holobeat

holobeat

Handling live action

I am new to Phoenix_Live. I am going through Phoenix_Live project and need to handle live action in my code. Is handle_params the best place to handle the action? For example, I have :new action and have to change one of the assigns:

  def handle_params(_, _url, socket) when socket.assigns.live_action == :new do
    socket = assign(socket, selected_server: nil)
    {:noreply, socket}
  end

Marked As Solved

sodapopcan

sodapopcan

Assuming you want to access them on navigation via a patch link (<.link patch={~p"/foo/new"}>new</.link>) or a push_patch then yes, handle_params/3 is the place to do this as it is called whenever there is a patch event. From your example it looks like that is what you want. Otherwise, @live_action is available anywhere your assigns are. For example you could conditionally render a piece of your template in your render/1 callback based on the @live_action.

Just for completeness since you say you’re new, you can also write your code like this:

def handle_params(_, _url, %{assigns: %{live_action: :new}} = socket) do
  # ...

…which some people prefer, although I personally write it like you do so completely up to you :slight_smile:

PS: Welcome!

Where Next?

Popular in Questions Top

Harrisonl
We have an ECS cluster with 4 services, where each task joins a single cluster, via discovery ECS discovery service. Currently when I de...
New
electic
Hi, I am new to Elixir. I am trying to use the DateTime component to insert a date into MySQL however the there seems to be no way to fo...
New
minhajuddin
I have seen a lot of code which picks the first element from a list using Enum.at(0) instead of List.first. Is there a reason why people ...
New
Qqwy
Original source of discussion: This topic on the Pragmatic Programmers’ Functional Web Development with Elixir, OTP, and Phoenix forum. ...
New
vonH
When I run the Plug and I recompile I wind up having to use Ctrl C to quit iex and start again. Witht the help of rlwrap I can use the cu...
New
bsollish-terakeet
Credo is smart enough to check for (something like) this: assert length(the_list) == 0 with this response: Checking if an enum is empt...
New
srinivasu
How to handle excepions in elixir? Suppose i have A, B, C ,D, E modules. and each module has get() function. A.get() method will call t...
New
Brian
What is the proper way to load a module from a file in to IEX? In the python world, doing something like this pretty standard: from ....
New
dotdotdotPaul
Okay, I’m having a heck of a time trying to figure out how to best handle the validation of belongs_to associations in Ecto. I’m sure I’...
New
yawaramin
In the Dialyzer docs ( dialyzer — OTP 29.0.2 (dialyzer 6.0.1) ), there is a way to turn off a specific warning for a function: -dialyzer...
New

Other popular topics Top

hariharasudhan94
lets say i have a sample like a = 20; b = 10; if (a &gt; b) do {:ok, "a"} end if (a &lt; b) do {:ok, b} end if (a == b) do {:ok, "equa...
New
albydarned
Hello all! I am typing this post from my new MacBook Pro with the M1 chip. I’m loving it so far, and will probably use it as my daily dr...
New
gshaw
What is the idiomatic way of matching for not nil in Elixir? E.g., First way: defp halt_if_not_signed_in(conn, signed_in_account) when...
New
shahryarjb
Hello, I have map which I want to convert it to string like this: the map: %{last_name: "tavakkoli", name: "shahryar"} the string I ne...
New
fireproofsocks
Forgive me if this is obvious, but how does one delete a database record WITHOUT selecting it first? Ecto.Repo — Ecto v3.14.0 has exampl...
New
aalberti333
As the title describes, I’m trying to run Enum.map() over a list of key/value pairs, where the value is a map. My data looks like this: ...
New
nobody
Hi! In PHP: $_SERVER[‘SERVER_ADDR’] - in Elixir? Searched the docs for ip address and the web, no good results. Thanks!
New
jason.o
In the code below, if the create action is not set to accept “extra_key” as an input, it errors out with a message shown above. Is there ...
New
shijith.k
I am trying to start a new phoenix project with elixir 1.9, but mix phx.new does not work. It says that ** (Mix) The task "phx.new" could...
New
Qqwy
Update: How to use the Blogs &amp; Podcasts section You can post links to your blog posts or podcasts either in one of the Official Blog...
3271 127536 1222
New

We're in Beta

About us Mission Statement