Any way to get access to the local API within validation functions?

richardvanbergen

2 years ago

1 2

      validate: async (value: string): Promise<string | boolean> => {
        const payload = (await import('payload')).default

        console.log(payload.findByID({
          collection: 'media-image',
          id: value
        }))

        // :( -- payload.findByID is not a function

        console.log(value, payload)
        return true
      }

• Selected Answer
  

  jmikrut

  Payload Team

  2 years ago

  Hey Richard,

  So here's the complicated part about this: validation functions are run in both the Admin panel and the server, by design. That means there's no such thing as the Local API within a validator function. That said, could you use fetch to access your REST or GraphQL API?

  Payload uses isomorphic-fetch in the background so a simple fetch call will be 100% supported in both browser and server.

  Looking forward to hearing your thoughts!

  3 replies
• 

  jmikrut

  Payload Team

  2 years ago

  Ah - as a followup, and I just thought about this now, is that through a future feature we could potentially add an additional parameter to validate functions that denotes whether it's being run on the server or browser, and if on the server, we could pass the req that includes Payload and its local APIs.

  Would this be worthwhile to you? It breaks away from the universal aspect of validation functions but hey—could be valuable.

• 

  DanRibbens

  Payload Team

  2 years ago

  Alternative to passing server or browser in a param, would it be better to add a serverValidate function to the collection definition that can be used in addition to validate?
  Then server side, Payload can call validate and serverValidate when they are both defined.

• 

  richardvanbergen

  2 years ago

  I think @DanRibbens is correct that would be the preferable solution. I think it's more explicit.

  Another alternative might be to somehow add a depth parameter to fetch the related data for you? Not sure if that could work on the admin though.

  I'll use fetch for now!

• 

  unonweb

  3 months ago

  validation functions are run in both the Admin panel and the server, by design

  ...which means that you can run local API queries - you just have to take care that it's NOT happening in the browser:

  validate: async (value, {data, id}) => {
     if (payload.findByID) {
     // server validation
        const doc = await payload.findByID({
           collection: collectionSlug,
           id: id
        })
        return doc.title // example
     } else {
     // browser validation
     }
  }