optional Array validate

[u2]

The params validation like this.

            params do
              optional :photos, type: Array do
                optional :id, type: Integer
                optional :photo_path, type: String
                optional :width, type: Integer
                optional :height, type: Integer
                optional :description, type: String, default: ""
              end

              optional :videos, type: Array do
                optional :id, type: Integer
                optional :video_path, type: String
                optional :width, type: Integer
                optional :height, type: Integer
                optional :description, type: String
                optional :persistent_id, type: String
              end
            end
            post '/array' do
            end

When the params like below:
{"videos"=>[{"description"=>"", "height"=>"111", "id"=>"22", "video_path"=>"path", "width"=>"1111"}], "photos"=>[{"id"=>"2222", "photo_path"=>"path", "width"=>"222"}]}
it pass.
But, if the params like below:
{"videos"=>[{"description"=>"", "height"=>"111", "id"=>"22", "video_path"=>"path", "width"=>"1111"}]}
it returned the error:
no implicit conversion of String into Integer.
Then I comment the default value.

            params do
              optional :photos, type: Array do
                optional :id, type: Integer
                optional :photo_path, type: String
                optional :width, type: Integer
                optional :height, type: Integer
                optional :description, type: String#, default: ''
              end

              optional :videos, type: Array do
                optional :id, type: Integer
                optional :video_path, type: String
                optional :width, type: Integer
                optional :height, type: Integer
                optional :description, type: String
                optional :persistent_id, type: String
              end
            end

            post '/array' do
            end

The params keep like before:

{"videos"=>[{"description"=>"", "height"=>"111", "id"=>"22", "video_path"=>"path", "width"=>"1111"}]}

it passed.
It seems that if there is a default value in Array, this array must be passed.It's a bug or feature?

[dm1try]

It's definitely a bug. Seems related to #615.
It's kinda tricky to fix without refactoring "params_scope/validation" sources.

[dblock]

Fixed.