fix: empty array handling (#9)

vardario · Nov 2, 2023 · 1f88adb · 1f88adb
1 parent 166e33e
commit 1f88adb
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Showing 6 changed files with 18 additions and 7 deletions.
diff --git a/examples/html/package.json b/examples/html/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zod-form-validation-html-example",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "description": "",
   "main": "index.html",
   "scripts": {

diff --git a/examples/next/package.json b/examples/next/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "private": true,
   "scripts": {
     "dev": "next dev",

diff --git a/library/package.json b/library/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@vardario/zod-form-validation",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "description": "",
   "main": "dist/index.js",
   "type": "module",

diff --git a/library/src/tests/utils.test.ts b/library/src/tests/utils.test.ts
@@ -1,4 +1,5 @@
 import { describe, expect, test } from 'vitest';
+import { z } from 'zod';
 import {
   flattenObject,
   flattenSchema,
@@ -106,4 +107,13 @@ describe('utils', () => {
       expect(result.data).toStrictEqual(EXPECTED_DATA);
     }
   });
+
+  test('emptyArrayHandling', () => {
+    const schema = z.object({
+      array: z.array(z.string()),
+    });
+    const formData = new FormData();
+    formData.append('array', '');
+    expect(parseFormData(formData, schema).success).toBe(true);
+  });
 });
diff --git a/library/src/utils.ts b/library/src/utils.ts
@@ -70,7 +70,9 @@ export function preprocess<TSchema extends z.ZodSchema>(values: ObjectType, sche
   switch (zodType) {
     case z.ZodFirstPartyTypeKind.ZodArray: {
       const arraySchema = unboxedSchema._def as z.ZodArrayDef;
-      return values.length ? values.map((item) => preprocess([item], arraySchema.type)) : undefined;
+      return values.length
+        ? values.map((item) => preprocess([item], arraySchema.type)).filter((item) => item !== undefined)
+        : undefined;
     }
 
     case z.ZodFirstPartyTypeKind.ZodBigInt: {
@@ -115,9 +117,8 @@ export function formDataToObject(formData: FormData) {
   return result;
 }
 
-export function formDataToData<TSchema extends z.ZodSchema>(formData: FormData, schema: TSchema){
+export function formDataToData<TSchema extends z.ZodSchema>(formData: FormData, schema: TSchema) {
   return preprocess(formDataToObject(formData), schema);
-
 }
 
 export function objectToFormData(obj: any) {

diff --git a/package.json b/package.json
@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "root",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "license": "MIT",
   "repository": {
     "type": "git",