Ecto not updating change on list string

Questions / Help
, ,
1 
defp save_post(socket, :edit, post_params) do
    post = put_photo_urls(socket, socket.assigns.post)
    post_params = Map.put_new(post_params, "photo_urls", post.photo_urls)
    case Timeline.update_post(post, post_params, &consume_photos(socket, &1)) do
      {:ok, _post} ->
        {:noreply,
         socket
         |> put_flash(:info, "Post updated successfully")
         |> push_redirect(to: socket.assigns.return_to)}

      {:error, %Ecto.Changeset{} = changeset} ->
        {:noreply, assign(socket, :changeset, changeset)}
    end
  end

Why there is no change at all unless I manually type the path URL instead of just letting post.photo_urls that is a list?
``post_params = Map.put_new(post_params, “photo_urls”, [“uploads/uuid.png”])`

2

Hi @boilercoding welcome!

In order to help, we need to see your Post schema. We also need to see what the IO.inspect(post_params) output is so that we can see what information is coming in.

3 
defmodule LiveviewPlayground.Timeline.Post do
  use Ecto.Schema
  import Ecto.Changeset

  schema "posts" do
    field :body, :string
    field :likes_count, :integer, default: 0
    field :reposts_count, :integer, default: 0
    field :username, :string, default: "Anthony"
    field :photo_urls, {:array, :string}, default: []

    timestamps()
  end

  @doc false
  def changeset(post, attrs) do
    post
    |> cast(attrs, [:body, :photo_urls])
    |> validate_required([:body])
    |> validate_length(:body, min: 2, max: 250)
  end
end

IO.inspect(post_params)
%{"body" => "sent from form form"}

4

Silly me!!! I just needed to send the old post to the update function instead of sending the new one.

case Timeline.update_post(socket.assigns.post, post_params, &consume_photos(socket, &1))