defmodule EventosWeb.ErrorHelpers do @moduledoc """ Conveniences for translating and building error messages. """ use Phoenix.HTML @doc """ Generates tag for inlined form input errors. """ def error_tag(form, field) do Enum.map(Keyword.get_values(form.errors, field), fn (error) -> content_tag :span, translate_error(error), class: "help-block" end) end @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(EventosWeb.Gettext, "errors", msg, msg, count, opts) else Gettext.dgettext(EventosWeb.Gettext, "errors", msg, opts) end end end