dfdcd79a58
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
67 lines
1.9 KiB
Ruby
67 lines
1.9 KiB
Ruby
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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