Vector search example not working

    read :semantic_search do
      argument :query, :string, allow_nil?: false

      prepare before_action(fn query, context ->
        case InterimIq.Embeddings.OpenAiEmbeddingModel.generate([query.arguments.query], []) do
          {:ok, [search_vector]} ->
            Ash.Query.filter(
              query,
              vector_cosine_distance(full_text_vector, ^search_vector) < 1
            )
            |> Ash.Query.sort([
              {
                  vector_cosine_distance(
                    full_text_vector,
                    ^search_vector
                  ),
                :asc
              }

            ])

          {:error, error} ->
            {:error, error}
        end
      end)
    end

error: undefined variable "full_text_vector"
  lib/interim_iq/project_profile_matching/profile.ex:70:21

error: misplaced operator ^search_vector

The pin operator ^ is supported only inside matches or inside custom macros. Make sure you are inside a match or all necessary macros have been required
  lib/interim_iq/project_profile_matching/profile.ex:71:21