Use the value from another field inside a block.

hosmelqlast year

18

• 

  jmikrut

  last year

  Hey @hosmelq i'd just build a custom

  Field

  component for your

  code

  field that's just a little "wrapper" around the built-in Code field

  
  

  
  

  there, you can use the

  useFormFields

  hook to retrieve the field's value that will determine your code field's language

  
  

  
  

  and then adjust the props, and send to the built-in Code field

• 

  hosmelqlast year

  That's awesome 😱

  
  

  
  

  Is it a package?

• 

  jmikrut

  last year

  no, you want to render the built-in field straight from Payload itself

  
  

  
  

  we don't expose the built-in Code field directly, but you can easily import it from dist

  
  

  
  

  import CodeField from 'payload/dist/admin/components/forms/field-types/Code
• 

  hosmelqlast year

  Ok, perfect. Thank you!

  
  

  
  

  To render this custom field i need to use the

  ui

  type?

• 

  jmikrut

  last year

  no, you would want to use the

  code

  field itself

  
  

  
  

  because you still want to store the data in the same way that the

  type: 'code'

  field will do

  
  

  
  

  the

  ui

  field type will not store anything in the database at all

  
  

  
  

  that field type is good for cases where you just wanna inject a button, or a third-party integration, or something, into the admin UI - - but not store data

  
  

  
  

  instead, what you want to do is just have a code field, but simply render a custom code field component

• 

  hosmelqlast year

  Ok, got it. I have to use the

  admin.components.Field

  property 😅

  
  

  
  

  I made it works with the following code.

  
  
  

  import {useFormFields} from 'payload/components/forms'
  import CodeField from 'payload/dist/admin/components/forms/field-types/Code'
  import type {Block, SelectField} from 'payload/types'
  import {createElement} from 'react'
  import type {Entries} from 'type-fest'
  
  const LANGUAGES = {
    go: 'Go',
    javascript: 'JavaScript',
    php: 'PHP',
    rust: 'Rust',
    typescript: 'TypeScript',
  }
  
  export default {
    fields: [
      {
        name: 'language',
        options: (Object.entries(LANGUAGES) as Entries<typeof LANGUAGES>).map(
          ([key, value]) => ({
            label: value,
            value: key,
          })
        ),
        required: true,
        type: 'select',
      },
      {
        name: 'code',
        required: true,
        type: 'code',
        admin: {
          components: {
            Field(field: SelectField & {path?: string}) {
              const language = useFormFields(
                ([fields]) => fields[`${field.path?.replace('code', 'language')}`]
              )
              const value = language.value as keyof typeof LANGUAGES
  
              if (LANGUAGES[value] === undefined) {
                return null
              }
  
              return createElement(CodeField, {
                admin: {
                  language: value,
                },
                name: field.name,
                path: field.path,
              })
            },
          },
          language: 'php',
        },
      },
    ],
    slug: 'code',
  } satisfies Block

  
  

  
  

  CleanShot_2023-03-28_at_9.15.23.mp4