Modify a comment phoenix 1.7

Phoenix Forum Questions / Help
,
1

hello
I begin to learn elixir , i try to modify a comment of my app. the post2_id no load when i want to save my comment modified. " key :post2 not found in: %{ socket"
index.html.heex :

<.modal
  :if={@live_action in [:new, :edit]}
  id="comment2-modal"
  show
  on_cancel={JS.navigate(~p"/comment2s")}
>
  <.live_component
    module={BlogWeb.Comment2Live.FormComponent}
    id={@comment2.id || :new}
    title={@page_title}
    action={@live_action}
    comment2={@comment2}
    post2_id={@post2.id}
    current_user_id={@current_user_id}
   patch={~p"/comment2s"}
  />
</.modal>

index.ex:

defmodule BlogWeb.Comment2Live.Index do
  use BlogWeb, :live_view

  alias Blog.Comment2s
  alias Blog.Comment2s.Comment2
  alias Blog.Post2s.Post2
  require Logger

  @impl true
  def mount(_params, _session, socket) do
    {:ok, stream(socket, :comment2s, Comment2s.list_comment2s(socket.assigns[:current_user].id))}


  end

thank in advance

2

Hi @pierre22 :wave: !

You are probably missing some assign(socket, :post2, ...) (or assign_new or stream_*…) somewhere, in one of the LiveView callbacks that runs before render which requires that assign to be present.

We would need more code to understand better where :slightly_smiling_face:

3

Hi @RudManusachi ,
form_component.ex

> defmodule BlogWeb.Comment2Live.FormComponent do
>   use BlogWeb, :live_component
> 
>   alias Blog.Comment2s
> 
>   @impl true
>   def render(assigns) do
>     ~H"""
>     <div>
>       <.header>
>         <%= @title %>
>         <:subtitle>Use this form to manage comment2 records in your database.</:subtitle>
>       </.header>
> 
>       <.simple_form
>         for={@form}
>         id="comment2-form"
>         phx-target={@myself}
>         phx-change="validate"
>         phx-submit="save"
>       >
>         <.input field={@form[:post2_id]} type="hidden" value={@post2_id} />
>         <.input field={@form[:user_id]} type="hidden" value={@current_user_id} />
>         <.input field={@form[:message]} type="text" label="Message" />
>         <:actions>
>           <.button phx-disable-with="Saving...">Save Comment2</.button>
>         </:actions>
>       </.simple_form>
>     </div>
>     """
>   end
> 
>   @impl true
>   def update(%{comment2: comment2} = assigns, socket) do
>     changeset = Comment2s.change_comment2(comment2)
> 
>     {:ok,
>      socket
>      |> assign(assigns)
>      |> assign_form(changeset)}
>   end

i need to add assign :post2 i think but how add a second assign? thank in advance

@impl true
  def mount(_params, _session, socket) do
    {:ok, stream(socket, :comment2s, Comment2s.list_comment2s(socket.assigns[:current_user].id))}


  end
4

You have to get the id for post2 from somewhere (this will depend on how your database schemas are modelled). For example, if a post2 has many comment2s then it could be as easy as assigning the post2_id in your index.ex apply_action/3 function.

  @impl true
  def handle_params(params, _url, socket) do
    {:noreply, apply_action(socket, socket.assigns.live_action, params)}
  end

  defp apply_action(socket, :edit, %{"id" => id}) do

    comment2 = Comment2s.get_comment2!(id)
    post2_id = comment2.post2_id

    socket
    |> assign(:page_title, "Edit Comment2")
    |> assign(:comment2, comment2)
    |> assign(:post2_id, post2_id)
  end
1 Like
5

hello @toberoni
thank for the help,
i succeeded with your help.
the solution:

defp apply_action(socket, :edit, %{“id” => id}) do
comment2 = Comment2s.get_comment2!(id)
post2_id = comment2.post2_id
current_user_id = comment2.user_id

socket
|> assign(:page_title, "Edit Comment2")
|> assign(:comment2, comment2)
|> assign(:post2_id, post2_id)
|> assign(:current_user_id, current_user_id)

end

and i modified :

<.modal
:if={@live_action in [:new, :edit]}
id=“comment2-modal”
show
on_cancel={JS.navigate(~p"/comment2s")}

<.live_component
module={BlogWeb.Comment2Live.FormComponent}
id={@comment2.id || :new}
title={@page_title}
action={@live_action}
comment2={@comment2}
post2_id={@post2_id}
current_user_id={@current_user_id}
patch={~p"/comment2s"}
/>
</.modal>

1 Like