okari5678

okari5678

Programming Phoenix LiveView:

socket is being accessed in the function body, hence the need to include it in the function head.
Current:
def maybe_track_user(

  •     product,*
    
  •     %{assigns: %{live_action: :show, user_token: user_token}}*
    
  •     ) do*
    
  •            if connected?(socket) do*
    
  •            user = Accounts.get_user_by_session_token(user_token)*
    
  •            # do tracking here!*
    
  • end*

Expected:
def maybe_track_user(

  •  product,*
    
  •  %{assigns: %{live_action: :show, user_token: user_token}} **= socket***
    
  •  ) do*
    
  •          if connected?(socket) do*
    
  •          user = Accounts.get_user_by_session_token(user_token)*
    
  •         # do tracking here!*
    

end

Title: Programming Phoenix LiveView: B3.0: Include “=socket” in function header (page 255)
Example: Programming Flutter - ‘pub get’ command not working (page 15)

Please also add the book’s tag if it has not already present, thanks!

Marked As Solved

SophieDeBenedetto

SophieDeBenedetto

Author of Programming Phoenix LiveView

Hi! Thanks for submitting your question. It does in fact look like there is a mistake in that code! The correct case statement should read like this:

case Presence.get_by_key("user_activity", product.name) do
  [] ->
    Presence.track(
      pid,
      "user_activity",
      product.name, %{users: [%{email: user.email}]}
    )

  %{metas: [%{users: active_users_for_product}]} ->
    Presence.update(pid, "user_activity", product.name, %{
      users: [active_users_for_product | %{email: user.email}]
    })
end

You’ll find that updated in the next Beta release. In the meantime, you can copy in the correction from this comment.

Where Next?

Popular Pragmatic Bookshelf topics Top

jimmykiang
This test is broken right out of the box… — FAIL: TestAgent (7.82s) agent_test.go:77: Error Trace: agent_test.go:77 agent_test.go:...
New
Alexandr
Hi everyone! There is an error on the page 71 in the book “Programming machine learning from coding to depp learning” P. Perrotta. You c...
New
mikecargal
Title: Hands-On Rust (Chap 8 (Adding a Heads Up Display) It looks like ​.with_simple_console_no_bg​(SCREEN_WIDTH*2, SCREEN_HEIGHT*2...
New
alanq
This isn’t directly about the book contents so maybe not the right forum…but in some of the code apps (e.g. turbo/06) it sends a TURBO_ST...
New
rmurray10127
Title: Intuitive Python: docker run… denied error (page 2) Attempted to run the docker command in both CLI and Powershell PS C:\Users\r...
New
brian-m-ops
#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...
New
digitalbias
Title: Build a Weather Station with Elixir and Nerves: Problem connecting to Postgres with Grafana on (page 64) If you follow the defau...
New
taguniversalmachine
It seems the second code snippet is missing the code to set the current_user: current_user: Accounts.get_user_by_session_token(session["...
New
andreheijstek
After running /bin/setup, the first error was: The foreman' command exists in these Ruby versions: That was easy to fix: gem install fore...
New
davetron5000
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
New

Other popular topics Top

Devtalk
Reading something? Working on something? Planning something? Changing jobs even!? If you’re up for sharing, please let us know what you’...
1037 19435 386
New
AstonJ
A thread that every forum needs! Simply post a link to a track on YouTube (or SoundCloud or Vimeo amongst others!) on a separate line an...
New
wolf4earth
@AstonJ prompted me to open this topic after I mentioned in the lockdown thread how I started to do a lot more for my fitness. https://f...
New
siddhant3030
I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...
New
AstonJ
I have seen the keycaps I want - they are due for a group-buy this week but won’t be delivered until October next year!!! :rofl: The Ser...
New
mafinar
Crystal recently reached version 1. I had been following it for awhile but never got to really learn it. Most languages I picked up out o...
New
gagan7995
API 4 Path: /user/following/ Method: GET Description: Returns the list of all names of people whom the user follows Response [ { ...
New
Maartz
Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...
New
PragmaticBookshelf
Programming Ruby is the most complete book on Ruby, covering both the language itself and the standard library as well as commonly used t...
New
RobertRichards
Hair Salon Games for Girls Fun Girls Hair Saloon game is mainly developed for kids. This game allows users to select virtual avatars to ...
New

Sub Categories: