Class: ActiveRecord::Refined::AST::Ordering

Inherits:
Node
  • Object
show all
Defined in:
lib/active_record/refined/ast.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Node

#as, #asc, #desc

Constructor Details

#initialize(operand, direction, nulls = nil) ⇒ Ordering

Returns a new instance of Ordering.



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# File 'lib/active_record/refined/ast.rb', line 379

def initialize(operand, direction, nulls = nil)
  @operand = operand
  @direction = direction
  @nulls = nulls
end

Instance Attribute Details

#direction ⇒ Object (readonly)

Returns the value of attribute direction.



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# File 'lib/active_record/refined/ast.rb', line 377

def direction
  @direction
end

#nulls ⇒ Object (readonly)

Returns the value of attribute nulls.



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# File 'lib/active_record/refined/ast.rb', line 377

def nulls
  @nulls
end

#operand ⇒ Object (readonly)

Returns the value of attribute operand.



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# File 'lib/active_record/refined/ast.rb', line 377

def operand
  @operand
end

Instance Method Details

#nulls_first ⇒ Object

MySQL has no NULLS FIRST/LAST, but Arel emulates it there with a leading IS NULL ordering, so these are portable.



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# File 'lib/active_record/refined/ast.rb', line 387

def nulls_first
  Ordering.new(operand, direction, :nulls_first)
end

#nulls_last ⇒ Object 



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# File 'lib/active_record/refined/ast.rb', line 391

def nulls_last
  Ordering.new(operand, direction, :nulls_last)
end

#to_arel(table) ⇒ Object 



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# File 'lib/active_record/refined/ast.rb', line 395

def to_arel(table)
  ordering = to_arel_operand(operand, table).public_send(direction)
  nulls ? ordering.public_send(nulls) : ordering
end