ActionDispatch::Http::Parameters::ClassMethods
Methods
P
Instance Public methods
parameter_parsers=(parsers)

Configure the parameter parser for a given mime type.

It accepts a hash where the key is the symbol of the mime type and the value is a proc.

original_parsers = ActionDispatch::Request.parameter_parsers
xml_parser = -> (raw_post) { Hash.from_xml(raw_post) || {} }
new_parsers = original_parsers.merge(xml: xml_parser)
ActionDispatch::Request.parameter_parsers = new_parsers

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/http/parameters.rb, line 42
def parameter_parsers=(parsers)
  @parameter_parsers = parsers.transform_keys { |key| key.respond_to?(:symbol) ? key.symbol : key }
end