Fix nim code generation (OpenAPITools#20752)

Same variable name declared multiple times in the same scope.
=> nim generated code does not compile.

Author: sandwoodK

modules/openapi-generator/src/main/resources/nim-client/api.mustache

@@ -37,19 +37,19 @@ proc {{{operationId}}}*(httpClient: HttpClient{{#allParams}}, {{{paramName}}}: {
   httpClient.headers["Content-Type"] = "application/x-www-form-urlencoded"{{/isMultipart}}{{#isMultipart}}
   httpClient.headers["Content-Type"] = "multipart/form-data"{{/isMultipart}}{{/hasFormParams}}{{#hasHeaderParams}}{{#headerParams}}
   httpClient.headers["{{{baseName}}}"] = {{{paramName}}}{{#isArray}}.join(","){{/isArray}}{{/headerParams}}{{#description}} ## {{{.}}}{{/description}}{{/hasHeaderParams}}{{#hasQueryParams}}
-  let query_for_api_call = encodeQuery([{{#queryParams}}
+  let url_encoded_query_params = encodeQuery([{{#queryParams}}
     ("{{{baseName}}}", ${{{paramName}}}{{#isArray}}.join(","){{/isArray}}), # {{{description}}}{{/queryParams}}
   ]){{/hasQueryParams}}{{#hasFormParams}}{{^isMultipart}}
-  let query_for_api_call = encodeQuery([{{#formParams}}
+  let form_data = encodeQuery([{{#formParams}}
     ("{{{baseName}}}", ${{{paramName}}}{{#isArray}}.join(","){{/isArray}}), # {{{description}}}{{/formParams}}
   ]){{/isMultipart}}{{#isMultipart}}
-  let query_for_api_call = newMultipartData({
+  let multipart_data = newMultipartData({
 {{#formParams}}    "{{{baseName}}}": ${{{paramName}}}{{#isArray}}.join(","){{/isArray}}, # {{{description}}}
 {{/formParams}}
   }){{/isMultipart}}{{/hasFormParams}}{{#returnType}}
 
-  let response = httpClient.{{{httpMethod}}}(basepath & {{^pathParams}}"{{{path}}}"{{/pathParams}}{{#hasPathParams}}fmt"{{{path}}}"{{/hasPathParams}}{{#hasQueryParams}} & "?" & query_for_api_call{{/hasQueryParams}}{{#hasBodyParam}}{{#bodyParams}}, $(%{{{paramName}}}){{/bodyParams}}{{/hasBodyParam}}{{#hasFormParams}}, {{^isMultipart}}$query_for_api_call{{/isMultipart}}{{#isMultipart}}multipart=query_for_api_call{{/isMultipart}}{{/hasFormParams}})
+  let response = httpClient.{{{httpMethod}}}(basepath & {{^pathParams}}"{{{path}}}"{{/pathParams}}{{#hasPathParams}}fmt"{{{path}}}"{{/hasPathParams}}{{#hasQueryParams}} & "?" & url_encoded_query_params{{/hasQueryParams}}{{#hasBodyParam}}{{#bodyParams}}, $(%{{{paramName}}}){{/bodyParams}}{{/hasBodyParam}}{{#hasFormParams}}, {{^isMultipart}}$form_data{{/isMultipart}}{{#isMultipart}}multipart=multipart_data{{/isMultipart}}{{/hasFormParams}})
   constructResult[{{{returnType}}}](response){{/returnType}}{{^returnType}}
-  httpClient.{{{httpMethod}}}(basepath & {{^pathParams}}"{{{path}}}"{{/pathParams}}{{#hasPathParams}}fmt"{{{path}}}"{{/hasPathParams}}{{#hasQueryParams}} & "?" & query_for_api_call{{/hasQueryParams}}{{#hasBodyParam}}{{#bodyParams}}, $(%{{{paramName}}}){{/bodyParams}}{{/hasBodyParam}}{{#hasFormParams}}, {{^isMultipart}}$query_for_api_call{{/isMultipart}}{{#isMultipart}}multipart=query_for_api_call{{/isMultipart}}{{/hasFormParams}}){{/returnType}}
+  httpClient.{{{httpMethod}}}(basepath & {{^pathParams}}"{{{path}}}"{{/pathParams}}{{#hasPathParams}}fmt"{{{path}}}"{{/hasPathParams}}{{#hasQueryParams}} & "?" & url_encoded_query_params{{/hasQueryParams}}{{#hasBodyParam}}{{#bodyParams}}, $(%{{{paramName}}}){{/bodyParams}}{{/hasBodyParam}}{{#hasFormParams}}, {{^isMultipart}}$form_data{{/isMultipart}}{{#isMultipart}}multipart=multipart_data{{/isMultipart}}{{/hasFormParams}}){{/returnType}}
 
 {{/operation}}{{/operations}}

samples/client/petstore/nim/petstore/apis/api_pet.nim

@@ -55,21 +55,21 @@ proc deletePet*(httpClient: HttpClient, petId: int64, apiKey: string): Response
 
 proc findPetsByStatus*(httpClient: HttpClient, status: seq[Status]): (Option[seq[Pet]], Response) =
   ## Finds Pets by status
-  let query_for_api_call = encodeQuery([
+  let url_encoded_query_params = encodeQuery([
     ("status", $status.join(",")), # Status values that need to be considered for filter
   ])
 
-  let response = httpClient.get(basepath & "/pet/findByStatus" & "?" & query_for_api_call)
+  let response = httpClient.get(basepath & "/pet/findByStatus" & "?" & url_encoded_query_params)
   constructResult[seq[Pet]](response)
 
 
 proc findPetsByTags*(httpClient: HttpClient, tags: seq[string]): (Option[seq[Pet]], Response) {.deprecated.} =
   ## Finds Pets by tags
-  let query_for_api_call = encodeQuery([
+  let url_encoded_query_params = encodeQuery([
     ("tags", $tags.join(",")), # Tags to filter by
   ])
 
-  let response = httpClient.get(basepath & "/pet/findByTags" & "?" & query_for_api_call)
+  let response = httpClient.get(basepath & "/pet/findByTags" & "?" & url_encoded_query_params)
   constructResult[seq[Pet]](response)
 
 
@@ -91,21 +91,21 @@ proc updatePet*(httpClient: HttpClient, pet: Pet): (Option[Pet], Response) =
 proc updatePetWithForm*(httpClient: HttpClient, petId: int64, name: string, status: string): Response =
   ## Updates a pet in the store with form data
   httpClient.headers["Content-Type"] = "application/x-www-form-urlencoded"
-  let query_for_api_call = encodeQuery([
+  let form_data = encodeQuery([
     ("name", $name), # Updated name of the pet
     ("status", $status), # Updated status of the pet
   ])
-  httpClient.post(basepath & fmt"/pet/{petId}", $query_for_api_call)
+  httpClient.post(basepath & fmt"/pet/{petId}", $form_data)
 
 
 proc uploadFile*(httpClient: HttpClient, petId: int64, additionalMetadata: string, file: string): (Option[ApiResponse], Response) =
   ## uploads an image
   httpClient.headers["Content-Type"] = "multipart/form-data"
-  let query_for_api_call = newMultipartData({
+  let multipart_data = newMultipartData({
     "additionalMetadata": $additionalMetadata, # Additional data to pass to server
     "file": $file, # file to upload
   })
 
-  let response = httpClient.post(basepath & fmt"/pet/{petId}/uploadImage", multipart=query_for_api_call)
+  let response = httpClient.post(basepath & fmt"/pet/{petId}/uploadImage", multipart=multipart_data)
   constructResult[ApiResponse](response)
 

samples/client/petstore/nim/petstore/apis/api_user.nim

@@ -70,12 +70,12 @@ proc getUserByName*(httpClient: HttpClient, username: string): (Option[User], Re
 
 proc loginUser*(httpClient: HttpClient, username: string, password: string): (Option[string], Response) =
   ## Logs user into the system
-  let query_for_api_call = encodeQuery([
+  let url_encoded_query_params = encodeQuery([
     ("username", $username), # The user name for login
     ("password", $password), # The password for login in clear text
   ])
 
-  let response = httpClient.get(basepath & "/user/login" & "?" & query_for_api_call)
+  let response = httpClient.get(basepath & "/user/login" & "?" & url_encoded_query_params)
   constructResult[string](response)