class Compendium::SumQuery
A SumQuery
is a Query
which runs an SQL sum statement (with a given column) Often useful in conjunction with a grouped query and counter cache (alternately, see CountQuery
)
Attributes
column[RW]
Public Class Methods
new(*args)
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Calls superclass method
Compendium::Query::new
# File lib/compendium/sum_query.rb, line 12 def initialize(*args) @report = args.shift if arg_is_report?(args.first) @column = args.slice!(1) super(*args) @options.reverse_merge!(order: "SUM(#{@column})", reverse: true) end
Private Instance Methods
execute_command(command)
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# File lib/compendium/sum_query.rb, line 22 def execute_command(command) return [] if command.nil? raise InvalidCommand unless command.respond_to?(:sum) command.sum(column) end