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rails_param
Commit d169d11f by stantoncbradley
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array validation for primative datatypes 

array validation for hashes
parent c6d98432
Showing with 139 additions and 46 deletions
lib/rails_param/param.rb
module RailsParam
module Param
DEFAULT_PRECISION = 14
class InvalidParameterError < StandardError
attr_accessor :param, :options
end
def param!(name, type, options = {})
name = name.to_s
class MockController
include RailsParam::Param
attr_accessor :params
end
def param!(name, type, options = {}, &block)
name = name.to_s unless name.is_a? Integer # keep index for validating elements
return unless params.member?(name) || options[:default].present? || options[:required]
......@@ -15,8 +22,23 @@ module RailsParam
params[name] = (options[:default].call if options[:default].respond_to?(:call)) || options[:default] if params[name].nil? and options[:default]
params[name] = options[:transform].to_proc.call(params[name]) if params[name] and options[:transform]
validate!(params[name], options)
if block_given?
if type == Array
params[name].each_with_index do |element, i|
if element.is_a?(Hash)
recurse element, &block
else
params[name][i] = recurse({ i => element }, i, &block) # supply index as key unless value is hash
end
end
else
recurse params[name], &block
end
end
params[name]
rescue InvalidParameterError => exception
exception.param, exception.options = name, options
exception.param ||= name
exception.options ||= options
raise exception
end
end
......@@ -41,6 +63,13 @@ module RailsParam
private
def recurse(params, index = nil)
raise InvalidParameterError, 'no block given' unless block_given?
controller = RailsParam::Param::MockController.new
controller.params = params
yield(controller, index)
end
def coerce(param, type, options = {})
begin
return nil if param.nil?
......@@ -52,8 +81,12 @@ module RailsParam
return Time.parse(param) if type == Time
return DateTime.parse(param) if type == DateTime
return Array(param.split(options[:delimiter] || ",")) if type == Array
return Hash[param.split(options[:delimiter] || ",").map{|c| c.split(options[:separator] || ":")}] if type == Hash
return Hash[param.split(options[:delimiter] || ",").map { |c| c.split(options[:separator] || ":") }] if type == Hash
return (/(false|f|no|n|0)$/i === param.to_s ? false : (/(true|t|yes|y|1)$/i === param.to_s ? true : nil)) if type == TrueClass || type == FalseClass || type == :boolean
if type == BigDecimal
param = param.delete('$,').strip.to_f if param.is_a?(String)
return BigDecimal.new(param, (options[:precision] || DEFAULT_PRECISION))
end
return nil
rescue ArgumentError
raise InvalidParameterError, "'#{param}' is not a valid #{type}"
......
spec/rails_param/param_spec.rb
......@@ -4,7 +4,8 @@ require 'action_controller'
class MyController < ActionController::Base
include RailsParam::Param
def params; end
def params;
end
end
describe RailsParam::Param do
......@@ -18,7 +19,7 @@ describe RailsParam::Param do
describe "transform" do
context "with a method" do
it "transforms the value" do
allow(controller).to receive(:params).and_return({ "word" => "foo" })
allow(controller).to receive(:params).and_return({"word" => "foo"})
controller.param! :word, String, transform: :upcase
expect(controller.params["word"]).to eql("FOO")
end
......@@ -26,7 +27,7 @@ describe RailsParam::Param do
context "with a block" do
it "transforms the value" do
allow(controller).to receive(:params).and_return({ "word" => "FOO" })
allow(controller).to receive(:params).and_return({"word" => "FOO"})
controller.param! :word, String, transform: lambda { |n| n.downcase }
expect(controller.params["word"]).to eql("foo")
end
......@@ -36,7 +37,7 @@ describe RailsParam::Param do
describe "default" do
context "with a value" do
it "defaults to the value" do
allow(controller).to receive(:params).and_return({ })
allow(controller).to receive(:params).and_return({})
controller.param! :word, String, default: "foo"
expect(controller.params["word"]).to eql("foo")
end
......@@ -44,7 +45,7 @@ describe RailsParam::Param do
context "with a block" do
it "defaults to the block value" do
allow(controller).to receive(:params).and_return({ })
allow(controller).to receive(:params).and_return({})
controller.param! :word, String, default: lambda { "foo" }
expect(controller.params["word"]).to eql("foo")
end
......@@ -53,210 +54,269 @@ describe RailsParam::Param do
describe "coerce" do
it "converts to String" do
allow(controller).to receive(:params).and_return({ "foo" => :bar })
allow(controller).to receive(:params).and_return({"foo" => :bar})
controller.param! :foo, String
expect(controller.params["foo"]).to eql("bar")
end
it "converts to Integer" do
allow(controller).to receive(:params).and_return({ "foo" => "42" })
allow(controller).to receive(:params).and_return({"foo" => "42"})
controller.param! :foo, Integer
expect(controller.params["foo"]).to eql(42)
end
it "converts to Float" do
allow(controller).to receive(:params).and_return({ "foo" => "42.22" })
allow(controller).to receive(:params).and_return({"foo" => "42.22"})
controller.param! :foo, Float
expect(controller.params["foo"]).to eql(42.22)
end
it "converts to Array" do
allow(controller).to receive(:params).and_return({ "foo" => "2,3,4,5" })
allow(controller).to receive(:params).and_return({"foo" => "2,3,4,5"})
controller.param! :foo, Array
expect(controller.params["foo"]).to eql(["2", "3", "4", "5"])
end
it "converts to Hash" do
allow(controller).to receive(:params).and_return({ "foo" => "key1:foo,key2:bar" })
allow(controller).to receive(:params).and_return({"foo" => "key1:foo,key2:bar"})
controller.param! :foo, Hash
expect(controller.params["foo"]).to eql({ "key1" => "foo", "key2" => "bar" })
expect(controller.params["foo"]).to eql({"key1" => "foo", "key2" => "bar"})
end
it "converts to Date" do
allow(controller).to receive(:params).and_return({ "foo" => "1984-01-10" })
allow(controller).to receive(:params).and_return({"foo" => "1984-01-10"})
controller.param! :foo, Date
expect(controller.params["foo"]).to eql(Date.parse("1984-01-10"))
end
it "converts to Time" do
allow(controller).to receive(:params).and_return({ "foo" => "2014-08-07T12:25:00.000+02:00" })
allow(controller).to receive(:params).and_return({"foo" => "2014-08-07T12:25:00.000+02:00"})
controller.param! :foo, Time
expect(controller.params["foo"]).to eql(Time.parse("2014-08-07T12:25:00.000+02:00"))
end
it "converts to DateTime" do
allow(controller).to receive(:params).and_return({ "foo" => "2014-08-07T12:25:00.000+02:00" })
allow(controller).to receive(:params).and_return({"foo" => "2014-08-07T12:25:00.000+02:00"})
controller.param! :foo, DateTime
expect(controller.params["foo"]).to eql(DateTime.parse("2014-08-07T12:25:00.000+02:00"))
end
describe "BigDecimals" do
it "converts to BigDecimal using default precision" do
allow(controller).to receive(:params).and_return({"foo" => 12345.67890123456})
controller.param! :foo, BigDecimal
expect(controller.params["foo"]).to eql 12345.678901235
end
it "converts to BigDecimal using precision option" do
allow(controller).to receive(:params).and_return({"foo" => 12345.6789})
controller.param! :foo, BigDecimal, precision: 6
expect(controller.params["foo"]).to eql 12345.7
end
it "converts formatted currency string to big decimal" do
allow(controller).to receive(:params).and_return({"foo" => "$100,000"})
controller.param! :foo, BigDecimal
expect(controller.params["foo"]).to eql 100000.0
end
end
describe "booleans" do
it "converts 1/0" do
allow(controller).to receive(:params).and_return({ "foo" => "1" })
allow(controller).to receive(:params).and_return({"foo" => "1"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(true)
allow(controller).to receive(:params).and_return({ "foo" => "0" })
allow(controller).to receive(:params).and_return({"foo" => "0"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(false)
end
it "converts true/false" do
allow(controller).to receive(:params).and_return({ "foo" => "true" })
allow(controller).to receive(:params).and_return({"foo" => "true"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(true)
allow(controller).to receive(:params).and_return({ "foo" => "false" })
allow(controller).to receive(:params).and_return({"foo" => "false"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(false)
end
it "converts t/f" do
allow(controller).to receive(:params).and_return({ "foo" => "t" })
allow(controller).to receive(:params).and_return({"foo" => "t"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(true)
allow(controller).to receive(:params).and_return({ "foo" => "f" })
allow(controller).to receive(:params).and_return({"foo" => "f"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(false)
end
it "converts yes/no" do
allow(controller).to receive(:params).and_return({ "foo" => "yes" })
allow(controller).to receive(:params).and_return({"foo" => "yes"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(true)
allow(controller).to receive(:params).and_return({ "foo" => "no" })
allow(controller).to receive(:params).and_return({"foo" => "no"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(false)
end
it "converts y/n" do
allow(controller).to receive(:params).and_return({ "foo" => "y" })
allow(controller).to receive(:params).and_return({"foo" => "y"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(true)
allow(controller).to receive(:params).and_return({ "foo" => "n" })
allow(controller).to receive(:params).and_return({"foo" => "n"})
controller.param! :foo, TrueClass
expect(controller.params["foo"]).to eql(false)
end
end
it "raises InvalidParameterError if the value is invalid" do
allow(controller).to receive(:params).and_return({ "foo" => "1984-01-32" })
allow(controller).to receive(:params).and_return({"foo" => "1984-01-32"})
expect { controller.param! :foo, Date }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe 'validating nested hash' do
it 'typecasts nested attribtues' do
allow(controller).to receive(:params).and_return({'foo' => {'bar' => 1, 'baz' => 2}})
controller.param! :foo, Hash do |p|
p.param! :bar, BigDecimal
p.param! :baz, Float
end
expect(controller.params['foo']['bar']).to be_instance_of BigDecimal
expect(controller.params['foo']['baz']).to be_instance_of Float
end
end
describe 'validating array elements' do
it 'typecasts array elements' do
allow(controller).to receive(:params).and_return({'array' => ['1', '2']})
controller.param! :array, Array do |a, i|
a.param! i, Integer, required: true
end
expect(controller.params['array'][0]).to be_a Integer
expect(controller.params['array'][1]).to be_a Integer
end
it 'validates array of hashes' do
params = {'array' => [{'object'=>{ 'num' => '1', 'float' => '1.5' }},{'object'=>{ 'num' => '2', 'float' => '2.3' }}] }
allow(controller).to receive(:params).and_return(params)
controller.param! :array, Array do |a|
a.param! :object, Hash do |h|
h.param! :num, Integer, required: true
h.param! :float, Float, required: true
end
end
expect(controller.params['array'][0]['object']['num']).to be_a Integer
expect(controller.params['array'][0]['object']['float']).to be_instance_of Float
expect(controller.params['array'][1]['object']['num']).to be_a Integer
expect(controller.params['array'][1]['object']['float']).to be_instance_of Float
end
end
describe "validation" do
describe "required parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, Integer, required: true }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ })
allow(controller).to receive(:params).and_return({})
expect { controller.param! :price, Integer, required: true }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "blank parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, String, blank: false }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "price" => "" })
allow(controller).to receive(:params).and_return({"price" => ""})
expect { controller.param! :price, String, blank: false }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "format parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "price" => "50$" })
allow(controller).to receive(:params).and_return({"price" => "50$"})
expect { controller.param! :price, String, format: /[0-9]+\$/ }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, String, format: /[0-9]+\$/ }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "is parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, String, is: "50" }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "price" => "51" })
allow(controller).to receive(:params).and_return({"price" => "51"})
expect { controller.param! :price, String, is: "50" }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "min parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, Integer, min: 50 }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, Integer, min: 51 }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "max parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, Integer, max: 50 }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "price" => "50" })
allow(controller).to receive(:params).and_return({"price" => "50"})
expect { controller.param! :price, Integer, max: 49 }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "min_length parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "word" => "foo" })
allow(controller).to receive(:params).and_return({"word" => "foo"})
expect { controller.param! :word, String, min_length: 3 }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "word" => "foo" })
allow(controller).to receive(:params).and_return({"word" => "foo"})
expect { controller.param! :word, String, min_length: 4 }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "max_length parameter" do
it "succeeds" do
allow(controller).to receive(:params).and_return({ "word" => "foo" })
allow(controller).to receive(:params).and_return({"word" => "foo"})
expect { controller.param! :word, String, max_length: 3 }.to_not raise_error
end
it "raises" do
allow(controller).to receive(:params).and_return({ "word" => "foo" })
allow(controller).to receive(:params).and_return({"word" => "foo"})
expect { controller.param! :word, String, max_length: 2 }.to raise_error(RailsParam::Param::InvalidParameterError)
end
end
describe "in, within, range parameters" do
before(:each) { allow(controller).to receive(:params).and_return({ "price" => "50" }) }
before(:each) { allow(controller).to receive(:params).and_return({"price" => "50"}) }
it "succeeds in the range" do
controller.param! :price, Integer, in: 1..100
......
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