init

lib/myapp_web/views/error_helpers.ex

@@ -0,0 +1,29 @@
+defmodule MyAppWeb.ErrorHelpers do
+  @moduledoc """
+  Conveniences for translating and building error messages.
+  """
+
+  @doc """
+  Translates an error message using gettext.
+  """
+  def translate_error({msg, opts}) do
+    # Because error messages were defined within Ecto, we must
+    # call the Gettext module passing our Gettext backend. We
+    # also use the "errors" domain as translations are placed
+    # in the errors.po file.
+    # Ecto will pass the :count keyword if the error message is
+    # meant to be pluralized.
+    # On your own code and templates, depending on whether you
+    # need the message to be pluralized or not, this could be
+    # written simply as:
+    #
+    #     dngettext "errors", "1 file", "%{count} files", count
+    #     dgettext "errors", "is invalid"
+    #
+    if count = opts[:count] do
+      Gettext.dngettext(MyAppWeb.Gettext, "errors", msg, msg, count, opts)
+    else
+      Gettext.dgettext(MyAppWeb.Gettext, "errors", msg, opts)
+    end
+  end
+end

lib/myapp_web/views/error_view.ex

@@ -0,0 +1,17 @@
+defmodule MyAppWeb.ErrorView do
+  use MyAppWeb, :view
+
+  def render("404.json", _assigns) do
+    %{errors: %{detail: "Page not found"}}
+  end
+
+  def render("500.json", _assigns) do
+    %{errors: %{detail: "Internal server error"}}
+  end
+
+  # In case no render clause matches or no
+  # template is found, let's render it as 500
+  def template_not_found(_template, assigns) do
+    render "500.json", assigns
+  end
+end