Mark required elements inside group in mutually exclusive set as optional

[mintuhouse]

No description provided.

[dblock]

This is altering the original params, I don't think we want that side effect.

[dblock]

Please update CHANGELOG, too. Thanks!

[dblock]

I'm merging this.

Do you see any reason not to use deep_dup, would make things a bit shorter?

        dup_params = params.deep_dup # duplicate the params as we are going to modify them
        dup_params.reject do |param, value|
          is_nested_param = /^#{ Regexp.quote param }\[.+\]$/
          0 < params.count do |p, _|
            match = p.match(is_nested_param)
            dup_params[p][:required] = false if match && !value[:required]
            match
          end
        end

[mintuhouse]

deep_dup is a rails method. I am not sure if everyone who uses grape-swagger use it along with rails. So avoided using it.

[dblock]

Makes sense.