helpers.py 文件源码

def contents(self):
        from django.contrib.admin.templatetags.admin_list import _boolean_icon
        field, obj, model_admin = self.field['field'], self.form.instance, self.model_admin
        try:
            f, attr, value = lookup_field(field, obj, model_admin)
        except (AttributeError, ValueError, ObjectDoesNotExist):
            result_repr = self.empty_value_display
        else:
            if f is None:
                boolean = getattr(attr, "boolean", False)
                if boolean:
                    result_repr = _boolean_icon(value)
                else:
                    if hasattr(value, "__html__"):
                        result_repr = value
                    else:
                        result_repr = smart_text(value)
                        if getattr(attr, "allow_tags", False):
                            warnings.warn(
                                "Deprecated allow_tags attribute used on %s. "
                                "Use django.utils.safestring.format_html(), "
                                "format_html_join(), or mark_safe() instead." % attr,
                                RemovedInDjango20Warning
                            )
                            result_repr = mark_safe(value)
                        else:
                            result_repr = linebreaksbr(result_repr)
            else:
                if isinstance(f.remote_field, ManyToManyRel) and value is not None:
                    result_repr = ", ".join(map(six.text_type, value.all()))
                else:
                    result_repr = display_for_field(value, f, self.empty_value_display)
                result_repr = linebreaksbr(result_repr)
        return conditional_escape(result_repr)