I can't use external fields in object.members validation in validation does anyone know how to solve?

[reinaldobatista]

in this case below for example does not work

  public schema = schema.create({
    enterprise_id: schema.string(),
    user_id: schema.string.optional(),
    account_receivable_id: schema.string(),
    account_receivable_event_type_id: schema.number(),
    group_id: schema.string(),
    authorized: schema.boolean.optional(),
    data: schema.object().members({
      numeroConvenio: schema.number.optional(),
      indicadorNovaDataVencimento: schema.string.optional([
        rules.requiredWhen('account_receivable_event_type_id', '=', 2),//in this case here it cannot validate with the variable outside the object
      ]),
    })
  })

another case is when the object has more than one level

  public schema = schema.create({
    data: schema.object().members({
      desconto: schema.object.optional().members({
        tipo: schema.number.optional(),
        dataExpiracao: schema.string.optional([rules.requiredWhen('tipo', '>', 0)]),//this one works
        porcentagem: schema.number.optional([rules.requiredWhen('tipo', '=', 2)]),//this one works
        valor: schema.number.optional([rules.requiredWhen('tipo', '=', 1)]),//this one works
      }),
      segundoDesconto: schema.object.optional().members({
        dataExpiracao: schema.string.optional([rules.requiredWhen('desconto.tipo', '>', 0)]),//this one doesn't work
        porcentagem: schema.number.optional([rules.requiredWhen('desconto.tipo', '=', 2)]),//this one doesn't work
        valor: schema.number.optional([rules.requiredWhen('desconto.tipo', '=', 1)]),//this one doesn't work
      }),
    })
   })

[mrfelipemartins]

After digging into the requiredWhen code I found that it uses a helper called getFieldValue to get the value of the fields in your schema. So in order to validate from the root of your schema you need to prepend a '/'

const schema = schema.create({
    topLevelProperty: schema.string(),
    myObject: {
        lowerLevelProperty: schema.string.optional([rules.requiredWhen('/topLevelProperty', '=', 'myExpectedValue')])
    }
})

If you don't provide the '/' it will search from within your current object. Here is the original explanation found in validator/build/src/Validator/helpers.d.ts

/**
 * Returns the field value for a given pointer. If pointer starts
 * with `/`, then it will be searched from the root of the
 * object, otherwise it's searched from the nearest tip
 */
export declare function getFieldValue(field: string, root: any, tip: any): any;

Also, it would be nice to have this explained in the docs.

[RomainLanz]

Also, it would be nice to have this explained in the docs.

Happy to accept a PR.

[mrfelipemartins]

I was going to but looks like there is already a PR in place:
adonisjs/v5-docs#211

[RomainLanz]

Oops, merged 👍🏻