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