I’m creating a read AshGraphql query, and I want it to return an error for certain conditions. When I call Ash.Query.add_error(query, "some error message") or similar in the action prepare, the GraphQL query returns:

%{
  "data" => %{"listMemberSelfSubscriptions" => nil},
  "errors" => [
    %{
      "locations" => [%{"column" => 3, "line" => 2}],
      "message" => "Something went wrong. Unique error id: `dd416b26-3ffd-4731-aae3-279a2131cb05`",
      "path" => ["listMemberSelfSubscriptions"]
    }
  ]
}

It always returns a generic “Something went wrong”. How do I pass an error message to the response?

If I use raw Ash.Query without AshGraphql, calling Ash.Query.add_error() results in an UnknownError:

 %Ash.Error.Unknown{
   errors: [
     %Ash.Error.Unknown.UnknownError{
       error: ": Test error",
       field: nil,
       value: nil,
       splode: Ash.Error,
       bread_crumbs: [],
       vars: [],
       path: [],
       stacktrace: #Splode.Stacktrace<>,
       class: :unknown
     }
   ]
 }

For that matter, how do I use Ash.Query.add_error()? There’s no documentation for it:

CleanShot 2024-12-07 at 10.40.47@2x1728×254 5.83 KB