Fall back to page based pagination

Author: geegog

lib/todo_backend/repo.ex

@@ -3,5 +3,5 @@ defmodule TodoBackend.Repo do
     otp_app: :todo_backend,
     adapter: Ecto.Adapters.Postgres
 
-    use Paginator
+    use Scrivener, page_size: 10
 end

lib/todo_backend/task/repository/todo_repo.ex

@@ -20,11 +20,12 @@ defmodule TodoBackend.Task.Repository.TodoRepo do
   def list_todos(params) do
     query = from(t in Todo, preload: [:user], order_by: [desc: t.inserted_at, desc: t.id], select: t)
 
-    cond do
-      params["after"] !== nil -> Repo.paginate(query, after: params["after"], cursor_fields: [:inserted_at, :id], limit: 10)
-      params["before"] !== nil -> Repo.paginate(query, before: params["before"], cursor_fields: [:inserted_at, :id], limit: 10)
-      true -> Repo.paginate(query, cursor_fields: [:inserted_at, :id], limit: 10)
-    end
+    Repo.paginate(query, params)
+    # cond do
+    #   params["after"] !== nil -> Repo.paginate(query, after: params["after"], cursor_fields: [:inserted_at, :id], limit: 10)
+    #   params["before"] !== nil -> Repo.paginate(query, before: params["before"], cursor_fields: [:inserted_at, :id], limit: 10)
+    #   true -> Repo.paginate(query, cursor_fields: [:inserted_at, :id], limit: 10)
+    # end
   end
 
   @doc """

lib/todo_backend_web/views/todo_view.ex

@@ -3,7 +3,11 @@ defmodule TodoBackendWeb.TodoView do
   alias TodoBackendWeb.TodoView
 
   def render("index.json", %{todos: todos}) do
-    %{data: render_many(todos.entries, TodoView, "todo.json"), metadata: Map.from_struct(todos.metadata)}
+    %{data: render_many(todos.entries, TodoView, "todo.json"),
+    metadata: %{page_number: todos.page_number,
+    page_size: todos.page_size,
+    total_pages: todos.total_pages,
+    total_entries: todos.total_entries}}
   end
 
   def render("show.json", %{todo: todo}) do

mix.exs

@@ -20,7 +20,7 @@ defmodule TodoBackend.MixProject do
   def application do
     [
       mod: {TodoBackend.Application, []},
-      extra_applications: [:logger, :runtime_tools]
+      extra_applications: [:logger, :runtime_tools, :scrivener_ecto]
     ]
   end
 
@@ -44,7 +44,7 @@ defmodule TodoBackend.MixProject do
       {:comeonin, "~> 5.1.2"},
       {:argon2_elixir, "~> 2.0.5"},
       {:guardian, "~> 1.2.1"},
-      {:paginator, "~> 0.6"}
+      {:scrivener_ecto, "~> 2.0"}
     ]
   end