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method

primary_keys

Importance_0
v6.0.0 - Show latest stable - 0 notes - Class: AbstractMysqlAdapter
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primary_keys(table_name) public

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# File activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 436
      def primary_keys(table_name) # :nodoc:
        raise ArgumentError unless table_name.present?

        scope = quoted_scope(table_name)

        query_values(<<~SQL, "SCHEMA")
          SELECT column_name
          FROM information_schema.key_column_usage
          WHERE constraint_name = 'PRIMARY'
            AND table_schema = #{scope[:schema]}
            AND table_name = #{scope[:name]}
          ORDER BY ordinal_position
        SQL
      end
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