Class: ActiveRecord::Refined::AST::GroupingSets

Inherits:
Node
  • Object
show all
Defined in:
lib/active_record/refined/ast.rb

Overview

GROUP BY GROUPING SETS / ROLLUP / CUBE: several groupings asked for at once, the totals of each coming back beside the rows. PostgreSQL has all three and the MySQL family rollup alone; the block raises for the rest before it gets this far.

Each set is a list of its own, so grouping_sets takes lists and rollup and cube take the columns themselves.

Instance Method Summary collapse

Methods inherited from Node

#as, #asc, #collate, #desc

Constructor Details

#initialize(kind, sets) ⇒ GroupingSets

Returns a new instance of GroupingSets.

Raises:

  • (ArgumentError) 


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# File 'lib/active_record/refined/ast.rb', line 1419

def initialize(kind, sets)
  raise ArgumentError, "#{kind} needs something to group by" if sets.empty?
  @kind = kind
  @sets = sets
end