foreign_key_name

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1715
        def foreign_key_name(table_name, options)
          options.fetch(:name) do
            columns = Array(options.fetch(:column)).map(&:to_s)
            identifier = "#{table_name}_#{columns * '_and_'}_fk"
            hashed_identifier = OpenSSL::Digest::SHA256.hexdigest(identifier).first(10)

            "fk_rails_#{hashed_identifier}"
          end
        end