Problem creating button with drab

Phoenix Forum Questions / Help
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1

I need some help creating a trigger … with the “drab”

can you help me?

scenarios is that:

He calls this drab:

html
<li class="nav-item"><a drab="click:test_start('test')" class="nav-link"><i class="nav-link"></i><span class="nav-link-text">start</span></a></li>

He calls this drab:

  defhandler click:test_start(socket, sender, name_project) do
    user = socket.assigns.current_user.username
    user_id = socket.assigns.current_user.id
    query_password = from [p] in "test", select: p.password_project, where: p.name == ^name_project and p.user_id == ^user_id
    query_languagecode = from [p] in "test", select: p.languagecode, where: p.name == ^name_project and p.user_id == ^user_id
    passwd = Repo.one(query_password_project)
    languagecode = Repo.one(query_languagecode)
    databasedb = "#{name_project}"
    TestWeb.CustomController.create_function1(user, passwd)
    TestWeb.CustomController.create_function2(user, passwd)
    TestWeb.CustomController.create_function3(user, passwd)
    TestWeb.CustomController.create_function4(user, passwd)

    IO.puts("start!")
  end

problem is …

If the person clicks on this drab, and then immediately “refresh” the page, he cancels this function entirely.

Currently I need this drab to continue running even if the client refresh the page.

Would it be possible to do that?

2

You need to move your logic out of your handlers. I haven’t tried drab, but in LiveView I would start a new GenServer on mount. Then if my LiveView dies, my GenServer is still running.

3

Would you have any examples, that can help me?

4

Sorry no specific examples. But do read up on DynamicSupervisor. Try to write a GenServer that can be started dynamically with some params (like user_id for example). Play with it in the IEx and make sure you understand how to start the process and find it later by params.

Then once you got that - do the same in Drab. In the onload callback, locate or start your GenServer like you did in IEx. Now your GenServer will survive reload of page/Drab.

Edit
I think you’d start your GenServer in the click:test_start callback. Or maybe a Task will also be fine here.

1 Like
5

I’m reading this,
maybe I can send him …