[Feature] params.require requires array of params

This PR adds ability to accept arrays which allows you to require multiple values in one method. so instead of this:

```ruby
params.require(:person).require(:first_name)
params.require(:person).require(:last_name)
```

Here it will be one line for each params, so say if I require 10params, it will be 10lines of repeated code which is not dry. So I have added new method which does this in one line:

```ruby
params.require(:person).require([:first_name, :last_name])
```

Comments welcome

1 files changed, 17 insertions, 0 deletions

diff --git a/actionpack/test/controller/required_params_test.rb b/actionpack/test/controller/required_params_test.rb
index a901e56332..98b8e44b22 100644
--- a/actionpack/test/controller/required_params_test.rb
+++ b/actionpack/test/controller/required_params_test.rb
@@ -48,4 +48,21 @@ class ParametersRequireTest < ActiveSupport::TestCase
       ActionController::Parameters.new(person: {}).require(:person)
     end
   end
+
+  test "require array of params" do
+    safe_params = ActionController::Parameters.new(person: {first_name: 'Gaurish', title: 'Mjallo'})
+      .require(:person)
+      .require([:first_name, :last_name])
+
+    assert_kind_of Array, safe_params
+    assert_equal ['Gaurish', 'Mjallo'], safe_params
+  end
+
+  test "require array when it contains a nil values" do
+    assert_raises(ActionController::ParameterMissing) do
+      safe_params = ActionController::Parameters.new(person: {first_name: 'Gaurish', title: nil})
+        .require(:person)
+        .require([:first_name, :last_name])
+    end
+  end
 end