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55 lines
2.2 KiB
Ruby
55 lines
2.2 KiB
Ruby
module ActiveModel
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module Validations
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class AcceptanceValidator < EachValidator # :nodoc:
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def initialize(options)
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super({ :allow_nil => true, :accept => "1" }.merge!(options))
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end
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def validate_each(record, attribute, value)
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unless value == options[:accept]
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record.errors.add(attribute, :accepted, options.except(:accept, :allow_nil))
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end
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end
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def setup(klass)
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attr_readers = attributes.reject { |name| klass.attribute_method?(name) }
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attr_writers = attributes.reject { |name| klass.attribute_method?("#{name}=") }
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klass.send(:attr_reader, *attr_readers)
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klass.send(:attr_writer, *attr_writers)
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end
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end
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module HelperMethods
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# Encapsulates the pattern of wanting to validate the acceptance of a
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# terms of service check box (or similar agreement).
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#
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# class Person < ActiveRecord::Base
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# validates_acceptance_of :terms_of_service
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# validates_acceptance_of :eula, message: 'must be abided'
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# end
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#
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# If the database column does not exist, the +terms_of_service+ attribute
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# is entirely virtual. This check is performed only if +terms_of_service+
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# is not +nil+ and by default on save.
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#
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# Configuration options:
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# * <tt>:message</tt> - A custom error message (default is: "must be
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# accepted").
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# * <tt>:allow_nil</tt> - Skip validation if attribute is +nil+ (default
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# is +true+).
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# * <tt>:accept</tt> - Specifies value that is considered accepted.
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# The default value is a string "1", which makes it easy to relate to
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# an HTML checkbox. This should be set to +true+ if you are validating
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# a database column, since the attribute is typecast from "1" to +true+
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# before validation.
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#
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# There is also a list of default options supported by every validator:
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# +:if+, +:unless+, +:on+ and +:strict+.
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# See <tt>ActiveModel::Validation#validates</tt> for more information
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def validates_acceptance_of(*attr_names)
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validates_with AcceptanceValidator, _merge_attributes(attr_names)
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end
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end
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end
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end
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