Return the URL of a blog entry, relative to this page.

def get_entry_url(self, entry):
        """
        Return the URL of a blog entry, relative to this page.
        """
        # It could be possible this page is fetched as fallback, while the 'entry' does have a translation.
        # - Currently django-fluent-pages 1.0b3 `Page.objects.get_for_path()` assigns the language of retrieval
        #   as current object language. The page is not assigned a fallback language instead.
        # - With i18n_patterns() that would make strange URLs, such as '/en/blog/2016/05/dutch-entry-title/'
        # Hence, respect the entry language as starting point to make the language consistent.
        with switch_language(self, entry.get_current_language()):
            return self.get_absolute_url() + entry.get_relative_url()