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regex_format_validation

📝 Regex Format Validation​

Validate string formats like phone numbers or postal codes using the format option with a regular expression. Provide a clear message to guide users when input is invalid.

class User < ApplicationRecord
  validates :phone, format: { with: /\,\A\d{3}-\d{3}-\d{4}\z/, message: "must be XXX-XXX-XXXX" }
end