I get a (KeyError) key nil not found in: %{"" => :photo} few seconds after attaching a file that I need to upload to S3 using LiveView.
Below are the necessary code snippets.
socket =
allow_upload(
socket,
:photo,
auto_upload: true,
max_entries: 1,
accept: ~w(.png .jpeg .jpg),
max_file_size: 500_000,
external: &generate_metadata/2
)
my generate_metadata function
defp generate_metadata(entry, socket) do
config = %{
region: @region,
access_key_id: System.fetch_env!("AWS_ACCESS_KEY_ID"),
secret_access_key: System.fetch_env!("AWS_SECRET_ACCESS_KEY")
}
{:ok, fields} =
SimpleS3Upload.sign_form_upload(config, @s3_bucket,
key: filename(entry),
content_type: entry.client_type,
max_file_size: socket.assigns.uploads.photo.max_file_size,
expires_in: :timer.hours(1)
)
metadata = %{
uploader: "S3",
key: filename(entry),
url: s3_url(),
fields: fields
}
{:ok, metadata, socket}
end
the upload form
<form phx-submit="save" phx-change="validate">
<%= live_file_input @uploads.photo %>
<button type="submit">Upload</button>
</form>
the necessary event functions
def handle_event("save", _params, socket) do
{completed, []} = uploaded_entries(socket, :photo)
urls =
for entry <- completed do
Path.join(s3_url(), filename(entry))
end
..........some other code......
{:noreply,
redirect(socket, to: Routes.session_path(socket, :create_session, [{:jwt, new_jwt}]))}
end
and lastly the validate function
def handle_event("validate", _params, socket) do
{:noreply, socket}
end
I appreciate any possible solutions. Thank you
