v6 How to implement custom validation?

[XIYO-NET]

Hello, I'm using nodejs for the first time to develop a system and I'm having a problem with it, according to the documentation: Official AdonisJS packages extend VineJS with custom rules. For example, Lucid contributes unique and exists rules to VineJS. exists rules to VineJS.
I tried username: vine.string().unique({ table: 'users', column: 'username' }) and it says: checker is not a function. then I looked at the VineJS documentation and it says Creating custom rules, I followed the docs, but I'm having trouble with Extending schema classes, I don't know

VineString.macro('unique', function (this: VineString, options: Options) {
  return this.use(uniqueRule(options))
}) 

should be written inside which file? Or where to encapsulate it?

[gribbl]

Hello, if you want to use unique and exists rules, it's a bit different from Adonis v5, which was simpler I think. The only thing I found in the documentation is here. Am I missing something?

For example, when creating a user, to make sure the email is unique:

export const createUserValidator = vine
  .compile(
    vine.object({
      email: vine.string().unique(async (db, value) => {
        const user = await db
          .from('users')
          .where('email', value)
          .first()
        return !user
      })
    })
  )

[XIYO-NET]

First of all, thank you for your response. But I don't think it's flexible enough to use it directly to operate in the validator. Because I found, based on the VineJS documentation, that extending the VineString class and the unique method would provide a linkable API to call the unique rule. So wanted to try this.
await request.validateUsing(storeAccountValidator)
const schema = vine.object({ email: vine .string() .unique({ table: 'users', column: 'email' }) })

[aikrom]

You can extend the schema type next to your rule and don't forget to add (extend) the types, otherwise you will get type errors.

[aikrom]

About unique rule, there is some discussions/issues: #4356 , #995 and PR #1012