method

distinct

Importance_1
v2.2.1 - Show latest stable - 0 notes - Class: ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
distinct(columns, order_by) public

Returns a SELECT DISTINCT clause for a given set of columns and a given ORDER BY clause.

PostgreSQL requires the ORDER BY columns in the select list for distinct queries, and requires that the ORDER BY include the distinct column. 

  distinct("posts.id", "posts.created_at desc")
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