FetchLinks demo can't work

[julianlecalvez]

Hello,

I'm trying to have this example working on my project :
https://prismic.io/docs/ruby/query-the-api/fetch-linked-document-fields

I have 2 custom types : "etude" and "auteur"

• "etude" has a linkedDocument to "auteur" named "auteur"
• "auteur" has several properties but I'm trying at least to get "nom" (StructuredText)

So when I try to get the study, it works :
study = Prismic.api('https://****.prismic.io/api').query(Prismic::Predicates.at('document.type', 'etude')}).results[0]

Then I added the fetchlink :
study = Prismic.api('https://****.prismic.io/api').query(Prismic::Predicates.at('document.type', 'etude'), {'fetchLinks' => 'auteur.nom'}).results[0]
I got an error pointing this line : undefined method "call' for nil:NilClass"

I tried to simply put "auteur" or "etude.auteur" and the error disapeared, but I'm unable to get the linked "auteur" as a top-level document. I tried those syntaxes, I always get an empty array or null :

• author = study["etude.auteur-link"] --> null
• author = study["etude.auteur"] --> []
• author = study["auteur.nom"] --> null

I can't have it work. Do you have any idea ?

Thanks

[coreyaus]

Update

I can confirm this bug still seems to exist when attempting to retrieve multiple fields from a linked document. Everything works when retrieving a single value, as per the example in the docs:

document = api.query(
    Prismic::Predicates.at("my.recipe.uid", "chocolate-chip-cookies"),
    { "fetchLinks" => "author.name" }
).results[0]

However, when following the documentation for fetching multiple fields from a linked document, I'm seeing the same undefined method 'call' for nil:NilClass error outlined above. It seems "fetchLinks" does not accept a list of attributes as suggested in the docs.

Question

1. What is the accepted way to fetch multiple fields?

Current workaround

At the moment I'm having to run a separate query to fetch the author directly

@doc = api.getByUID('article', params[:uid], {
    "fetchLinks" => "author.full_name"
})
author_id = @doc["#{@doc.type}.author"].id
@author = api.getByID(author_id) if !author_id.nil?

[LimeBlast]

I have the same issue, but in my instance I'm unable to use even one "fetchLinks" item.