From ff0ef0ade912f9507443a50578900a5775dc4d59 Mon Sep 17 00:00:00 2001
From: Mark Probst <mark.probst@gmail.com>
Date: Mon, 20 Jul 2026 18:38:21 -0400
Subject: [PATCH 1/2] fix(ruby): generate from_json!/from_dynamic! helpers for
 top-level enums (#724)

Co-Authored-By: gpt-5.6-sol via pi <noreply@openai.com>
---
 .../src/language/Ruby/RubyRenderer.ts              | 14 ++++++++++++++
 test/fixtures/ruby/Gemfile.lock                    |  1 +
 test/languages.ts                                  |  5 +----
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts b/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts
index 319948d291..003ad883e7 100644
--- a/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts
+++ b/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts
@@ -570,6 +570,20 @@ export class RubyRenderer extends ConvenienceRenderer {
                 table.push([[name], [` = "${stringEscape(json)}"`]]);
             });
             this.emitTable(table);
+
+            if (this._options.justTypes) {
+                return;
+            }
+
+            this.ensureBlankLine();
+            this.emitBlock("def self.from_dynamic!(d)", () => {
+                this.emitLine(this.fromDynamic(e, "d"));
+            });
+
+            this.ensureBlankLine();
+            this.emitBlock("def self.from_json!(json)", () => {
+                this.emitLine("from_dynamic!(JSON.parse(json))");
+            });
         });
     }
 
diff --git a/test/fixtures/ruby/Gemfile.lock b/test/fixtures/ruby/Gemfile.lock
index c4a85d511c..81f539f1b3 100644
--- a/test/fixtures/ruby/Gemfile.lock
+++ b/test/fixtures/ruby/Gemfile.lock
@@ -26,6 +26,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-22
+  x86_64-linux-gnu
 
 DEPENDENCIES
   dry-struct
diff --git a/test/languages.ts b/test/languages.ts
index 7f80f5e3b1..dcf8cfccdc 100644
--- a/test/languages.ts
+++ b/test/languages.ts
@@ -472,10 +472,7 @@ export const RubyLanguage: Language = {
         "nbl-stats.json",
         "kitchen-sink.json",
     ],
-    skipSchema: [
-        // We don't generate a convenience method for top-level enums
-        "top-level-enum.schema",
-    ],
+    skipSchema: [],
     skipMiscJSON: false,
     rendererOptions: {},
     quickTestRendererOptions: [["pokedex.json", { namespace: "QuickType" }]],

From a9cac546bcc3087d6d85fa750c682c1c8304f4b2 Mon Sep 17 00:00:00 2001
From: Mark Probst <mark.probst@gmail.com>
Date: Wed, 22 Jul 2026 15:38:58 -0400
Subject: [PATCH 2/2] fix(ruby): limit enum helpers to top-level types

---
 .../src/language/Ruby/RubyRenderer.ts         |  4 ++-
 test/fixtures/ruby/Gemfile.lock               |  1 -
 test/unit/ruby-top-level-enum-helpers.test.ts | 30 +++++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 test/unit/ruby-top-level-enum-helpers.test.ts

diff --git a/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts b/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts
index 003ad883e7..d0aa6b9d27 100644
--- a/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts
+++ b/packages/quicktype-core/src/language/Ruby/RubyRenderer.ts
@@ -1,3 +1,5 @@
+import { mapContains } from "collection-utils";
+
 import {
     ConvenienceRenderer,
     type ForbiddenWordsInfo,
@@ -571,7 +573,7 @@ export class RubyRenderer extends ConvenienceRenderer {
             });
             this.emitTable(table);
 
-            if (this._options.justTypes) {
+            if (this._options.justTypes || !mapContains(this.topLevels, e)) {
                 return;
             }
 
diff --git a/test/fixtures/ruby/Gemfile.lock b/test/fixtures/ruby/Gemfile.lock
index 81f539f1b3..c4a85d511c 100644
--- a/test/fixtures/ruby/Gemfile.lock
+++ b/test/fixtures/ruby/Gemfile.lock
@@ -26,7 +26,6 @@ GEM
 
 PLATFORMS
   arm64-darwin-22
-  x86_64-linux-gnu
 
 DEPENDENCIES
   dry-struct
diff --git a/test/unit/ruby-top-level-enum-helpers.test.ts b/test/unit/ruby-top-level-enum-helpers.test.ts
new file mode 100644
index 0000000000..f17891595f
--- /dev/null
+++ b/test/unit/ruby-top-level-enum-helpers.test.ts
@@ -0,0 +1,30 @@
+import { expect, test } from "vitest";
+
+import { InputData, JSONSchemaInput, quicktype } from "quicktype-core";
+
+async function rubyForSchema(schema: object): Promise<string> {
+    const schemaInput = new JSONSchemaInput(undefined);
+    await schemaInput.addSource({
+        name: "TopLevel",
+        schema: JSON.stringify(schema),
+    });
+
+    const inputData = new InputData();
+    inputData.addInput(schemaInput);
+
+    const result = await quicktype({ inputData, lang: "ruby" });
+    return result.lines.join("\n");
+}
+
+test("Ruby only generates enum parsing helpers for top-level enums", async () => {
+    const output = await rubyForSchema({
+        type: "object",
+        properties: {
+            status: { type: "string", enum: ["ready", "waiting"] },
+        },
+        required: ["status"],
+    });
+
+    expect(output.match(/def self\.from_dynamic!/g)).toHaveLength(1);
+    expect(output.match(/def self\.from_json!/g)).toHaveLength(1);
+});