From 3bc29c859cc5532df0ffd633ce7febab18a1514e Mon Sep 17 00:00:00 2001
From: HamishWHC <20359560+HamishWHC@users.noreply.github.com>
Date: Sun, 26 Jan 2025 13:31:28 +1100
Subject: [PATCH] fix: recurse into ZodArray during openapi generation

---
 packages/zod/src/converter.test.ts | 28 ++++++++++++++++++++++++++++
 packages/zod/src/converter.ts      |  2 ++
 2 files changed, 30 insertions(+)

diff --git a/packages/zod/src/converter.test.ts b/packages/zod/src/converter.test.ts
index b64a23350..b1e661489 100644
--- a/packages/zod/src/converter.test.ts
+++ b/packages/zod/src/converter.test.ts
@@ -69,6 +69,7 @@ describe('array types', () => {
     const schema = z.array(z.string())
     expect(zodToJsonSchema(schema)).toEqual({
       type: 'array',
+      items: { type: 'string' },
     })
   })
 
@@ -76,6 +77,9 @@ describe('array types', () => {
     const schema = z.array(z.string()).min(1).max(5)
     expect(zodToJsonSchema(schema)).toEqual({
       type: 'array',
+      items: {
+        type: 'string',
+      },
       minItems: 1,
       maxItems: 5,
     })
@@ -268,12 +272,36 @@ describe('lazy types', () => {
       }),
     )
 
+    const tree1 = {
+      type: 'object',
+      properties: {
+        value: { type: 'string' },
+        children: {
+          type: 'array',
+          items: {},
+        },
+      },
+      required: ['value'],
+    }
+    const tree2 = {
+      type: 'object',
+      properties: {
+        value: { type: 'string' },
+        children: {
+          type: 'array',
+          items: tree1,
+        },
+      },
+      required: ['value'],
+    }
+
     expect(zodToJsonSchema(treeSchema, { maxLazyDepth: 2 })).toEqual({
       type: 'object',
       properties: {
         value: { type: 'string' },
         children: {
           type: 'array',
+          items: tree2,
         },
       },
       required: ['value'],
diff --git a/packages/zod/src/converter.ts b/packages/zod/src/converter.ts
index 15d4be1ef..978a58a45 100644
--- a/packages/zod/src/converter.ts
+++ b/packages/zod/src/converter.ts
@@ -364,6 +364,8 @@ export function zodToJsonSchema(
 
       const json: JSONSchema.JSONSchema = { type: 'array' }
 
+      json.items = zodToJsonSchema(def.type, childOptions)
+
       if (def.exactLength) {
         json.maxItems = def.exactLength.value
         json.minItems = def.exactLength.value