a little background个
我正在使用shadcn UI库和Zod在我的Next.js Reaction应用程序中创建一些简单的表单.
输入类型为select
和text
The problem个
我正在遵循shadcn文档,了解如何使用Zod和shadcn的UI组件设置表单,但当text
输入的值发生更改时,我收到错误消息:
Warning: A component is changing an uncontrolled input to be controlled. This is likely caused by the value changing from undefined to a defined value, which should not happen.
Worth mentioning个
该错误仅在更改text
(用户名)输入值时出现.
此外,尽管出现错误,该表单仍工作正常.
What I've tried个
我已经查找了错误,我发现答案是在{...field}
之后添加value
或defaultValue
,并使用useState('')
挂钩的组合,这解决了错误,但现在它不允许我提交表格.
Code个
'use client'
import {
Form,
FormControl,
FormDescription,
FormField,
FormItem,
FormLabel,
FormMessage,
} from "@/components/ui/form"
import { useForm } from 'react-hook-form'
import { zodResolver } from "@hookform/resolvers/zod"
import * as z from "zod"
import {
Select,
SelectContent,
SelectItem,
SelectTrigger,
SelectValue,
} from "@/components/ui/select"
import { toast } from "@/components/ui/use-toast"
import Link from "next/link"
import { Input } from "@/components/ui/input"
import { ReactNode, useState } from "react"
const FormSchema = z.object({
email: z
.string({
required_error: "Please select an email to display.",
})
.email(),
username: z.string(),
})
const ZodForm = () => {
const form = useForm<z.infer<typeof FormSchema>>({
resolver: zodResolver(FormSchema),
})
function onSubmit(data: z.infer<typeof FormSchema>) {
console.log(data);
toast({
title: "You submitted the following values:",
description: (
<pre className="mt-2 w-[340px] rounded-md bg-slate-950 p-4">
<code className="text-white">{JSON.stringify(data, null, 2)}</code>
</pre>
),
})
}
return (
<Form {...form}>
<form onSubmit={form.handleSubmit(onSubmit)} className="w-2/3 space-y-6">
<FormField
control={form.control}
name="email"
render={({ field }) => (
<FormItem>
<FormLabel>Email</FormLabel>
<Select onValueChange={field.onChange} defaultValue={field.value}>
<FormControl>
<SelectTrigger>
<SelectValue placeholder="Select a verified email to display" />
</SelectTrigger>
</FormControl>
<SelectContent>
<SelectItem value="m@example.com">m@example.com</SelectItem>
<SelectItem value="m@google.com">m@google.com</SelectItem>
<SelectItem value="m@support.com">m@support.com</SelectItem>
</SelectContent>
</Select>
<FormDescription>
You can manage email addresses in your{" "}
<Link href="/examples/forms">email settings</Link>.
</FormDescription>
<FormMessage />
</FormItem>
)}
/>
<FormField
control={form.control}
name={'username'}
render={({ field }) => (
<FormItem>
<FormLabel>Username</FormLabel>
<FormControl>
<Input placeholder="shadcn" {...field} />
</FormControl>
<FormDescription>
This is your public display name.
</FormDescription>
<FormMessage />
</FormItem>
)}
/>
<button type="submit">Submit</button>
</form>
</Form>
)
}
export default ZodForm