hector97rch

hector97rch

Error rendering view, implementing the many function

Hi I’m new to elixir and I have a problem when i render one view using many, all of this happens when I call get_users the error its this:

# Could not render "usuario.json" for UsuariosWeb.UserView, please define a matching clause for render/2 or define a template at "lib/usuarios_web/templates/user/*". No templates were compiled for this module. Assigns:

my view its this:

defmodule UsuariosWeb.UserView do

  use UsuariosWeb, :view

  def render("usuarios.json", %{usuarios: usuarios}) do

    %{usuarios: render_many(usuarios, UsuariosWeb.UserView, "usuario.json")}

  end

  def render("usuario.json", %{usuario: usuario}) do

      %{

          id: usuario.id,

          name: usuario.name,

          email: usuario.email,

          estado: usuario.estado

      }

  end

end

and my contoller its this:

def show_usuarios(conn, _params) do

    usuarios = Usuarios.User.buscar_usuarios()

    case usuarios != [] do

        true ->

          conn

            |>put_status(200)

            |> put_resp_content_type("application/json")

            |>render("usuarios.json", %{usuarios: usuarios})

        false ->

          {:error, "no hay usuarios"}

    end

  end

  def show_usuario(conn, %{"id" => id}) do

      case Usuarios.User.buscar_usuario(id) do

        nil->

          {:error, "usuario no encontrado!"}

        usuario->

          conn

            |> put_status(200)

            |> render("usuario.json", %{usuario: usuario})

      end

  end

Most Liked

stefanchrobot

stefanchrobot

Try this:

%{usuarios: render_many(usuarios, UsuariosWeb.UserView, "usuario.json", as: :usuario)}

From the docs:

The underlying user is passed to the view and template as :user , which is inferred from the view name.

which means that

%{usuarios: render_many(usuarios, UsuariosWeb.UserView, "usuario.json")}

is equivalent to:

Enum.map(usuarios, fn user ->
  render(UserView, "usuario.json", user: user)
end)

because your view is named UserView.

As a side not, I think you can just use if in your controllers:

if usuario = Usuarios.User.buscar_usuario(id) do
  # conn ...
else
  {:error, "usuario no encontrado!"}
end

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