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module Arel
module Attributes
class Attribute < Struct.new :relation, :name, :column
def eq other
Nodes::Equality.new self, other
end
def in other
Nodes::In.new self, other
end
def count distinct = false
Nodes::Count.new [self], distinct
end
def sum
Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
end
def maximum
Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
end
def average
Nodes::Avg.new [self], Nodes::SqlLiteral.new('avg_id')
end
def gteq right
Nodes::GreaterThanOrEqual.new self, right
end
def gt right
Nodes::GreaterThan.new self, right
end
end
class String < Attribute; end
class Time < Attribute; end
class Boolean < Attribute; end
class Decimal < Attribute; end
class Float < Attribute; end
class Integer < Attribute; end
end
Attribute = Attributes::Attribute
end
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