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Contents
module Ransack
class Visitor
def accept(object)
visit(object)
end
def can_accept?(object)
respond_to? DISPATCH[object.class]
end
def visit_Array(object)
object.map {|o| accept(o)}.compact
end
def visit_Ransack_Nodes_Condition(object)
object.arel_predicate if object.valid?
end
def visit_Ransack_Nodes_Grouping(object)
object.combinator == 'or' ? visit_or(object) : visit_and(object)
end
def visit_and(object)
nodes = object.values.map {|o| accept(o)}.compact
return nil unless nodes.size > 0
if nodes.size > 1
Arel::Nodes::Grouping.new(Arel::Nodes::And.new(nodes))
else
nodes.first
end
end
def visit_or(object)
nodes = object.values.map {|o| accept(o)}.compact
return nil unless nodes.size > 0
if nodes.size > 1
nodes.inject(&:or)
else
nodes.first
end
end
def visit_Ransack_Nodes_Sort(object)
object.attr.send(object.dir) if object.valid?
end
def quoted?(object)
case object
when Arel::Nodes::SqlLiteral, Bignum, Fixnum
false
else
true
end
end
def visit(object)
send(DISPATCH[object.class], object)
end
DISPATCH = Hash.new do |hash, klass|
hash[klass] = "visit_#{klass.name.gsub('::', '_')}"
end
end
end
Version data entries
20 entries across 20 versions & 2 rubygems