checks.py 文件源码

def _check_readonly_fields_item(self, obj, model, field_name, label):
        if callable(field_name):
            return []
        elif hasattr(obj, field_name):
            return []
        elif hasattr(model, field_name):
            return []
        else:
            try:
                model._meta.get_field(field_name)
            except FieldDoesNotExist:
                return [
                    checks.Error(
                        "The value of '%s' is not a callable, an attribute of '%s', or an attribute of '%s.%s'." % (
                            label, obj.__class__.__name__, model._meta.app_label, model._meta.object_name
                        ),
                        obj=obj.__class__,
                        id='admin.E035',
                    )
                ]
            else:
                return []