18 lines
755 B
Ruby
18 lines
755 B
Ruby
# Define a custom validator for user names.
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#
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# @example
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# validates :name, user_name: true
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#
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# @see https://guides.rubyonrails.org/active_record_validations.html#custom-validators
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class UserNameValidator < ActiveModel::EachValidator
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def validate_each(rec, attr, value)
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name = value
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rec.errors.add(attr, "already exists") if User.find_by_name(name).present?
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rec.errors.add(attr, "must be 2 to 100 characters long") if !name.length.between?(2, 100)
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rec.errors.add(attr, "cannot have whitespace or colons") if name =~ /[[:space:]]|:/
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rec.errors.add(attr, "cannot begin or end with an underscore") if name =~ /\A_|_\z/
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rec.errors.add(attr, "is not allowed") if name =~ Regexp.union(Danbooru.config.user_name_blacklist)
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end
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end
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