Method: ActiveRecord::PredicateBuilder#register_handler

Defined in:
activerecord/lib/active_record/relation/predicate_builder.rb

#register_handler(klass, handler) ⇒ Object

Define how a class is converted to Arel nodes when passed to where. The handler can be any object that responds to call, and will be used for any value that === the class given. For example:

MyCustomDateRange = Struct.new(:start, :end)
handler = proc do |column, range|
  Arel::Nodes::Between.new(column,
    Arel::Nodes::And.new([range.start, range.end])
  )
end
ActiveRecord::PredicateBuilder.new("users").register_handler(MyCustomDateRange, handler)



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# File 'activerecord/lib/active_record/relation/predicate_builder.rb', line 49

def register_handler(klass, handler)
  @handlers.unshift([klass, handler])
end