Address validation regex. What does this Rails validation mean? -


i have rails validation reads:

validates :address_line_1, format: {     if: :changed?,     without: /^[0-9]+$/,     multiline: true,     message: i18n.t(       :missing_street_info, scope: 'activerecord.errors.models.address'     )   }

what without section mean? regex? multiline key mean?


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