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Step flow manager for Elixir applications
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lib/step_flow/view/error_helpers.ex
defmodule StepFlow.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(StepFlow.Gettext, "errors", msg, msg, count, opts)
else
Gettext.dgettext(StepFlow.Gettext, "errors", msg, opts)
end
end
end