ActiveModel::EachValidator

EachValidator is a validator which iterates through the attributes given in the options hash invoking the validate_each method passing in the record, attribute and value.

All Active Model validations are built on top of this Validator.

Attributes

attributes[R]

Public Class Methods

new(options) click to toggle source

Returns a new validator instance. All options will be available via the options reader, however the :attributes option will be removed and instead be made available through the attributes reader.

     # File lib/active_model/validator.rb, line 140
140:     def initialize(options)
141:       @attributes = Array.wrap(options.delete(:attributes))
142:       raise ":attributes cannot be blank" if @attributes.empty?
143:       super
144:       check_validity!
145:     end

Public Instance Methods

check_validity!() click to toggle source

Hook method that gets called by the initializer allowing verification that the arguments supplied are valid. You could for example raise an ArgumentError when invalid options are supplied.

     # File lib/active_model/validator.rb, line 167
167:     def check_validity!
168:     end

validate(record) click to toggle source

Performs validation on the supplied record. By default this will call validates_each to determine validity therefore subclasses should override validates_each with validation logic.

     # File lib/active_model/validator.rb, line 150
150:     def validate(record)
151:       attributes.each do |attribute|
152:         value = record.read_attribute_for_validation(attribute)
153:         next if (value.nil? && options[:allow_nil]) || (value.blank? && options[:allow_blank])
154:         validate_each(record, attribute, value)
155:       end
156:     end

validate_each(record, attribute, value) click to toggle source

Override this method in subclasses with the validation logic, adding errors to the records errors array where necessary.

     # File lib/active_model/validator.rb, line 160
160:     def validate_each(record, attribute, value)
161:       raise NotImplementedError
162:     end

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ActiveModel::EachValidator

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