Contents

class UnaryMinus < Arity1Operators
  Operator.register('-', UnaryMinus, 3)

  def to_sql
    operand = @operand.to_sql
    fail(ArgumentError, ("#{operand} is not a number")) if operand !~ /^\d+$/
    -operand.to_i
  end

  def evaluate(attributes={})
    [e-mail](attributes).to_i
  end

end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
lamep-0.2.1	lib/lamep/Expressions/unary_minus.rb
lamep-0.2	lib/lamep/Expressions/unary_minus.rb