module ActionArgs::ParamsHandler
Public Instance Methods
extract_method_arguments_from_params(method_name)
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converts the request params Hash into an Array to be passed into the target Method
# File lib/action_args/params_handler.rb, line 7 def extract_method_arguments_from_params(method_name) method_parameters = method(method_name).parameters kwargs, missing_required_params = {}, [] parameter_names = method_parameters.map(&:last) method_parameters.reverse_each do |type, key| trimmed_key = key.to_s.sub(/_params\z/, '').to_sym case type when :req missing_required_params << key unless params.key? trimmed_key next when :keyreq if params.key? trimmed_key kwargs[key] = params[trimmed_key] else missing_required_params << key end when :key kwargs[key] = params[trimmed_key] if params.key? trimmed_key when :opt break if params.key? trimmed_key end # omitting parameters that are :block, :rest, :opt without a param, and :key without a param parameter_names.delete key end if missing_required_params.any? message = "Missing required parameters at #{self.class.name}##{method_name}: #{missing_required_params.join(', ')}" if Rails.version > '5' raise ActionController::BadRequest.new message else raise ActionController::BadRequest.new :required, ArgumentError.new(message) end end values = parameter_names.map {|k| params[k.to_s.sub(/_params\z/, '').to_sym]} [values, kwargs] end
strengthen_params!(method_name)
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permits declared model attributes in the params Hash note that this method mutates the given params Hash
# File lib/action_args/params_handler.rb, line 46 def strengthen_params!(method_name) permitting_model_name = self.class.instance_variable_defined?(:@permitting_model_name) && self.class.instance_variable_get(:@permitting_model_name) target_model_name = (permitting_model_name || self.class.name.sub(/.+::/, '').sub(/Controller$/, '')).singularize.underscore.tr('/', '_').to_sym permitted_attributes = self.class.instance_variable_defined?(:@permitted_attributes) && self.class.instance_variable_get(:@permitted_attributes) method_parameters = method(method_name).parameters method_parameters.each do |type, key| trimmed_key = key.to_s.sub(/_params\z/, '').to_sym if (trimmed_key == target_model_name) && permitted_attributes params.require(trimmed_key) if %i[req keyreq].include?(type) params[trimmed_key] = params[trimmed_key].try :permit, *permitted_attributes if params.key? trimmed_key end end end