defmodule Home73kWeb.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: "invalid-feedback", phx_feedback_for: input_name(form, field) ) end) end @doc """ Translates an error message using gettext. """ def translate_error({msg, opts}) do # When using gettext, we typically pass the strings we want # to translate as a static argument: # # # Translate "is invalid" in the "errors" domain # dgettext("errors", "is invalid") # # # Translate the number of files with plural rules # dngettext("errors", "1 file", "%{count} files", count) # # Because the error messages we show in our forms and APIs # are defined inside Ecto, we need to translate them dynamically. # This requires us to call the Gettext module passing our gettext # backend as first argument. # # Note we use the "errors" domain, which means translations # should be written to the errors.po file. The :count option is # set by Ecto and indicates we should also apply plural rules. if count = opts[:count] do Gettext.dngettext(Home73kWeb.Gettext, "errors", msg, msg, count, opts) else Gettext.dgettext(Home73kWeb.Gettext, "errors", msg, opts) end end end