Programming Phoenix LiveView B7: Page 141

ddrouin · 29 September 2022 01:20

In the handle_progress function I ran into trouble with the returned value from consume_upload_entry. The code in the book has this:

{:ok, path} = consume_upload_entry( ...

However consume_upload_entry just returns path apparently. So changing it to this worked
path = consume_upload_entry(...

Looking at the source code for this in LiveView:

github.com

phoenixframework/phoenix_live_view/blob/e2096c3657d5ecfa33a29f4faf22d01832bd6979/lib/phoenix_live_view/upload.ex#L253


      
                raise ArgumentError, "cannot consume uploaded files when entries are still in progress"
          
          
    {[], []} ->
                []
            end
          end
          
          
@doc """
          Consumes an individual entry or raises if it is still in progress.
          """
          def consume_uploaded_entry(%Socket{} = socket, %UploadEntry{} = entry, func)
              when is_function(func, 1) do
            unless entry.done?,
              do: raise(ArgumentError, "cannot consume uploaded files when entries are still in progress")
          
          
  conf = Map.fetch!(socket.assigns[:uploads], entry.upload_config)
            [result] = consume_entries(conf, [entry], func)
          
          
  result
          end

It raises exceptions instead of using :ok / :error