Typescript client - generated parameter not typed as array for dictionary query params

[RogueJay]

I am raising this as it follow on from #3529, which I have determined in slightly different.

I'm trying to define a swagger file that will allow for URLs for in the following format
?filter[aField]=value&filter[otherField]=otherValue

I have worked out that the following swagger definition allows Swagger.UI to process the inputs properly, and create the correct URL

            "name": "filter",
            "in": "query",
            "style": "deepObject",
            "schema": {
              "type": "object",
              "additionalProperties": {
				  "type": "string"
				},
            }

The deepObject property is required for Swagger.UI to work correctly.

This nicely produces the typescript method definition of
filter: { [key: string]: string; } | undefined

However, the code to parse this query parameter is just defined as
url_ += "filter=" + encodeURIComponent("" + filter) + "&"

This is not how a dictionary for a query parameter. At least not a deepObject type. I think the following code would be required in Client.RequestUrl.liquid to replicate the desired approach

{%     elseif parameter.IsDictionary && parameter.IsDeepObject -%}
	for (let key in {{ parameter.VariableName }}) {
		if (Object.prototype.hasOwnProperty.call({{ parameter.VariableName }}, key)) {
			url_ += "{{ parameter.Name }}[" + key + "]=" + encodeURIComponent("" + {{ parameter.VariableName }}[key]) + "&";
		}
	};

[joskoanicic]

Was there any work on this?
The C# generator has the same problem it recognises the parameter as Dictionary and ends using this:

{% elsif parameter.IsDictionary -%}
foreach (var item_ in {{ parameter.VariableName }}) { urlBuilder_.Append(System.Uri.EscapeDataString(item_.Key) + "=").Append(System.Uri.EscapeDataString(ConvertToString(item_.Value, System.Globalization.CultureInfo.InvariantCulture))).Append("&"); }

What would work is the modified lined used from the IsDeepObject segment:

% elsif parameter.IsDictionary and parameter.IsDeepObject -%}
foreach (var item_ in {{ parameter.VariableName }}) { urlBuilder_.Append(System.Uri.EscapeDataString("{{parameter.Name}}[" + item_.Key+ "]") + "=").Append(System.Uri.EscapeDataString(ConvertToString(item_.Value, System.Globalization.CultureInfo.InvariantCulture))).Append("&"); }