[rust] Fix array enums for generated object types (#23279)

* [rust] Fix array enums for generated object types

* [rust] Fix incorrect object ref notation in test YAML

Author: rgroothuijsen

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java

@@ -300,7 +300,7 @@ public CodegenModel fromModel(String name, Schema model) {
                     // If the type is an array, extend the name with the inner type to prevent name collisions
                     // in case multiple arrays with different types are defined. If the user has manually specified
                     // a name, use that name instead.
-                    String collectionWithTypeName = toModelName(schema.getType()) + oneOf.containerTypeMapped + oneOf.items.dataType;
+                    String collectionWithTypeName = toModelName(schema.getType()) + oneOf.containerTypeMapped + oneOf.items.baseType;
                     String oneOfName = Optional.ofNullable(schema.getTitle()).orElse(collectionWithTypeName);
                     oneOf.setName(oneOfName);
                 }

modules/openapi-generator/src/test/java/org/openapitools/codegen/rust/RustClientCodegenTest.java

@@ -271,4 +271,23 @@ public void testMultipleArrayTypesEnum() throws IOException {
         TestUtils.assertFileExists(outputPath);
         TestUtils.assertFileContains(outputPath, enumSpec);
     }
+
+    @Test
+    public void testArrayWithObjectEnumValues() throws IOException {
+        Path target = Files.createTempDirectory("test");
+        target.toFile().deleteOnExit();
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("rust")
+                .setInputSpec("src/test/resources/3_1/issue_23278.yaml")
+                .setSkipOverwrite(false)
+                .setOutputDir(target.toAbsolutePath().toString().replace("\\", "/"));
+        new DefaultGenerator().opts(configurator.toClientOptInput()).generate();
+        Path outputPath = Path.of(target.toString(), "/src/models/object_arrays_options.rs");
+        String enumSpec = linearize("pub enum ObjectArraysOptions { " +
+                "ArrayVecTestObject(Vec<models::TestObject>), " +
+                "ArrayVecTestArray(Vec<models::TestArray>)," +
+                "}");
+        TestUtils.assertFileExists(outputPath);
+        TestUtils.assertFileContains(outputPath, enumSpec);
+    }
 }

modules/openapi-generator/src/test/resources/3_1/issue_23278.yaml

@@ -0,0 +1,29 @@
+openapi: 3.1.0
+info:
+  title: oneOf with object arrays
+  description: Support object types in oneOf array enums.
+  version: 1.0.0
+components:
+  schemas:
+    ObjectArrays:
+      type: object
+      properties:
+        Options:
+          oneOf:
+            - type: array
+              items:
+                $ref: '#/components/schemas/TestObject'
+            - type: array
+              items:
+                $ref: '#/components/schemas/TestArray'
+    TestObject:
+      type: object
+      properties:
+        test:
+          type: string
+    TestArray:
+      properties:
+        test:
+          type: array
+          items:
+            type: string