Class: Squeel::Nodes::Order

Inherits:
Object
  • Object
show all
Defined in:
lib/squeel/nodes/order.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(expr, direction = 1) ⇒ Order

Returns a new instance of Order.

Raises:

  • (ArgumentError) 


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# File 'lib/squeel/nodes/order.rb', line 6

def initialize(expr, direction = 1)
  raise ArgumentError, "Direction #{direction} is not valid. Must be -1 or 1." unless [-1,1].include? direction
  @expr, @direction = expr, direction
end

Instance Attribute Details

#direction ⇒ Object (readonly)

Returns the value of attribute direction.



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# File 'lib/squeel/nodes/order.rb', line 4

def direction
  @direction
end

#expr ⇒ Object (readonly)

Returns the value of attribute expr.



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# File 'lib/squeel/nodes/order.rb', line 4

def expr
  @expr
end

Instance Method Details

#asc ⇒ Object 



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# File 'lib/squeel/nodes/order.rb', line 11

def asc
  @direction = 1
  self
end

#ascending? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/squeel/nodes/order.rb', line 21

def ascending?
  @direction == 1
end

#desc ⇒ Object 



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# File 'lib/squeel/nodes/order.rb', line 16

def desc
  @direction = -1
  self
end

#descending? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/squeel/nodes/order.rb', line 25

def descending?
  @direction == -1
end

#reverse! ⇒ Object 



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# File 'lib/squeel/nodes/order.rb', line 29

def reverse!
  @direction = - @direction
  self
end