fix(zod): avoid adding redundant not to optional schemas #1593

Author: bigint

src/_vendor/zod-to-json-schema/parsers/optional.ts

@@ -3,8 +3,11 @@ import { JsonSchema7Type, parseDef } from '../parseDef';
 import { Refs } from '../Refs';
 
 export const parseOptionalDef = (def: ZodOptionalDef, refs: Refs): JsonSchema7Type | undefined => {
-  if (refs.currentPath.toString() === refs.propertyPath?.toString()) {
-    return parseDef(def.innerType._def, refs);
+  if (
+    refs.propertyPath &&
+    refs.currentPath.slice(0, refs.propertyPath.length).toString() === refs.propertyPath.toString()
+  ) {
+    return parseDef(def.innerType._def, { ...refs, currentPath: refs.currentPath });
   }
 
   const innerSchema = parseDef(def.innerType._def, {

tests/helpers/zod.test.ts

@@ -71,18 +71,11 @@ describe('zodResponseFormat', () => {
             "units": {
               "anyOf": [
                 {
-                  "anyOf": [
-                    {
-                      "not": {},
-                    },
-                    {
-                      "enum": [
-                        "c",
-                        "f",
-                      ],
-                      "type": "string",
-                    },
+                  "enum": [
+                    "c",
+                    "f",
                   ],
+                  "type": "string",
                 },
                 {
                   "type": "null",