Question

目前我有这个型号：

class Group(models.Model):
    def __str__(self):
        return(self.name)

    dependency = models.ManyToManyField('self',related_name='group_rel')
    name = models.TextField()


class Publication(models.Model):

    name = models.TextField()
    group = models.ManyToManyField(Group, related_name='group_dependency')

我可以让所有父亲（团体）成为一个团体。

group = Group.objects.filter(pk=1)[0]
group.dependency.all()

但我想查询一个小组的所有儿童（群组）。

dir(group)

[＆＃39; DoesNotExist＆＃39;，＆＃39; MultipleObjectsReturned＆＃39;，＆＃39; class ＆＃39;，＆＃39; delattr ＆＃39;，＆＃39; dict ＆＃39;，＆＃39; dir ＆＃39;，＆＃39; doc ＆＃39;，＆＃39; eq ＆＃39;，＆＃39; 格式＆＃39;，＆＃39; ge < / strong>＆＃39;，＆＃39; getattribute ＆＃39;，＆＃39; gt ＆＃39;，＆＃39; 哈希＆＃39;，＆＃39; init ＆＃39;，＆＃39; init_subclass ＆＃39;，＆＃39; le ＆＃39;，＆＃39; lt ＆＃39;，＆＃39; 模块＆＃39;，＆＃39; ne ＆＃39;，＆＃39; new ＆＃39;，＆＃39; reduce ＆＃39;，＆＃39; < strong> reduce_ex ＆＃39;，＆＃39; repr ＆＃39;，＆＃39; setattr ＆＃39;，＆＃39; setstate ＆＃39;，＆＃39; sizeof ＆＃39;，＆＃39; str ＆＃39;，＆＃39; ; 子类别＆＃39;，＆＃39; 弱点＆＃39;，＆＃39; _chec k_column_name_clashes＆＃39;，＆＃39; _check_field_name_clashes＆＃39;，＆＃39; _check_fields＆＃39;，＆＃39; _check_id_field＆＃39;，＆＃39; _check_index_together＆＃39;，＆＃39; _check_local_fields＆＃39;，＆＃39; _check_long_column_names＆＃39;，＆＃39; _check_m2m_through_same_relationship＆＃39;，＆＃39; _check_managers＆＃39;，＆＃39; _check_model＆＃39;，＆＃39; _check_model_name_db_lookup_clashes＆＃39;，＆＃39; _check_ordering＆＃39;，＆＃39; _check_swappable＆＃39;，＆＃39; _check_unique_together＆＃39;，＆＃39; _do_insert＆＃39;，＆＃39; _do_update＆＃39;，＆＃39; _get_FIELD_display＆＃39;，＆＃39; _get_next_or_previous_by_FIELD＆＃39;，＆＃39; _get_next_or_previous_in_order＆＃39;，＆＃39; _get_pk_val＆＃39;，＆＃39; _get_unique_checks＆＃39;，＆＃39; _meta＆＃39;，＆＃39; _perform_date_checks＆＃ 39;，＆＃39; _perform_unique_checks＆＃39;，＆＃39; _save_parents＆＃39;，＆＃39; _save_table＆＃39;，＆＃39; _set_pk_val＆＃39;，＆＃39; _state＆＃39;，＆＃ 39;检查＆＃39;，＆＃39;清除＆＃39;，＆＃39; clean_fields＆＃39;，＆＃39; date_error_message＆＃39;，＆＃39;删除＆＃39;，＆＃39;依赖＆＃39 ;，＆＃39; from_db＆＃39;，＆＃39; full_clean＆＃3 9;，＆＃39; get_deferred_fields＆＃39;，＆＃39; group_dependency＆＃39;，＆＃39; id＆＃39;，＆＃39; name＆＃39;，＆＃39; objects＆＃39;，＆＃ 39; pk＆＃39;，＆＃39; prepare_database_save＆＃39;，＆＃39; refresh_from_db＆＃39;，＆＃39;保存＆＃39;，＆＃39; save_base＆＃39;，＆＃39; seri alizable_value＆＃ 39;，＆＃39; unique_error_message＆＃39;，＆＃39; validate_unique＆＃39;]

注意：出版物是不使用此问题。我只是展示它，因为有很多人可以分组。

Answer 1

您已将多对多字段命名为dependency，因此您应该使用该字段。

group.dependency.all()

Django：查询many2many自引用

1 个答案: