How to add Search Form in app.html.heex that reloads the page in mount

Phoenix Forum Questions / Help
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1

How can I add a search form to app.html.heex that does a get request with the query param back to index#mount?
I’m trying to do similar as described in the Simple Search Form with Phoenix elixircast
but in trying all day, I’ve read I can’t use @conn in the .form for() attribute.

this is what I have currently, but it wants to got to a handle_event/3 call, instead of reloading the index page and passing the query param in mount.

      <.form :let={f} for={} phx-submit="search">
        <.input field={f[:query]} type="search" label="Search" />
        <.button>Search</.button>
      </.form>

This is my mount where I attempt to pass the query to the location schema to search.

  def mount(params, _session, socket) do
    # def handle_event("search", params, socket) do
    dbg(params)
    locations = Faclities.list_locations(params)
    {:ok, stream(socket, :locations, Faclities.list_locations())}
  end

any suggestions?
type or paste code here

2

I haven’t seen the ElixirCast but the reason handle_event is getting called is because of the phx-submit="search". phx-submit triggers the LiveView JS to submit the form. If you remove that and add method="post" you should get the behaviour you want.

3

Hey there,

as @sodapopcan mentioned you can remove phx-submit to trigger an action instead.
If you need a get request you can simply define method="get". I would add action explicetly.
So your form should look like this:

    <.form :let={f} for={%{}} as={:search} action={~p"/"} method="get">
      <.input field={f[:query]} placeholder="Search for something" />
    </.form>

[/quote]

this way you will receive query params shaped like this: %{"search" => %{"query" => "something"}}

If you want to do validations before actually submitting the form you could use phx-trigger-action:

def mount(_, _, socket) do
  {:ok, assign(socket, :trigger_submit, false)}
end

def handle_event("submit", params, socket) do
  if params_valid?(params) do
   {:noreply, assign(socket, :trigger_submit, true)}
  else
   {:noreply, socket}
  end
end

    <.form :let={f} for={%{}} as={:search} action={~p"/"} phx-submit="submit" phx-trigger-action={@trigger_submit} method="get">
      <.input field={f[:query]} placeholder="Search for something" />
    </.form>

This way you would only actually trigger the action if all your validations were successful, which is really useful for immidiate feedback, but should be overkill in your case.

Greetings

1 Like
4

Thank you, this worked great!
Reading the Docs can be very confusing, I didn’t understand that I could add action and method attrs to the .form component for liveview.