13 lines
582 B
Ruby
13 lines
582 B
Ruby
# VariableDuplicatesValidator
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#
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# This validtor is designed for especially the following condition
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# - Use `accepts_nested_attributes_for :xxx` in a parent model
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# - Use `validates :xxx, uniqueness: { scope: :xxx_id }` in a child model
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class VariableDuplicatesValidator < ActiveModel::EachValidator
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def validate_each(record, attribute, value)
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duplicates = value.reject(&:marked_for_destruction?).group_by(&:key).select { |_, v| v.many? }.map(&:first)
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if duplicates.any?
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record.errors.add(attribute, "Duplicate variables: #{duplicates.join(", ")}")
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end
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end
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end
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