Saving the value of a field when following a link

Phoenix Forum Questions / Help
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1

Hello there! I have the following form:

        <.form let={f} for={@changeset} phx-change="validate" phx-target={@myself} phx-submit="submit">
            <div>
              <%= label f, :username %>
              <%= text_input f, :username, required: true %>
              <%= error_tag f, :username %>
            </div>

            <%= link "Transfer field value", to: Routes.user_test_path(@socket, :new) %>

        </.form>

How can I transfer the value from the username field to the following template by clicking button “Transfer field value” and refer to this value? Thanks in advance!

2

You could replace your link with a submit and handle the redirect in your handle_event/3 like:

def handle_event("submit", %{"user" => %{"username" => name}}, socket) do
  {
    :noreply,
    redirect(socket, to: Routes.user_test_path(socket, :new, username: name)
  }
end
3

Thanks for your reply! Сan I use something other than submit for the form? I wanted to use it for another action. Or maybe I can use several actions like sumbit on one form?

4

Hmm, first idea would be to keep track of the username in your assigns (and update it in the “validate” handler) or fetch it from the changeset via Ecto.Changeset.get_change(changeset, :username) and then use a button with a simple phx-click="redirect" and add a handler for that.

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