Add the entries view to urls.

def get_urls(self):
        """
        Add the entries view to urls.
        """
        urls = super(FormAdmin, self).get_urls()
        extra_urls = [
            url("^(?P<form_id>\d+)/entries/$",
                self.admin_site.admin_view(self.entries_view),
                name="form_entries"),
            url("^file/(?P<field_entry_id>\d+)/$",
                self.admin_site.admin_view(self.file_view),
                name="form_file"),
        ]
        return extra_urls + urls