69 lines
3.0 KiB
Ruby
69 lines
3.0 KiB
Ruby
module ActiveModel
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# == Active Model Acceptance Validator
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module Validations
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class AcceptanceValidator < EachValidator
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def initialize(options)
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super(options.reverse_merge(:allow_nil => true, :accept => "1"))
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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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# Note: instance_methods.map(&:to_s) is important for 1.9 compatibility
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# as instance_methods returns symbols unlike 1.8 which returns strings.
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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). Example:
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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>:on</tt> - Specifies when this validation is active (default is
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# <tt>:save</tt>, other options are <tt>:create</tt> and
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# <tt>:update</tt>).
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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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# * <tt>:if</tt> - Specifies a method, proc or string to call to determine
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# if the validation should occur (e.g. <tt>:if => :allow_validation</tt>,
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# or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
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# method, proc or string should return or evaluate to a true or false
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# value.
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# * <tt>:unless</tt> - Specifies a method, proc or string to call to
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# determine if the validation should not occur (for example,
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# <tt>:unless => :skip_validation</tt>, or
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# <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>).
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# The method, proc or string should return or evaluate to a true or
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# false value.
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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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