Module: Arel::Expressions

Included in:
Attributes::Attribute, Nodes::InfixOperation, Nodes::SqlLiteral, Nodes::UnaryOperation
Defined in:
lib/arel/expressions.rb

Instance Method Summary collapse

Instance Method Details

#average ⇒ Object 



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# File 'lib/arel/expressions.rb', line 20

def average
  Nodes::Avg.new [self]
end

#count(distinct = false) ⇒ Object 



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# File 'lib/arel/expressions.rb', line 4

def count distinct = false
  Nodes::Count.new [self], distinct
end

#extract(field) ⇒ Object 



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# File 'lib/arel/expressions.rb', line 24

def extract field
  Nodes::Extract.new [self], field
end

#maximum ⇒ Object 



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# File 'lib/arel/expressions.rb', line 12

def maximum
  Nodes::Max.new [self]
end

#minimum ⇒ Object 



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# File 'lib/arel/expressions.rb', line 16

def minimum
  Nodes::Min.new [self]
end

#sum ⇒ Object 



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# File 'lib/arel/expressions.rb', line 8

def sum
  Nodes::Sum.new [self]
end