method

primary_key

Ruby on Rails latest stable (v7.1.3.2) - 0 notes - Class: ActiveRecord::ConnectionAdapters::PostgreSQLAdapter

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8 (0)
3.0.0 (0)
3.0.9 (-3)
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3.2.1 (0)
3.2.8 (0)
3.2.13 (0)
4.0.2
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4.2.1
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6.1.3.1
6.1.7.7
7.0.0
7.1.3.2
7.1.3.4
What's this?

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v3.2.13) is shown here.

These similar methods exist in v7.1.3.2:

primary_key(table) public

Returns just a table’s primary key

Show source

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 987
      def primary_key(table)
        row = exec_query(          SELECT attr.attname          FROM pg_attribute attr          INNER JOIN pg_constraint cons ON attr.attrelid = cons.conrelid AND attr.attnum = cons.conkey[1]          WHERE cons.contype = 'p'            AND cons.conrelid = '#{quote_table_name(table)}'::regclass, 'SCHEMA').rows.first

        row && row.first
      end

primary_key

Related methods

Method deprecated or moved