AE
Ash Elixir•2y ago
Jason

How to determine if the current page is the last or first page in Keyset pagination

I may be missing this from the documentation, but is there a way to find out if the current "page" is the firsrt or the last?
2 Replies
Jason
JasonOP•2y ago
Looks like page.more? indicates false if the current page is the last one.
Blibs
Blibs•2y ago
This is how I implemented that in my component: 
  defp assign_page_checks(socket, %{more?: more?, after: nil, before: nil}),
    do: assign(socket, %{has_next?: more?, has_previous?: false})

  defp assign_page_checks(socket, %{more?: more?, after: _, before: nil}),
    do: assign(socket, %{has_next?: more?, has_previous?: true})

  defp assign_page_checks(socket, %{more?: more?, after: nil, before: _}),
    do: assign(socket, %{has_next?: true, has_previous?: more?})
  defp assign_page_checks(socket, %{more?: more?, after: nil, before: nil}),
    do: assign(socket, %{has_next?: more?, has_previous?: false})

  defp assign_page_checks(socket, %{more?: more?, after: _, before: nil}),
    do: assign(socket, %{has_next?: more?, has_previous?: true})

  defp assign_page_checks(socket, %{more?: more?, after: nil, before: _}),
    do: assign(socket, %{has_next?: true, has_previous?: more?})
Hopefully that can help

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