79 lines
2.7 KiB
Ruby
79 lines
2.7 KiB
Ruby
module ActiveModel
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module Validations
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module ClassMethods
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# Passes the record off to the class or classes specified and allows them
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# to add errors based on more complex conditions.
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#
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# class Person
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# include ActiveModel::Validations
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# validates_with MyValidator
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# end
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#
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# class MyValidator < ActiveModel::Validator
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# def validate(record)
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# if some_complex_logic
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# record.errors[:base] << "This record is invalid"
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# end
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# end
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#
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# private
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# def some_complex_logic
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# # ...
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# end
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# end
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#
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# You may also pass it multiple classes, like so:
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#
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# class Person
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# include ActiveModel::Validations
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# validates_with MyValidator, MyOtherValidator, :on => :create
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# end
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#
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# Configuration options:
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# * <tt>on</tt> - Specifies when this validation is active
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# (<tt>:create</tt> or <tt>:update</tt>
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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>).
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# The 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
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# determine if the validation should not occur
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# (e.g. <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 false value.
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#
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# If you pass any additional configuration options, they will be passed
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# to the class and available as <tt>options</tt>:
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#
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# class Person
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# include ActiveModel::Validations
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# validates_with MyValidator, :my_custom_key => "my custom value"
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# end
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#
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# class MyValidator < ActiveModel::Validator
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# def validate(record)
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# options[:my_custom_key] # => "my custom value"
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# end
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# end
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#
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def validates_with(*args, &block)
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options = args.extract_options!
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args.each do |klass|
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validator = klass.new(options, &block)
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validator.setup(self) if validator.respond_to?(:setup)
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if validator.respond_to?(:attributes) && !validator.attributes.empty?
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validator.attributes.each do |attribute|
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_validators[attribute.to_sym] << validator
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end
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else
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_validators[nil] << validator
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end
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validate(validator, options)
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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 |