Fix templates

Author: bikmazefe

openapi-generator/templates/cli/api.handlebars

@@ -96,15 +96,14 @@ func init{{{nickname}}}() {
 							}
 						{{/isModel~}}
 						{{^isPrimitiveType}}{{^isModel}}
+							if params.IsSet(helpers.ToSnakeCase("{{paramName}}")) {
 							{{#if (eq dataType "[]string")}}
-								if params.IsSet(helpers.ToSnakeCase("{{paramName}}")) {
-										var {{paramName}} []string
-								{{else}}
-								if params.IsSet(helpers.ToSnakeCase("{{paramName}}")) {
-										var {{paramName}} map[string]interface{}
-								{{/if}}
+									var {{paramName}} []string
+							{{else}}
+									var {{paramName}} map[string]interface{}
+							{{/if}}
 
-								if err := json.Unmarshal([]byte(params.GetString(helpers.ToSnakeCase("{{{vendorExtensions.x-export-param-name}}}"))), &{{paramName}}); err != nil {
+								if err := json.Unmarshal([]byte(params.GetString(helpers.ToSnakeCase("{{{paramName}}}"))), &{{paramName}}); err != nil {
 									HandleError(err)
 								}
 								localVarOptionals.{{{vendorExtensions.x-export-param-name}}} = {{#if (eq dataType "[]string")}}{{paramName}}{{else}}optional.NewInterface({{paramName}}){{/if}}

openapi-generator/templates/go/api.mustache

@@ -164,7 +164,7 @@ func (a *{{{classname}}}Service) {{{nickname}}}(ctx _context.Context{{#hasParams
 		{{#isArray}}
 		t := localVarOptionals.{{vendorExtensions.x-export-param-name}}
 		for i := range t {
-			localVarQueryParams.Add("{{vendorExtensions.x-export-param-name}}[]", parameterToString(t[i], "multi"))
+			localVarQueryParams.Add("{{baseName}}[]", parameterToString(t[i], "multi"))
 		}
 		{{/isArray}}
 		{{^isArray}}