foreign_key_name

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1288
        def foreign_key_name(table_name, options)
          identifier = "#{table_name}_#{options.fetch(:column)}_fk"
          hashed_identifier = Digest::SHA256.hexdigest(identifier).first(10)
          options.fetch(:name) do
            "fk_rails_#{hashed_identifier}"
          end
        end