44 lines
2.6 KiB
Ruby
44 lines
2.6 KiB
Ruby
module ActiveModel
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module Validations
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module ClassMethods
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# Encapsulates the pattern of wanting to validate a password or email address field with a confirmation. Example:
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#
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# Model:
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# class Person < ActiveRecord::Base
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# validates_confirmation_of :user_name, :password
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# validates_confirmation_of :email_address, :message => "should match confirmation"
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# end
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#
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# View:
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# <%= password_field "person", "password" %>
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# <%= password_field "person", "password_confirmation" %>
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#
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# The added +password_confirmation+ attribute is virtual; it exists only as an in-memory attribute for validating the password.
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# To achieve this, the validation adds accessors to the model for the confirmation attribute. NOTE: This check is performed
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# only if +password_confirmation+ is not +nil+, and by default only on save. To require confirmation, make sure to add a presence
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# check for the confirmation attribute:
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#
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# validates_presence_of :password_confirmation, :if => :password_changed?
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#
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# Configuration options:
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# * <tt>:message</tt> - A custom error message (default is: "doesn't match confirmation")
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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>: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_confirmation_of(*attr_names)
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configuration = { :message => ActiveRecord::Errors.default_error_messages[:confirmation], :on => :save }
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configuration.update(attr_names.extract_options!)
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attr_accessor(*(attr_names.map { |n| "#{n}_confirmation" }))
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validates_each(attr_names, configuration) do |record, attr_name, value|
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record.errors.add(attr_name, configuration[:message]) unless record.send("#{attr_name}_confirmation").nil? or value == record.send("#{attr_name}_confirmation")
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end
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end
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end
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end
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end |