Class: ParsingNesting::Tree::NotExpression

Inherits:
Object
  • Object
show all
Defined in:
lib/parsing_nesting/tree.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(exp) ⇒ NotExpression

Returns a new instance of NotExpression.



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# File 'lib/parsing_nesting/tree.rb', line 326

def initialize(exp)
  self.operand = exp
end

Instance Attribute Details

#operand ⇒ Object

Returns the value of attribute operand.



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# File 'lib/parsing_nesting/tree.rb', line 329

def operand
  @operand
end

Instance Method Details

#can_embed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/parsing_nesting/tree.rb', line 345

def can_embed?
  false
end

#negate ⇒ Object 



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# File 'lib/parsing_nesting/tree.rb', line 349

def negate
  operand
end

#to_query(solr_params) ⇒ Object

We have to do the weird thing with : AND NOT (real thing), because Solr 1.4.1 seems not to be able to handle “x OR NOT y” otherwise, at least in some cases, but does fine with “x OR (: AND NOT y)”, which should mean the same thing.



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# File 'lib/parsing_nesting/tree.rb', line 335

def to_query(solr_params)
  # rescue double-nots to not treat them crazy-like and make the query
  # more work for Solr than it needs to be with a double-negative.
  if operand.is_a?(NotExpression)
    operand.operand.to_query(solr_params)
  else
    "NOT " + operand.to_query(solr_params)
  end
end