Class: ParamsReady::Query::PredicateOperator

Inherits:
Object
  • Object
show all
Defined in:
lib/params_ready/query/predicate_operator.rb

Direct Known Subclasses

ComparisonPredicateOperator, In

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.define_operator(name, altn, arel: nil, test: nil, inverse_of: nil) ⇒ Object 



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# File 'lib/params_ready/query/predicate_operator.rb', line 10

def self.define_operator(name, altn, arel: nil, test: nil, inverse_of: nil)
  define_singleton_method :name do
    name
  end

  define_singleton_method :altn do
    altn
  end

  if arel
    define_singleton_method :to_query do |attribute, value|
      attribute.send(arel, value)
    end
  end

  if test
    define_singleton_method :test do |record, attribute_name, value|
      attribute = record.send attribute_name
      attribute.send test, value
    end
  end

  define_singleton_method :inverse_of do
    inverse_of
  end

  unless PredicateRegistry.operator(self.name, Format.instance(:backend), true).nil?
    raise ParamsReadyError, "Operator name taken #{self.name}"
  end

  unless PredicateRegistry.operator(self.altn, Format.instance(:frontend), true).nil?
    raise ParamsReadyError, "Operator altn taken #{self.name}"
  end

  PredicateRegistry.register_operator_by_name self
  PredicateRegistry.register_operator_by_alt_name self
end

.dup ⇒ Object 



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# File 'lib/params_ready/query/predicate_operator.rb', line 6

def self.dup
  self
end

Instance Method Details

#altn ⇒ Object 



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# File 'lib/params_ready/query/predicate_operator.rb', line 48

def altn
  self.class.altn
end