method

indexes

v4.2.1 - Show latest stable - 0 notes - Class: AbstractMysqlAdapter

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1 (0)
3.2.8 (0)
3.2.13 (0)
4.0.2 (0)
4.1.8 (0)
4.2.1 (0)
4.2.7 (0)
4.2.9 (0)
5.0.0.1
5.1.7
5.2.3
6.0.0
6.1.3.1
6.1.7.7
7.0.0
7.1.3.2
7.1.3.4
What's this?

indexes(table_name, name = nil) public

Returns an array of indexes for the given table.

# File activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 425
      def indexes(table_name, name = nil) #:nodoc:
        indexes = []
        current_index = nil
        execute_and_free("SHOW KEYS FROM #{quote_table_name(table_name)}", 'SCHEMA') do |result|
          each_hash(result) do |row|
            if current_index != row[:Key_name]
              next if row[:Key_name] == 'PRIMARY' # skip the primary key
              current_index = row[:Key_name]

              mysql_index_type = row[:Index_type].downcase.to_sym
              index_type  = INDEX_TYPES.include?(mysql_index_type)  ? mysql_index_type : nil
              index_using = INDEX_USINGS.include?(mysql_index_type) ? mysql_index_type : nil
              indexes << IndexDefinition.new(row[:Table], row[:Key_name], row[:Non_unique].to_i == 0, [], [], nil, nil, index_type, index_using)
            end

            indexes.last.columns << row[:Column_name]
            indexes.last.lengths << row[:Sub_part]
          end
        end

        indexes
      end

indexes

Related methods