[Rust Reqwest] Fixes Enums in Query Parameters via Causing Compilation Failure

bin/configs/rust-reqwest-enum-query-params.yaml

@@ -0,0 +1,8 @@
+generatorName: rust
+outputDir: samples/client/others/rust/reqwest/enum-query-params
+library: reqwest
+inputSpec: modules/openapi-generator/src/test/resources/3_0/rust/enum-query-params.yaml
+templateDir: modules/openapi-generator/src/main/resources/rust
+additionalProperties:
+  supportAsync: true
+  packageName: enum-query-params-reqwest

modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache

@@ -203,9 +203,18 @@ pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration:
     {{/isDeepObject}}
     {{^isObject}}
     {{^isModel}}
+    {{^isEnum}}
+    {{#isPrimitiveType}}
     if let Some(ref param_value) = {{{vendorExtensions.x-rust-param-identifier}}} {
         req_builder = req_builder.query(&[("{{{baseName}}}", &param_value.to_string())]);
     };
+    {{/isPrimitiveType}}
+    {{^isPrimitiveType}}
+    if let Some(ref param_value) = {{{vendorExtensions.x-rust-param-identifier}}} {
+        req_builder = req_builder.query(&[("{{{baseName}}}", &serde_json::to_string(param_value)?)]);
+    };
+    {{/isPrimitiveType}}
+    {{/isEnum}}
     {{/isModel}}
     {{/isObject}}
     {{/isNullable}}
@@ -245,9 +254,19 @@ pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration:
         {{#isModel}}
         req_builder = req_builder.query(&[("{{{baseName}}}", &serde_json::to_string(param_value)?)]);
         {{/isModel}}
+        {{#isEnum}}
+        req_builder = req_builder.query(&[("{{{baseName}}}", &serde_json::to_string(param_value)?)]);
+        {{/isEnum}}
         {{^isObject}}
         {{^isModel}}
+        {{^isEnum}}
+        {{#isPrimitiveType}}
         req_builder = req_builder.query(&[("{{{baseName}}}", &param_value.to_string())]);
+        {{/isPrimitiveType}}
+        {{^isPrimitiveType}}
+        req_builder = req_builder.query(&[("{{{baseName}}}", &serde_json::to_string(param_value)?)]);
+        {{/isPrimitiveType}}
+        {{/isEnum}}
         {{/isModel}}
         {{/isObject}}
         {{/isDeepObject}}

modules/openapi-generator/src/test/resources/3_0/rust/enum-query-params.yaml

@@ -0,0 +1,123 @@
+openapi: 3.0.3
+info:
+  title: Enum Query Parameter Test
+  description: Test spec for enum and non-primitive query parameters
+  version: 1.0.0
+paths:
+  /aggregate:
+    get:
+      operationId: getAggregateData
+      summary: Get aggregated data
+      description: Test endpoint with enum query parameters referenced via $ref
+      parameters:
+        - name: timeBucket
+          in: query
+          description: Time aggregation bucket
+          required: false
+          schema:
+            $ref: '#/components/schemas/TimeBucket'
+        - name: sortDirection
+          in: query
+          description: Sort direction
+          required: false
+          schema:
+            $ref: '#/components/schemas/SortDirection'
+        - name: status
+          in: query
+          description: Status filter
+          required: true
+          schema:
+            $ref: '#/components/schemas/Status'
+      responses:
+        '200':
+          description: Successful response
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/AggregateResponse'
+        '400':
+          description: Bad request
+  /items:
+    get:
+      operationId: getItems
+      summary: Get items with filters
+      parameters:
+        - name: category
+          in: query
+          description: Item category (inline enum)
+          required: false
+          schema:
+            type: string
+            enum:
+              - electronics
+              - clothing
+              - food
+        - name: priority
+          in: query
+          description: Priority level (enum via ref)
+          required: false
+          schema:
+            $ref: '#/components/schemas/Priority'
+      responses:
+        '200':
+          description: Successful response
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Item'
+components:
+  schemas:
+    TimeBucket:
+      type: string
+      description: Time aggregation bucket options
+      enum:
+        - hour
+        - day
+        - week
+        - month
+        - year
+    SortDirection:
+      type: string
+      description: Sort direction options
+      enum:
+        - asc
+        - desc
+      default: asc
+    Status:
+      type: string
+      description: Status filter options
+      enum:
+        - active
+        - inactive
+        - pending
+        - completed
+    Priority:
+      type: string
+      description: Priority level
+      enum:
+        - low
+        - medium
+        - high
+        - critical
+    AggregateResponse:
+      type: object
+      properties:
+        count:
+          type: integer
+          format: int64
+        data:
+          type: array
+          items:
+            type: object
+            additionalProperties: true
+    Item:
+      type: object
+      properties:
+        id:
+          type: string
+        name:
+          type: string
+        category:
+          type: string

samples/client/others/rust/reqwest/enum-query-params/.gitignore

@@ -0,0 +1,3 @@
+/target/
+**/*.rs.bk
+Cargo.lock

samples/client/others/rust/reqwest/enum-query-params/.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/client/others/rust/reqwest/enum-query-params/.openapi-generator/FILES

@@ -0,0 +1,23 @@
+.gitignore
+.travis.yml
+Cargo.toml
+README.md
+docs/AggregateResponse.md
+docs/DefaultApi.md
+docs/Item.md
+docs/Priority.md
+docs/SortDirection.md
+docs/Status.md
+docs/TimeBucket.md
+git_push.sh
+src/apis/configuration.rs
+src/apis/default_api.rs
+src/apis/mod.rs
+src/lib.rs
+src/models/aggregate_response.rs
+src/models/item.rs
+src/models/mod.rs
+src/models/priority.rs
+src/models/sort_direction.rs
+src/models/status.rs
+src/models/time_bucket.rs

samples/client/others/rust/reqwest/enum-query-params/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.18.0-SNAPSHOT

samples/client/others/rust/reqwest/enum-query-params/.travis.yml

@@ -0,0 +1 @@
+language: rust

samples/client/others/rust/reqwest/enum-query-params/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "enum-query-params-reqwest"
+version = "1.0.0"
+authors = ["OpenAPI Generator team and contributors"]
+description = "Test spec for enum and non-primitive query parameters"
+# Override this license by providing a License Object in the OpenAPI.
+license = "Unlicense"
+edition = "2021"
+
+[dependencies]
+serde = { version = "^1.0", features = ["derive"] }
+serde_json = "^1.0"
+serde_repr = "^0.1"
+url = "^2.5"
+reqwest = { version = "^0.12", default-features = false, features = ["json", "multipart"] }
+
+[features]
+default = ["native-tls"]
+native-tls = ["reqwest/native-tls"]
+rustls-tls = ["reqwest/rustls-tls"]

samples/client/others/rust/reqwest/enum-query-params/README.md

@@ -0,0 +1,52 @@
+# Rust API client for enum-query-params-reqwest
+
+Test spec for enum and non-primitive query parameters
+
+
+## Overview
+
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.  By using the [openapi-spec](https://openapis.org) from a remote server, you can easily generate an API client.
+
+- API version: 1.0.0
+- Package version: 1.0.0
+- Generator version: 7.18.0-SNAPSHOT
+- Build package: `org.openapitools.codegen.languages.RustClientCodegen`
+
+## Installation
+
+Put the package under your project folder in a directory named `enum-query-params-reqwest` and add the following to `Cargo.toml` under `[dependencies]`:
+
+```
+enum-query-params-reqwest = { path = "./enum-query-params-reqwest" }
+```
+
+## Documentation for API Endpoints
+
+All URIs are relative to *http://localhost*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*DefaultApi* | [**get_aggregate_data**](docs/DefaultApi.md#get_aggregate_data) | **GET** /aggregate | Get aggregated data
+*DefaultApi* | [**get_items**](docs/DefaultApi.md#get_items) | **GET** /items | Get items with filters
+
+
+## Documentation For Models
+
+ - [AggregateResponse](docs/AggregateResponse.md)
+ - [Item](docs/Item.md)
+ - [Priority](docs/Priority.md)
+ - [SortDirection](docs/SortDirection.md)
+ - [Status](docs/Status.md)
+ - [TimeBucket](docs/TimeBucket.md)
+
+
+To get access to the crate's generated documentation, use:
+
+```
+cargo doc --open
+```
+
+## Author
+
+
+

samples/client/others/rust/reqwest/enum-query-params/docs/AggregateResponse.md

@@ -0,0 +1,12 @@
+# AggregateResponse
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**count** | Option<**i64**> |  | [optional]
+**data** | Option<[**Vec<std::collections::HashMap<String, serde_json::Value>>**](std::collections::HashMap.md)> |  | [optional]
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+