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