42 lines
1.3 KiB
Ruby
42 lines
1.3 KiB
Ruby
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class Base
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include ActiveModel::Model
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include ActiveModel::Validations
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include ActiveModel::Validations::Callbacks
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def self.validate_nested_attribute(*attributes)
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validates_with NestedAttributesValidator, _merge_attributes(attributes)
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end
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private
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def _merge_attributes(attr_names)
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options = attr_names.extract_options!.symbolize_keys
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attr_names.flatten!
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options[:attributes] = attr_names
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options
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end
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class NestedAttributesValidator < ActiveModel::EachValidator
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def initialize(options)
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@model_class = options[:model_class]
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super
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end
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def validate_each(record, attribute, value)
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inner_validator = @model_class.new(value) unless value.is_a? @model_class
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return if inner_validator.valid?
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add_nested_errors_for(record, attribute, inner_validator)
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end
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def add_nested_errors_for(record, attribute, other_validator)
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record.errors.messages[attribute] = other_validator.errors.messages
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record.errors.details[attribute] = other_validator.errors.details
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end
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end
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end
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