method

columns_for_distinct

v7.1.3.4 - Show latest stable - 0 notes - Class: ActiveRecord::ConnectionAdapters::SchemaStatements

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What's this?

columns_for_distinct(columns, orders) public

Given a set of columns and an ORDER BY clause, returns the columns for a SELECT DISTINCT. PostgreSQL, MySQL, and Oracle override this for custom DISTINCT syntax - they require the order columns appear in the SELECT.

columns_for_distinct("posts.id", ["posts.created_at desc"])

Show source

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1385
      def columns_for_distinct(columns, orders) # :nodoc:
        columns
      end

columns_for_distinct

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