protocol Scrivener.Paginater not implemented for #Ecto.Query

[Jaime Iniesta]

Hello, I had pagination working fine in my app using:

• phoenix 1.1.4
• phoenix_ecto 2.0
• scrivener_html 1.1
• scrivener 1.1.4

But now, after upgrading to:

• phoenix 1.2.0
• phoenix_ecto 3.0
• scrivener_html 1.3
• scrivener 2.0.0

It's failing with:

[error] #PID<0.4760.0> running MyApp.Endpoint terminated
Server: localhost:4000 (http)
Request: GET /s
** (exit) an exception was raised:
    ** (Protocol.UndefinedError) protocol Scrivener.Paginater not implemented for #Ecto.Query<from s in MyApp.Sitemap, where: s.user_id == ^1, order_by: [desc: s.inserted_at]>
        lib/scrivener/paginater.ex:1: Scrivener.Paginater.impl_for!/1
        lib/scrivener/paginater.ex:10: Scrivener.Paginater.paginate/2
        (MyApp) web/controllers/sitemap_controller.ex:28: MyApp.SitemapController.index/2
        (MyApp) web/controllers/sitemap_controller.ex:1: MyApp.SitemapController.action/2
        (MyApp) web/controllers/sitemap_controller.ex:1: MyApp.SitemapController.phoenix_controller_pipeline/2
        (MyApp) lib/MyApp/endpoint.ex:1: MyApp.Endpoint.instrument/4
        (MyApp) lib/phoenix/router.ex:261: MyApp.Router.dispatch/2
        (MyApp) web/router.ex:1: MyApp.Router.do_call/2
        (MyApp) lib/MyApp/endpoint.ex:1: MyApp.Endpoint.phoenix_pipeline/1
        (MyApp) lib/plug/debugger.ex:93: MyApp.Endpoint."call (overridable 3)"/2
        (MyApp) lib/MyApp/endpoint.ex:1: MyApp.Endpoint.call/2
        (plug) lib/plug/adapters/cowboy/handler.ex:15: Plug.Adapters.Cowboy.Handler.upgrade/4
        (cowboy) src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4

I've already cleaned up and reinstalled the deps, not sure what is failing here. This is the code in the controller:

  def index(conn, params) do
    sitemaps = Sitemap
               |> where(user_id: ^(current_user(conn).id))
               |> order_by(desc: :inserted_at)
               |> Repo.paginate(params)

    render(conn, "index.html", sitemaps: sitemaps)
  end

Any idea?
Thanks!

(Comes from mgwidmann/scrivener_html#30)

[Drew Olson]

@jaimeiniesta Hi! With the upgrade of scrivener to 2.0, the ecto-specific functionality has moved to scrivener_ecto (see the note at the top of the README). Including that library should fix your issue (assuming scrivener_html works with scrivener 2.0).

[Jaime Iniesta]

That was it! It works fine now, thanks a lot.

[MeerKatDev]

It appears when using the new MyXQL driver, with the exact same error, just followed by

"...for type Ecto.Query (struct)

I had to switch back to mariaex to make it work again.

[karan]

how to solve this error?