28 lines
991 B
Ruby
28 lines
991 B
Ruby
# frozen_string_literal: true
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class UniqueAmongValidator < ActiveRecord::Validations::UniquenessValidator
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def validate_each(record, attribute, value)
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old_errors = []
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record.errors.each { |error| old_errors << error if error.attribute == attribute }
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# look for any duplicates at all
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super
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new_errors = []
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record.errors.each { |error| new_errors << error if error.attribute == attribute }
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# do nothing further unless there were some duplicates.
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if new_errors.size - old_errors.size != 0
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# now look only in the collection we care about.
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dupes = options[:collection].call(record).where("lower(#{attribute}) = ?", value.downcase)
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dupes = dupes.where("id != ?", record.id) if record.persisted?
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# pop off the error, if it was a false positive
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if !dupes.exists?
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record.errors.delete(attribute)
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old_errors.each { |error| record.errors.add(error.attribute, error.type, **error.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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