Tutorial seat_saver part-2 : Using phoenix 1.1.3, [email protected] and the last elm packages

[ggerico]

Hi,

I got this message error in the terminal after starting the server: iex -S mix phoenix.server
error: undefined of web/elm/SeatSaver.elm failed. or: Cannot read property 'path' of undefined

The brunch process succeeded, I can see the Elm script inside the app.js in the priv directory.
But the true is, I should I have done something wrong :(

Any help?

[urfolomeus]

Does the app work when you open it in the browser? I've occasionally seen that error as a race condition between the Elm build finishing and the Brunch process completing. As soon as the Elm build finishes though Brunch recognises the changes and runs again, this time successfully.

[ggerico]

Yes, it works.

I have got the message below when I refresh the index page:
[info] GET /
[debug] Processing by SeatSaver.PageController.index/2
Parameters: %{}
Pipelines: [:browser]
[info] Sent 200 in 177µs

But the index source show an empty elm-main div.

[ggerico]

Sorry actually the brunch build didn't succeed.
The seatsaver.js is in the vendor directory but NOT imported in the priv/static/js/app.js

[urfolomeus]

OK, thanks. I'll try running the code with the version you mentioned and see if I get the same issue.

[ggerico]

thank you ~

[urfolomeus]

It seems to be working for me. Can you share you code please and I'll see if I can spot anything. Thanks :)

[ggerico]

It is working! The matter is BRUNCH WATCHED :

• first in the brunch config file: watched: ["web/static", "test/static", "web/elm/SeatSaver.elm"]
• then Brunch complains about the path but compiles the files
  Elm compile: SeatSaver.elm, in web/elm, to ../static/vendor/seatsaver.js
  25 Jan 12:02:00 - error: undefined of web/elm/SeatSaver.elm failed. or: Cannot read property 'path' of undefined
  25 Jan 12:02:01 - error: undefined of web/elm/SeatSaver.elm failed. or: Cannot read property 'path' of undefined
• finally in order to stop Brunch to complain about the path in the brunch config file again: watched: ["web/static", "test/static"]
• I reload the server and it works

[tobyhede]

I have the same issue on the latest phoenix while following the tutorial.

Adding and removing "web/elm/SeatSaver.elm" from the watched config in brunch-config.json reproduces this behavior as above.

The file will compile, but the reload fails, then you remove the watcher and the reload works, loading the previously compiled file.

[urfolomeus]

Ah yes, sorry I just realised that I still had the old version of phoenix_new in my mix archive >.<

Upgraded to 1.1.3 and am seeing the same behaviour. I'll take a look at it this evening and try to get to the root of the issue.

Thanks, folks.

[urfolomeus]

OK so a quick update: I've confirmed that it's brunch 2.2.0 where the issue arises. If you downgrade to brunch 2.1.3 everything should work as expected. Will carry on trying to locate the source of the issue.

[urfolomeus]

It looks like the issue is with the elm-brunch plugin that I'm using. Brunch seems to have updated the way that they expect plugins to be written. I raised an issue there and posited a potential fix. Will let you know how I get on. Thanks again for raising. :)

[tobyhede]

Thanks, 2.1.3 resolved the issue for me.

[urfolomeus]

Hi all,

Apologies for the late reply, been very busy of late. There is now an updated version of elm-brunch (0.4.4) that fixes this issue. I've updated the code in the SeatSaver project to reflect the move to Phoenix 1.1.3 and elm-brunch 0.4.4 and will add a post to the blog.