Theo's Typesafe Cult•13mo ago

Building shadcn <Form> components for string arrays?

So I know it uses react-hook-form under the hood, but I'm struggling to figure out the best pattern for building the form for an array. Say I had a form schema like this:

const formSchema = z.object({
  socials: z.array(z.string()),
});

const formSchema = z.object({
  socials: z.array(z.string()),
});

I want to create multiple <Input /> components that should each correspond to a certain element in the "socials" array, but how would this work using shadcn <Form> components? This doesn't work, it throws an error saying "expected array, received string"

<FormField
  control={form.control}
  name="socials"
  render={({ field }) => (
    <FormItem>
      <FormLabel className="sr-only">Create post</FormLabel>
      <FormControl>
        {/* I want these inputs to correspond to each element in the array, how do I achieve this? */}
        <Input
          {...field}
        />
        <Input
          {...field}
        />
        <Input
          {...field}
        />
      </FormControl>
      <FormDescription className="sr-only">
        Paste in your Spotify link
      </FormDescription>
      <FormMessage />
    </FormItem>
  )}
/>

<FormField
  control={form.control}
  name="socials"
  render={({ field }) => (
    <FormItem>
      <FormLabel className="sr-only">Create post</FormLabel>
      <FormControl>
        {/* I want these inputs to correspond to each element in the array, how do I achieve this? */}
        <Input
          {...field}
        />
        <Input
          {...field}
        />
        <Input
          {...field}
        />
      </FormControl>
      <FormDescription className="sr-only">
        Paste in your Spotify link
      </FormDescription>
      <FormMessage />
    </FormItem>
  )}
/>

3 Replies

dan•13mo ago

https://react-hook-form.com/docs/usefieldarray

Performant, flexible and extensible forms with easy-to-use validation.

zendevOP•13mo ago

Ahh so this is the only way, I was hoping there was a slightly less complex pattern but all good field arrays it is

dan•13mo ago

form are complex yay

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Building shadcn <Form> components for string arrays?