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Contents
module Sunspot
module Query
module Connective #:nodoc:
#
# Base class for connectives (conjunctions and disjunctions).
#
class Abstract < Scope
def initialize(setup) #:nodoc:
@setup = setup
@components = []
end
#
# Connective as solr params.
#
def to_params #:nodoc:
{ :fq => to_boolean_phrase }
end
#
# Express the connective as a Lucene boolean phrase.
#
def to_boolean_phrase #:nodoc:
if @components.length == 1
@components.first.to_boolean_phrase
else
component_phrases = @components.map do |component|
component.to_boolean_phrase
end
"(#{component_phrases.join(" #{connector} ")})"
end
end
#
# Add a component to the connective. All components must implement the
# #to_boolean_phrase method.
#
def add_component(component) #:nodoc:
@components << component
end
end
#
# Disjunctions combine their components with an OR operator.
#
class Disjunction < Abstract
#
# Add a conjunction to the disjunction. This overrides the method in
# the Scope class since scopes are implicitly conjunctive and thus
# can return themselves as a conjunction. Inside a disjunction, however,
# a conjunction must explicitly be created.
#
def add_conjunction
@components << conjunction = Conjunction.new(setup)
conjunction
end
private
def connector
'OR'
end
end
#
# Conjunctions combine their components with an AND operator.
#
class Conjunction < Abstract
private
def connector
'AND'
end
end
end
end
end
Version data entries
4 entries across 4 versions & 2 rubygems