52 lines
2.7 KiB
Ruby
52 lines
2.7 KiB
Ruby
module ActiveModel
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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, :default => options[:message])
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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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new_attributes = attributes.reject { |name| klass.instance_methods.map(&:to_s).include?("#{name}=") }
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klass.send(:attr_accessor, *new_attributes)
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end
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end
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module ClassMethods
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# Encapsulates the pattern of wanting to validate the acceptance of a 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 is entirely virtual. This check is
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# performed only if +terms_of_service+ 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 accepted").
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# * <tt>:on</tt> - Specifies when this validation is active (default is <tt>:save</tt>, other options <tt>:create</tt>, <tt>:update</tt>).
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# * <tt>:allow_nil</tt> - Skip validation if attribute is +nil+ (default is true).
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# * <tt>:accept</tt> - Specifies value that is considered accepted. The default value is a string "1", which
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# makes it easy to relate to an HTML checkbox. This should be set to +true+ if you are validating a database
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# column, since the attribute is typecast from "1" to +true+ before validation.
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# * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
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# occur (e.g. <tt>:if => :allow_validation</tt>, 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 value.
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# * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
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# not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => 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 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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