(target)
value = target.validation_property_value(field_name)
return true if @options[:allow_nil] && value.nil?
validation = @options[:as] || @options[:with]
raise "No such predefined format '#{validation}'" if validation.is_a?(Symbol) && !FORMATS.has_key?(validation)
validator = validation.is_a?(Symbol) ? FORMATS[validation][0] : validation
valid = case validator
when Proc then validator.call(value)
when Regexp then value =~ validator
else
raise UnknownValidationFormat, "Can't determine how to validate #{target.class}##{field_name} with #{validator.inspect}"
end
return true if valid
error_message = @options[:message] || ValidationErrors.default_error_message(:invalid, field_name)
field = Extlib::Inflection.humanize(field_name)
error_message = error_message.call(field, value) if error_message.respond_to?(:call)
add_error(target, error_message, field_name)
false
end
#class UnknownValidationFormat < StandardError; end
end # class FormatValidator
module ValidatesFormat
##
# Validates that the attribute is in the specified format. You may use the
# :as (or :with, it's an alias) option to specify the pre-defined format
# that you want to validate against. You may also specify your own format
# via a Proc or Regexp passed to the the :as or :with options.
#
# @option :allow_nil<Boolean> true/false (default is true)
# @option :as<Format, Proc, Regexp> the pre-defined format, Proc or Regexp to validate against
# @option :with<Format, Proc, Regexp> an alias for :as
#
# @details [Pre-defined Formats]
# :email_address (format is specified in DataMapper::Validation::Format::Email)
# :url (format is specified in DataMapper::Validation::Format::Url)
#
# @example [Usage]
#
# class Page
#
# property :email, String
# property :zip_code, String
#
# validates_format :email, :as => :email_address
# validates_format :zip_code, :with => /^\d{5}$/
#
# # a call to valid? will return false unless:
# # email is formatted like an email address
# # and
# # zip_code is a string of 5 digits
#
def validates_format(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, CouchRest::Validation::FormatValidator)
end
end # module ValidatesFormat
end # module Validation
end # module CouchRest

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# encoding: binary
# Extracted from dm-validations 0.9.10
#
# Copyright (c) 2007 Guy van den Berg
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
module CouchRest
module Validation
module Format
module Email
def self.included(base)
CouchRest::Validation::FormatValidator::FORMATS.merge!(
:email_address => [ EmailAddress, lambda { |field, value| '%s is not a valid email address'.t(value) }]
)
end
# RFC2822 (No attribution reference available)
EmailAddress = begin
alpha = "a-zA-Z"
digit = "0-9"
atext = "[#{alpha}#{digit}\!\#\$\%\&\'\*+\/\=\?\^\_\`\{\|\}\~\-]"
dot_atom_text = "#{atext}+([.]#{atext}*)*"
dot_atom = "#{dot_atom_text}"
qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]'
text = "[\\x01-\\x09\\x11\\x12\\x14-\\x7f]"
quoted_pair = "(\\x5c#{text})"
qcontent = "(?:#{qtext}|#{quoted_pair})"
quoted_string = "[\"]#{qcontent}+[\"]"
atom = "#{atext}+"
word = "(?:#{atom}|#{quoted_string})"
obs_local_part = "#{word}([.]#{word})*"
local_part = "(?:#{dot_atom}|#{quoted_string}|#{obs_local_part})"
no_ws_ctl = "\\x01-\\x08\\x11\\x12\\x14-\\x1f\\x7f"
dtext = "[#{no_ws_ctl}\\x21-\\x5a\\x5e-\\x7e]"
dcontent = "(?:#{dtext}|#{quoted_pair})"
domain_literal = "\\[#{dcontent}+\\]"
obs_domain = "#{atom}([.]#{atom})*"
domain = "(?:#{dot_atom}|#{domain_literal}|#{obs_domain})"
addr_spec = "#{local_part}\@#{domain}"
pattern = /^#{addr_spec}$/
end
end # module Email
end # module Format
end # module Validation
end # module CouchRest

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# Extracted from dm-validations 0.9.10
#
# Copyright (c) 2007 Guy van den Berg
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
module CouchRest
module Validation
module Format
module Url
def self.included(base)
CouchRest::Validation::FormatValidator::FORMATS.merge!(
:url => [ Url, lambda { |field, value| '%s is not a valid URL'.t(value) }]
)
end
Url = begin
# Regex from http://www.igvita.com/2006/09/07/validating-url-in-ruby-on-rails/
/(^$)|(^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$)/ix
end
end # module Url
end # module Format
end # module Validation
end # module CouchRest

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# -*- coding: utf-8 -*-
# Extracted from dm-validations 0.9.10
#
# Copyright (c) 2007 Guy van den Berg
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
module CouchRest
module Validation
# All validators extend this base class. Validators must:
#
# * Implement the initialize method to capture its parameters, also calling
# super to have this parent class capture the optional, general :if and
# :unless parameters.
# * Implement the call method, returning true or false. The call method
# provides the validation logic.
#
# @author Guy van den Berg
class GenericValidator
attr_accessor :if_clause, :unless_clause
attr_reader :field_name
# Construct a validator. Capture the :if and :unless clauses when present.
#
# @param field<String, Symbol> The property specified for validation
#
# @option :if<Symbol, Proc> The name of a method or a Proc to call to
# determine if the validation should occur.
# @option :unless<Symbol, Proc> The name of a method or a Proc to call to
# determine if the validation should not occur
# All additional key/value pairs are passed through to the validator
# that is sub-classing this GenericValidator
#
def initialize(field, opts = {})
@if_clause = opts.delete(:if)
@unless_clause = opts.delete(:unless)
end
# Add an error message to a target resource. If the error corresponds to a
# specific field of the resource, add it to that field, otherwise add it
# as a :general message.
#
# @param <Object> target the resource that has the error
# @param <String> message the message to add
# @param <Symbol> field_name the name of the field that caused the error
#
# TODO - should the field_name for a general message be :default???
#
def add_error(target, message, field_name = :general)
target.errors.add(field_name, message)
end
# Call the validator. "call" is used so the operation is BoundMethod and
# Block compatible. This must be implemented in all concrete classes.
#
# @param <Object> target the resource that the validator must be called
# against
# @return <Boolean> true if valid, otherwise false
def call(target)
raise NotImplementedError, "CouchRest::Validation::GenericValidator::call must be overriden in a subclass"
end
# Determines if this validator should be run against the
# target by evaluating the :if and :unless clauses
# optionally passed while specifying any validator.
#
# @param <Object> target the resource that we check against
# @return <Boolean> true if should be run, otherwise false
def execute?(target)
if unless_clause = self.unless_clause
if unless_clause.is_a?(Symbol)
return false if target.send(unless_clause)
elsif unless_clause.respond_to?(:call)
return false if unless_clause.call(target)
end
end
if if_clause = self.if_clause
if if_clause.is_a?(Symbol)
return target.send(if_clause)
elsif if_clause.respond_to?(:call)
return if_clause.call(target)
end
end
true
end
def ==(other)
self.class == other.class &&
self.field_name == other.field_name &&
self.class == other.class &&
self.if_clause == other.if_clause &&
self.unless_clause == other.unless_clause &&
self.instance_variable_get(:@options) == other.instance_variable_get(:@options)
end
end # class GenericValidator
end # module Validation
end # module CouchRest

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# Extracted from dm-validations 0.9.10
#
# Copyright (c) 2007 Guy van den Berg
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
module CouchRest
module Validation
##
#
# @author Guy van den Berg
# @since 0.9
class LengthValidator < GenericValidator
def initialize(field_name, options)
super
@field_name = field_name
@options = options
@min = options[:minimum] || options[:min]
@max = options[:maximum] || options[:max]
@equal = options[:is] || options[:equals]
@range = options[:within] || options[:in]
@validation_method ||= :range if @range
@validation_method ||= :min if @min && @max.nil?
@validation_method ||= :max if @max && @min.nil?
@validation_method ||= :equals unless @equal.nil?
end
def call(target)
field_value = target.validation_property_value(field_name)
return true if @options[:allow_nil] && field_value.nil?
field_value = '' if field_value.nil?
# XXX: HACK seems hacky to do this on every validation, probably should
# do this elsewhere?
field = Extlib::Inflection.humanize(field_name)
min = @range ? @range.min : @min
max = @range ? @range.max : @max
equal = @equal
case @validation_method
when :range then
unless valid = @range.include?(field_value.size)
error_message = ValidationErrors.default_error_message(:length_between, field, min, max)
end
when :min then
unless valid = field_value.size >= min
error_message = ValidationErrors.default_error_message(:too_short, field, min)
end
when :max then
unless valid = field_value.size <= max
error_message = ValidationErrors.default_error_message(:too_long, field, max)
end
when :equals then
unless valid = field_value.size == equal
error_message = ValidationErrors.default_error_message(:wrong_length, field, equal)
end
end
error_message = @options[:message] || error_message
add_error(target, error_message, field_name) unless valid
return valid
end
end # class LengthValidator
module ValidatesLength
# Validates that the length of the attribute is equal to, less than,
# greater than or within a certain range (depending upon the options
# you specify).
#
# @option :allow_nil<Boolean> true/false (default is true)
# @option :minimum ensures that the attribute's length is greater than
# or equal to the supplied value
# @option :min alias for :minimum
# @option :maximum ensures the attribute's length is less than or equal
# to the supplied value
# @option :max alias for :maximum
# @option :equals ensures the attribute's length is equal to the
# supplied value
# @option :is alias for :equals
# @option :in<Range> given a Range, ensures that the attributes length is
# include?'ed in the Range
# @option :within<Range> alias for :in
#
# @example [Usage]
#
# class Page
#
# property high, Integer
# property low, Integer
# property just_right, Integer
#
# validates_length :high, :min => 100000000000
# validates_length :low, :equals => 0
# validates_length :just_right, :within => 1..10
#
# # a call to valid? will return false unless:
# # high is greater than or equal to 100000000000
# # low is equal to 0
# # just_right is between 1 and 10 (inclusive of both 1 and 10)
#
def validates_length(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, CouchRest::Validation::LengthValidator)
end
end # module ValidatesLength
end # module Validation
end # module CouchRest

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module CouchRest
module Validation
##
#
# @author Guy van den Berg
# @since 0.9
class MethodValidator < GenericValidator
def initialize(field_name, options={})
super
@field_name, @options = field_name, options.clone
@options[:method] = @field_name unless @options.has_key?(:method)
end
def call(target)
result, message = target.send(@options[:method])
add_error(target, message, field_name) unless result
result
end
def ==(other)
@options[:method] == other.instance_variable_get(:@options)[:method] && super
end
end # class MethodValidator
module ValidatesWithMethod
##
# Validate using the given method. The method given needs to return:
# [result::<Boolean>, Error Message::<String>]
#
# @example [Usage]
#
# class Page
#
# property :zip_code, String
#
# validates_with_method :in_the_right_location?
#
# def in_the_right_location?
# if @zip_code == "94301"
# return true
# else
# return [false, "You're in the wrong zip code"]
# end
# end
#
# # A call to valid? will return false and
# # populate the object's errors with "You're in the
# # wrong zip code" unless zip_code == "94301"
#
# # You can also specify field:
#
# validates_with_method :zip_code, :in_the_right_location?
#
# # it will add returned error message to :zip_code field
#
def validates_with_method(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, CouchRest::Validation::MethodValidator)
end
end # module ValidatesWithMethod
end # module Validation
end # module CouchRest

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module CouchRest
module Validation
##
#
# @author Guy van den Berg
# @since 0.9
class NumericValidator < GenericValidator
def initialize(field_name, options={})
super
@field_name, @options = field_name, options
@options[:integer_only] = false unless @options.has_key?(:integer_only)
end
def call(target)
value = target.send(field_name)
return true if @options[:allow_nil] && value.nil?
value = value.kind_of?(BigDecimal) ? value.to_s('F') : value.to_s
error_message = @options[:message]
precision = @options[:precision]
scale = @options[:scale]
if @options[:integer_only]
return true if value =~ /\A[+-]?\d+\z/
error_message ||= ValidationErrors.default_error_message(:not_an_integer, field_name)
else
# FIXME: if precision and scale are not specified, can we assume that it is an integer?
# probably not, as floating point numbers don't have hard
# defined scale. the scale floats with the length of the
# integral and precision. Ie. if precision = 10 and integral
# portion of the number is 9834 (4 digits), the max scale will
# be 6 (10 - 4). But if the integral length is 1, max scale
# will be (10 - 1) = 9, so 1.234567890.
if precision && scale
#handles both Float when it has scale specified and BigDecimal
if precision > scale && scale > 0
return true if value =~ /\A[+-]?(?:\d{1,#{precision - scale}}|\d{0,#{precision - scale}}\.\d{1,#{scale}})\z/
elsif precision > scale && scale == 0
return true if value =~ /\A[+-]?(?:\d{1,#{precision}}(?:\.0)?)\z/
elsif precision == scale
return true if value =~ /\A[+-]?(?:0(?:\.\d{1,#{scale}})?)\z/
else
raise ArgumentError, "Invalid precision #{precision.inspect} and scale #{scale.inspect} for #{field_name} (value: #{value.inspect} #{value.class})"
end
elsif precision && scale.nil?
# for floats, if scale is not set
#total number of digits is less or equal precision
return true if value.gsub(/[^\d]/, '').length <= precision
#number of digits before decimal == precision, and the number is x.0. same as scale = 0
return true if value =~ /\A[+-]?(?:\d{1,#{precision}}(?:\.0)?)\z/
else
return true if value =~ /\A[+-]?(?:\d+|\d*\.\d+)\z/
end
error_message ||= ValidationErrors.default_error_message(:not_a_number, field_name)
end
add_error(target, error_message, field_name)
# TODO: check the gt, gte, lt, lte, and eq options
return false
end
end # class NumericValidator
module ValidatesIsNumber
# Validate whether a field is numeric
#
def validates_is_number(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, CouchRest::Validation::NumericValidator)
end
end # module ValidatesIsNumber
end # module Validation
end # module CouchRest

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module CouchRest
module Validation
##
#
# @author Guy van den Berg
# @since 0.9
class RequiredFieldValidator < GenericValidator
def initialize(field_name, options={})
super
@field_name, @options = field_name, options
end
def call(target)
value = target.validation_property_value(field_name)
property = target.validation_property(field_name)
return true if present?(value, property)
error_message = @options[:message] || default_error(property)
add_error(target, error_message, field_name)
false
end
protected
# Boolean property types are considered present if non-nil.
# Other property types are considered present if non-blank.
# Non-properties are considered present if non-blank.
def present?(value, property)
boolean_type?(property) ? !value.nil? : !value.blank?
end
def default_error(property)
actual = boolean_type?(property) ? :nil : :blank
ValidationErrors.default_error_message(actual, field_name)
end
# Is +property+ a boolean property?
#
# Returns true for Boolean, ParanoidBoolean, TrueClass, etc. properties.
# Returns false for other property types.
# Returns false for non-properties.
def boolean_type?(property)
property ? property.primitive == TrueClass : false
end
end # class RequiredFieldValidator
module ValidatesPresent
##
# Validates that the specified attribute is present.
#
# For most property types "being present" is the same as being "not
# blank" as determined by the attribute's #blank? method. However, in
# the case of Boolean, "being present" means not nil; i.e. true or
# false.
#
# @note
# dm-core's support lib adds the blank? method to many classes,
# @see lib/dm-core/support/blank.rb (dm-core) for more information.
#
# @example [Usage]
#
# class Page
#
# property :required_attribute, String
# property :another_required, String
# property :yet_again, String
#
# validates_present :required_attribute
# validates_present :another_required, :yet_again
#
# # a call to valid? will return false unless
# # all three attributes are !blank?
# end
def validates_present(*fields)
opts = opts_from_validator_args(fields)
add_validator_to_context(opts, fields, CouchRest::Validation::RequiredFieldValidator)
end
end # module ValidatesPresent
end # module Validation
end # module CouchRest