From cf7e5ebe3550e67e5f5bd61d953cf77bb7eb283c Mon Sep 17 00:00:00 2001
From: Yury Tinyukov <y.tinyukov@pointpay.io>
Date: Sat, 27 May 2023 04:05:39 +0300
Subject: [PATCH] checking query params for nil value

---
 pkg/codegen/templates/client.tmpl | 58 ++++++++++++++++---------------
 1 file changed, 30 insertions(+), 28 deletions(-)

diff --git a/pkg/codegen/templates/client.tmpl b/pkg/codegen/templates/client.tmpl
index 58df443c76..f3afe84288 100644
--- a/pkg/codegen/templates/client.tmpl
+++ b/pkg/codegen/templates/client.tmpl
@@ -194,36 +194,38 @@ func New{{$opid}}Request{{if .HasBody}}WithBody{{end}}(server string{{genParamAr
     }
 
 {{if .QueryParams}}
-    queryValues := queryURL.Query()
-{{range $paramIdx, $param := .QueryParams}}
-    {{if not .Required}} if params.{{.GoName}} != nil { {{end}}
-    {{if .IsPassThrough}}
-    queryValues.Add("{{.ParamName}}", {{if not .Required}}*{{end}}params.{{.GoName}})
-    {{end}}
-    {{if .IsJson}}
-    if queryParamBuf, err := json.Marshal({{if not .Required}}*{{end}}params.{{.GoName}}); err != nil {
-        return nil, err
-    } else {
-        queryValues.Add("{{.ParamName}}", string(queryParamBuf))
-    }
+    if params != nil {
+        queryValues := queryURL.Query()
+            {{range $paramIdx, $param := .QueryParams}}
+            {{if not .Required}} if params.{{.GoName}} != nil { {{end}}
+            {{if .IsPassThrough}}
+            queryValues.Add("{{.ParamName}}", {{if not .Required}}*{{end}}params.{{.GoName}})
+            {{end}}
+            {{if .IsJson}}
+            if queryParamBuf, err := json.Marshal({{if not .Required}}*{{end}}params.{{.GoName}}); err != nil {
+                return nil, err
+            } else {
+                queryValues.Add("{{.ParamName}}", string(queryParamBuf))
+            }
 
-    {{end}}
-    {{if .IsStyled}}
-    if queryFrag, err := runtime.StyleParamWithLocation("{{.Style}}", {{.Explode}}, "{{.ParamName}}", runtime.ParamLocationQuery, {{if not .Required}}*{{end}}params.{{.GoName}}); err != nil {
-        return nil, err
-    } else if parsed, err := url.ParseQuery(queryFrag); err != nil {
-       return nil, err
-    } else {
-       for k, v := range parsed {
-           for _, v2 := range v {
-               queryValues.Add(k, v2)
-           }
-       }
+            {{end}}
+            {{if .IsStyled}}
+            if queryFrag, err := runtime.StyleParamWithLocation("{{.Style}}", {{.Explode}}, "{{.ParamName}}", runtime.ParamLocationQuery, {{if not .Required}}*{{end}}params.{{.GoName}}); err != nil {
+                return nil, err
+            } else if parsed, err := url.ParseQuery(queryFrag); err != nil {
+               return nil, err
+            } else {
+               for k, v := range parsed {
+                   for _, v2 := range v {
+                       queryValues.Add(k, v2)
+                   }
+               }
+            }
+            {{end}}
+            {{if not .Required}}}{{end}}
+        {{end}}
+        queryURL.RawQuery = queryValues.Encode()
     }
-    {{end}}
-    {{if not .Required}}}{{end}}
-{{end}}
-    queryURL.RawQuery = queryValues.Encode()
 {{end}}{{/* if .QueryParams */}}
     req, err := http.NewRequest("{{.Method}}", queryURL.String(), {{if .HasBody}}body{{else}}nil{{end}})
     if err != nil {